CN110445468A - A kind of double flat weighing apparatus active mixer - Google Patents
A kind of double flat weighing apparatus active mixer Download PDFInfo
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- CN110445468A CN110445468A CN201910750131.4A CN201910750131A CN110445468A CN 110445468 A CN110445468 A CN 110445468A CN 201910750131 A CN201910750131 A CN 201910750131A CN 110445468 A CN110445468 A CN 110445468A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1425—Balanced arrangements with transistors
- H03D7/1441—Balanced arrangements with transistors using field-effect transistors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1425—Balanced arrangements with transistors
- H03D7/1458—Double balanced arrangements, i.e. where both input signals are differential
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1425—Balanced arrangements with transistors
- H03D7/1491—Arrangements to linearise a transconductance stage of a mixer arrangement
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Abstract
The invention discloses a kind of double flat weighing apparatus active mixers comprising transconductance stage, the first double flat weighing apparatus switching stage, the second double flat weighing apparatus switching stage, third double flat weighing apparatus switching stage, the 4th double flat weighing apparatus switching stage, load stage and multiphase filter.The present invention passes through the first double flat weighing apparatus switching stage, second double flat weighing apparatus switching stage, third double flat weighing apparatus switching stage and the 4th double flat weighing apparatus switching stage can realize that two-stage is mixed, to reduce to the first double flat weighing apparatus switching stage, second double flat weighing apparatus switching stage, third double flat weighs the frequency requirement of the respective required difference local oscillation signal of switching stage and the 4th double flat weighing apparatus switching stage, and make the first double flat weighing apparatus switching stage, second double flat weighing apparatus switching stage, third double flat weigh switching stage and the 4th double flat weighing apparatus switching stage respectively required difference local oscillation signal frequency can separate radio-frequency differential voltage input signal frequency to prevent from interfering.
Description
Technical field
The present invention relates to the technical fields of RF IC, particularly relate to a kind of double flat weighing apparatus active mixer.
Background technique
With the fast development of wireless communication technique, it is applied to satellite television, satellite communication, satellite navigation, satellite interconnection
The radio frequency transceiver of the various occasions such as net and remote sensing receives extensive attention.The performance of radio frequency transceiver is directly related to entirely
The performance indicator of wireless communication system.Frequency mixer is the nucleus module in radio frequency transceiver, design high-conversion-gain, low noise,
High linearity, high-isolation frequency mixer be the tireless pursuit of Radio Frequency Engineer.Meanwhile with wireless communication to microwave,
The development of millimeter wave high band, the frequency of local oscillation signal is also higher and higher, and designs the oscillator of high frequency and frequency divider is still ten
Divide difficult thing.
Fig. 1 show traditional double flat weighing apparatus active mixer.1 ' radio-frequency differential voltage input signal RF+ ' of transconductance stage, RF- '
Be converted to current signal be output to double flat weighing apparatus switching stage 3 ', double flat weigh switching stage 3 ' by difference local oscillation signal LO+ ', LO- ' and electricity
Stream signal carries out mixing and is converted to current intermediate frequency signal IF1+ ', IF1- ', and load stage 2 ' is by current intermediate frequency signal IF1+ ', IF1- '
Be converted to voltage intermediate frequency signal IF+ ', IF- ' output.It is defeated when traditional double flat weighing apparatus active mixer works as low-converter
The frequency of voltage intermediate frequency signal IF+ ', IF- ' out are equal to radio-frequency differential voltage input signal RF+ ', the frequency of RF- ' subtracts difference
Divide the frequency of local oscillation signal LO+ ', LO- '.
Double flat weighing apparatus active mixer is also referred to as Gilbert unit；Wherein by four transistors in double flat weighing apparatus switching stage 3 '
Two pairs of differential amplifiers are formed, the common source end of every a pair of differential amplifier is serially connected with an output end of transconductance stage 1 ', two pairs of differences
The output end reverse phase of dynamic amplifier connects.In general, radio-frequency differential voltage input signal RF+ ', RF- ' they are small signal, and difference sheet
Signal LO+ ', LO- ' shake for big increment signal.Movement certain in a flash, double flat weighs two pairs of differential amplifiers of switching stage 3 '
The state being in two transistors that output end connects, and another is then in the state of cut-off, it is then, double
Two switching tubes in the conductive state of balance cock grade 3 ' then form the construction of multiplier with transconductance stage 1 '.According to multiplier
Operating principle, the signal of two frequencies will be present in the signal of multiplier outputs, and the frequency of first signal is radio-frequency differential
Voltage input signal RF+ ', RF- ' frequency subtract the frequency of difference local oscillation signal LO+ ', LO- ', and the frequency of second signal
Be then radio-frequency differential voltage input signal RF+ ', RF- ' frequency plus difference local oscillation signal LO+ ', LO- ' frequency.Work as double flat
When the active mixer that weighs is acted as low-converter, for second signal because of the hindrance function of load stage, second signal can quilt
Decay to it is sufficiently small, therefore double flat weighing apparatus active mixer output signal be first signal.
Due to the effect of local oscillator switch, voltage intermediate frequency signal IF+ ', IF- ' are phase after two pairs of differential transistor crossed works
Superposition as a result, compared with single balance mixer or other types of frequency mixer, double flat weighs the output spectrum of active mixer
In include clutter it is less, do not include local oscillation signal ingredient, also do not include radio-frequency differential voltage input signal RF+ ', RF- ' at
Point；And provide radio-frequency differential voltage input signal, difference local oscillation signal, higher isolation between voltage intermediate frequency signal.
But as the communication technology is towards high band development, the frequency of radio-frequency differential voltage input signal is higher and higher, this
So that the frequency requirement of difference local oscillation signal needed for traditional double flat weighing apparatus active mixer is higher and higher；And difference local oscillation signal
Frequency it is higher, the design difficulty for providing the local oscillator source circuit of difference local oscillation signal is also increasing, and local oscillator source circuit
Power consumption is also increasing, and frequency mixer and local vibration source circuit parasitic effects are also increasingly severe, so that traditional double flat
The performances such as conversion gain, noise, the linearity of weighing apparatus active mixer sharply deteriorate.
In addition with the raising of the integrated level of high-frequency integrated circuit, the high frequency input multichannel intermediate frequency output of multichannel different frequency
Mixting circuit be all integrated in the situation in same multichannel mixing integrated chip also more and more frequently, such multichannel mixing collection
Its function is realized at multiple frequency mixers are needed to have on chip.When the difference local oscillation signal frequency of wherein certain mixting circuit all the way
Close to another way mixting circuit radio-frequency differential voltage input signal frequency when, after the former difference local oscillation signal can leak into
The rf inputs of person and generate spurious signal after being mixed with the difference local oscillation signal of the latter, seriously affect the reception of another way signal
Performance.
Summary of the invention
The purpose of the present invention is to provide a kind of double flat weighing apparatus active mixers, can realize to differential input signal and mix twice
Frequently double flat weighing apparatus active mixer is reduced to the frequency requirement of difference local oscillation signal.
In order to achieve the above objectives, solution of the invention is:
A kind of double flat weighing apparatus active mixer of the invention comprising transconductance stage, the first double flat weighing apparatus switching stage, the second double flat weighing apparatus
Switching stage and load stage；Wherein the transconductance stage is for receiving radio-frequency differential voltage input signal and by radio-frequency differential voltage input
Signal is converted to the output of radio-frequency differential current signal；The first input end and the second input terminal point of the first double flat weighing apparatus switching stage
It is not connected with the first output end of transconductance stage, second output terminal, the first double flat weighing apparatus switching stage is used for the first difference local oscillation signal
It is mixed with radio-frequency differential current signal and generates the output of the first difference current intermediate frequency signal；The second double flat weighing apparatus switching stage
First input end and the second input terminal be connected respectively with the first output end of the first double flat weighing apparatus switching stage and second output terminal, the
Two double flats weighing apparatus switching stage generates final for the second difference local oscillation signal to be mixed with the first difference current intermediate frequency signal
The output of difference current intermediate frequency signal；The first output end and second output terminal of the load stage and the second double flat weighing apparatus switching stage are distinguished
It is connected, load stage is used to being converted to final difference current intermediate frequency signal into final difference voltage intermediate frequency signal and export.
The frequency of the first difference local oscillation signal and the second difference local oscillation signal is identical as phase.
In a kind of double flat weighing apparatus active mixer of the invention, pass through the first double flat weighing apparatus switching stage, second pair of balance cock
The achievable two-stage mixing of grade, to reduce to the first double flat weighing apparatus switching stage the first difference local oscillation signal and second pair of balance cock
The frequency requirement of second difference local oscillation signal of grade, and the first difference local oscillation signal and the of the first double flat weighing apparatus switching stage can be made
Frequency of the frequency energy far from radio-frequency differential voltage input signal of second difference local oscillation signal of two double flats weighing apparatus switching stage is to prevent
Interference.
Another double flat weighing apparatus active mixer of the invention comprising transconductance stage, the first double flat weighing apparatus switching stage, the second double flat
Weigh switching stage, third double flat weighing apparatus switching stage, load stage and multiphase filter；Wherein the transconductance stage is for receiving radio-frequency differential electricity
Radio-frequency differential voltage input signal is simultaneously converted to the output of radio-frequency differential current signal by pressure input signal；The first double flat weighing apparatus is opened
The first input end and the second input terminal for closing grade are connected with the first output end and second output terminal of transconductance stage respectively, the first double flat
First difference local oscillation signal for being mixed with radio-frequency differential current signal and generating the first difference medium frequency electric by weighing apparatus switching stage
Flow signal output；The first input end and the second input terminal of second double flat weighing apparatus switching stage weigh with the first double flat switching stage respectively
The first output end be connected with second output terminal, the second double flat switching stage that weighs is used for the second difference local oscillation signal and the first difference
Current intermediate frequency signal is mixed and generates the output of the second difference current intermediate frequency signal；The first of the third double flat weighing apparatus switching stage
Input terminal and the second input terminal are connected with the first output end of the first double flat weighing apparatus switching stage and second output terminal respectively, third double flat
Third difference local oscillation signal for being mixed with the first difference current intermediate frequency signal and being generated in third difference by weighing apparatus switching stage
The output of frequency current signal, the third differential intermediate frequency is identical as the second differential intermediate frequency frequency and quadrature in phase；It is described negative
Carry grade and second double flat weighing apparatus switching stage the first output end and second output terminal and third double flat weighing apparatus switching stage first
Output end and second output terminal are respectively connected with, and load stage is used for the second difference current intermediate frequency signal and third difference electric current of intermediate frequency
Signal is converted to the second difference voltage intermediate frequency signal and the output of third difference voltage intermediate frequency signal；The first of the multiphase filter
To the 4th input terminal respectively with the first output end of the second double flat weighing apparatus switching stage and the double balance cocks of second output terminal and third
First output end of grade is connected with second output terminal, and multiphase filter is used to filter out the second difference voltage intermediate frequency signal and third is poor
The second difference voltage intermediate frequency signal and third after dividing image signal and selection in voltage intermediate frequency signal to filter out image signal is poor
One of voltage intermediate frequency signal is divided to export as final difference voltage intermediate frequency signal.
The first difference local oscillation signal, the second difference local oscillation signal are identical with the frequency of third difference local oscillation signal.
In another double flat weighing apparatus active mixer of the invention, opened by the first double flat weighing apparatus switching stage, the second double flat weighing apparatus
Closing grade and third double flat weighing apparatus switching stage can realize that two-stage is mixed, to reduce to the first double flat weighing apparatus the first difference of switching stage local oscillator
The third difference local oscillation signal of signal, the second difference local oscillation signal of the second double flat weighing apparatus switching stage and third double flat weighing apparatus switching stage
Frequency requirement, and can make the first difference local oscillation signal of the first double flat weighing apparatus switching stage, the second double flat weighing apparatus switching stage it is second poor
Dividing the frequency of the third difference local oscillation signal of local oscillation signal and third double flat weighing apparatus switching stage can believe far from radio-frequency differential voltage input
Number frequency to prevent from interfering；And the second difference voltage intermediate frequency signal and third difference are filtered out by the multiphase filter
Image signal in voltage intermediate frequency signal.
Another double flat weighing apparatus active mixer of the invention comprising transconductance stage, the first double flat weighing apparatus switching stage, the second double flat
Weigh switching stage, third double flat weighing apparatus switching stage, the 4th double flat weighing apparatus switching stage, load stage and multiphase filter；The wherein transconductance stage
It is defeated for receiving radio-frequency differential voltage input signal and radio-frequency differential voltage input signal being converted to radio-frequency differential current signal
Out；The first input end and the second input terminal of first double flat weighing apparatus switching stage respectively with the first output end of transconductance stage and second
Output end is connected, the first double flat weighing apparatus switching stage for the first difference local oscillation signal to be mixed with radio-frequency differential current signal and
Generate the output of the first difference current intermediate frequency signal；The first input end and the second input terminal difference of the third double flat weighing apparatus switching stage
It is connected with the first output end and second output terminal of transconductance stage, third double flat weighs switching stage for making third difference local oscillation signal
It number is mixed with radio-frequency differential current signal and generates the output of third difference current intermediate frequency signal；First pair of balance cock
The first output end and second output terminal of grade are connect with the first output end of third double flat weighing apparatus switching stage and second output terminal respectively,
So that the first difference current intermediate frequency signal and third difference current intermediate frequency signal are vector superposed and form differential electric current of intermediate frequency letter
Number；The first difference current intermediate frequency signal is identical with third difference current intermediate frequency signal frequency and quadrature in phase；Described second
Double flat weigh switching stage first input end and the second input terminal respectively with the first double flat weighing apparatus switching stage the first output end and second
Output end is connected, and the second difference local oscillation signal for being mixed with current intermediate frequency signal and being generated by the second double flat weighing apparatus switching stage
The output of second difference current intermediate frequency signal；The first input end and the second input terminal of 4th double flat weighing apparatus switching stage are respectively with the
First output end of three double flats weighing apparatus switching stage is connected with second output terminal, and the 4th double flat weighing apparatus switching stage is used for the 4th difference local oscillator
Signal is mixed with current intermediate frequency signal and generates the output of the 4th difference current intermediate frequency signal；The second difference electric current of intermediate frequency
The frequency and quadrature in phase of signal and the 4th difference current intermediate frequency signal；The load stage and second double flat weighing apparatus switching stage
The first output end and second output terminal of first output end and second output terminal and the 4th double flat weighing apparatus switching stage are respectively connected with, and are born
Grade is carried to be used to being converted to the second difference current intermediate frequency signal and the 4th difference current intermediate frequency signal into the second difference voltage of intermediate frequency letter
Number and the 4th difference voltage intermediate frequency signal output；First to fourth input terminal of the multiphase filter weighs with the second double flat respectively
The first output end and second output terminal phase of the first output end and second output terminal of switching stage and the 4th double flat weighing apparatus switching stage
Even, multiphase filter is used to filter out the image signal in the second difference voltage intermediate frequency signal and the 4th difference voltage intermediate frequency signal simultaneously
Choose the conduct of one of the second difference voltage intermediate frequency signal and the 4th difference voltage intermediate frequency signal after filtering out image signal
Final difference voltage intermediate frequency signal output.
The first inductance is parallel between the first output end and second output terminal of the transconductance stage.
Between the second output terminal of the first double flat weighing apparatus switching stage and the first output end of third double flat weighing apparatus switching stage simultaneously
It is associated with the second inductance.
In another double flat weighing apparatus active mixer of the invention, opened by the first double flat weighing apparatus switching stage, the second double flat weighing apparatus
Closing grade, third double flat weighing apparatus switching stage and the 4th double flat weighing apparatus switching stage can realize that two-stage is mixed, and weigh to reduce to the first double flat
The first difference of switching stage local oscillation signal, the second difference local oscillation signal of the second double flat weighing apparatus switching stage, third double flat weighing apparatus switching stage
The frequency requirement of 4th difference local oscillation signal of third difference local oscillation signal and the 4th double flat weighing apparatus switching stage, and first pair can be made
First difference local oscillation signal of balance cock grade, the second difference local oscillation signal of the second double flat weighing apparatus switching stage, third double flat weighing apparatus are opened
The frequency for closing the third difference local oscillation signal of grade and the 4th difference local oscillation signal of the 4th double flat weighing apparatus switching stage can be far from radiofrequency difference
The frequency of component voltage input signal is to prevent from interfering.And the present invention has filtered out the second difference voltage of intermediate frequency by multiphase filter
Image signal in signal and the 4th difference voltage intermediate frequency signal；And the present invention is defeated in the first output end of transconductance stage and second
The first inductance, parasitic capacitance between the first inductance meeting and the first output end and second output terminal of transconductance stage are parallel between outlet
It generates resonance and eliminates influence of the parasitic capacitance to circuit performance, improve conversion gain and noiseproof feature of the invention.In addition
The is parallel between the second output terminal of first double flat weighing apparatus switching stage and the first output end of third double flat weighing apparatus switching stage
Two inductance, this allows the present invention to obtain higher conversion gain and lower noise coefficient.
Detailed description of the invention
Fig. 1 is the functional block diagram of traditional double flat weighing apparatus active mixer；
Fig. 2 is the functional block diagram of the embodiment of the present invention one；
Fig. 3 is the circuit diagram of the embodiment of the present invention one；
Fig. 4 is the functional block diagram of the embodiment of the present invention two；
Fig. 5 is the circuit diagram of the embodiment of the present invention two；
Fig. 6 is the functional block diagram of the embodiment of the present invention three；
Fig. 7 is the transconductance stage of the embodiment of the present invention three, the first double flat weighing apparatus switching stage, the second double flat weighing apparatus switching stage, third pair
Balance cock grade, the 4th double flat weighing apparatus switching stage, the first intermediate-frequency strip, the second intermediate-frequency strip, third intermediate-frequency strip, the 4th
The circuit diagram of intermediate-frequency strip and load stage；
Fig. 8 is the circuit diagram for the multiphase filter that the present invention applies example three.
Specific embodiment
In order to further explain the technical solution of the present invention, being explained in detail below by specific embodiment the present invention
It states.
Embodiment one:
As shown in Fig. 2, in the embodiment of the present invention one, a kind of double flat weighing apparatus active mixer, including transconductance stage 1, first pair
Balance cock grade 3, the second double flat weighing apparatus switching stage 4 and load stage 2；Wherein the transconductance stage 1 is defeated for receiving radio-frequency differential voltage
Enter signal RF+, RF- and that radio-frequency differential voltage input signal RF+, RF- are converted to radio-frequency differential current signal rf+, rf- is defeated
Out；The first input end and the second input terminal of first double flat weighing apparatus switching stage 3 respectively with the first output end of transconductance stage 1 and the
Two output ends are connected, and the first double flat weighs switching stage 3 for believing first difference local oscillation signal LO1+, LO1- and radio-frequency differential electric current
Number rf+, rf- are mixed and generate first difference current intermediate frequency signal IF1+, IF1- output；The second double flat weighing apparatus switching stage
4 first input end and the second input terminal are connected with the first output end of the first double flat weighing apparatus switching stage 1 and second output terminal respectively,
Second double flat weigh switching stage 4 be used for by second difference local oscillation signal LO2+, LO2- and the first difference current intermediate frequency signal IF1+,
IF1- be mixed and generate final difference current intermediate frequency signal IF '+, IF '-output；The load stage 2 is opened with the second double flat weighing apparatus
Close grade 4 the first output end and second output terminal be respectively connected with, load stage 2 be used for by final difference current intermediate frequency signal IF '+,
IF '-is converted to final difference voltage intermediate frequency signal IF+, IF- output.Wherein described first difference local oscillation signal LO1+, LO1- and
The frequency of second difference local oscillation signal LO2+, LO2- is identical as phase, so that the first double flat weighing apparatus switching stage 3 and the second double flat
Weighing apparatus switching stage 4 can access same local oscillator source circuit and simplify circuit.
Fig. 3 is a specific circuit theory legend of the embodiment of the present invention one, as shown in connection with fig. 3, in example 1,
The transconductance stage 1 includes the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, first resistor R1 and second resistance R2；Wherein the first metal-oxide-semiconductor M1
Grid and the grid of the second metal-oxide-semiconductor M2 be separately connected the first input end and the second input terminal of the transconductance stage 1；First MOS
The drain electrode of pipe M1 and the drain electrode of the second metal-oxide-semiconductor M2 are separately connected the first output end and second output terminal of the transconductance stage 1；First
One end of the source electrode connection first resistor R1 of metal-oxide-semiconductor M1, one end of the source electrode connection second resistance R2 of the second metal-oxide-semiconductor M2, first
The other end of resistance R1 and the other end ground connection of second resistance R2.In the present embodiment, transconductance stage 1 uses resistance source degeneration
Structure, when the grid voltage of the first metal-oxide-semiconductor M1 increases, the gate source voltage difference of the first metal-oxide-semiconductor M1 is increased, so that the first metal-oxide-semiconductor
M1 exports electric current and increases, and the pressure drop of first resistor R1 is increased, so that the gate source voltage difference of the first metal-oxide-semiconductor M1 drops
It is low, so that the gate source voltage difference of the first metal-oxide-semiconductor M1 maintains a stable state；And when the grid voltage of the second metal-oxide-semiconductor M2 increases
When, the gate source voltage difference of the second metal-oxide-semiconductor M2 increases, so that the second metal-oxide-semiconductor M2 output electric current increases, and makes second resistance R2's
Pressure drop increases, so that the gate source voltage difference of the second metal-oxide-semiconductor M2 reduces, so that the gate source voltage difference of the second metal-oxide-semiconductor M2 maintains
One stable state, the gate source voltage difference of such first metal-oxide-semiconductor M1 and the gate source voltage difference of the second metal-oxide-semiconductor M2 maintain to stablize, and mention
The linearity of one of high embodiment one double flat weighing apparatus active mixer.
Cooperate shown in Fig. 3, in example 1, the first double flat weighing apparatus switching stage 3 includes third metal-oxide-semiconductor M3, the 4th MOS
Pipe M4, the 5th metal-oxide-semiconductor M5 and the 6th metal-oxide-semiconductor M6；The source electrode of third metal-oxide-semiconductor M3 and the source electrode of the 4th metal-oxide-semiconductor M4 connect first pair
The first input end of balance cock grade 3, the source electrode of the 5th metal-oxide-semiconductor M5 and the source electrode of the 6th metal-oxide-semiconductor M6 connect the first double flat weighing apparatus and open
Close the second input terminal of grade 3；The grid of third metal-oxide-semiconductor M3 and the grid of the 6th metal-oxide-semiconductor M6 access the first difference local oscillation signal
The grid of positive signal LO1+, the 4th metal-oxide-semiconductor M4 and the grid of the 5th metal-oxide-semiconductor M5 access the negative signal of the first difference local oscillation signal
LO1-；The second output terminal of drain electrode connection the first double flat weighing apparatus switching stage 3 of the drain electrode and the 5th metal-oxide-semiconductor M5 of third metal-oxide-semiconductor M3, the
The second output terminal of drain electrode connection the first double flat weighing apparatus switching stage 3 of the drain electrode and the 6th metal-oxide-semiconductor M6 of four metal-oxide-semiconductor M4；Described second
Double flat weighing apparatus switching stage 4 includes the 7th metal-oxide-semiconductor M7, the 8th metal-oxide-semiconductor M8, the 9th metal-oxide-semiconductor M9 and the tenth metal-oxide-semiconductor M10；7th metal-oxide-semiconductor
The source electrode of the source electrode of M7 and the 8th metal-oxide-semiconductor M8 connect the first input end of the second double flat weighing apparatus switching stage 4, the source of the 9th metal-oxide-semiconductor M9
Pole connects the second input terminal of the second double flat weighing apparatus switching stage 4 with the source electrode of the tenth metal-oxide-semiconductor M10；The grid of 7th metal-oxide-semiconductor M7 and
The grid of ten metal-oxide-semiconductor M10 accesses the grid and the 9th metal-oxide-semiconductor of the positive signal LO2+, the 8th metal-oxide-semiconductor M8 of the second difference local oscillation signal
The grid of M9 accesses the negative signal LO2- of the second difference local oscillation signal；The drain electrode of 7th metal-oxide-semiconductor M7 and the drain electrode of the 9th metal-oxide-semiconductor M9
The first output end of the second double flat weighing apparatus switching stage 4 is connected, the drain electrode of the 8th metal-oxide-semiconductor M8 connects the with the drain electrode of the tenth metal-oxide-semiconductor M10
The second output terminal of two double flats weighing apparatus switching stage 4.
Cooperate shown in Fig. 3, in example 1, the load stage 2 includes 3rd resistor R3 and the 4th resistance R4；Third electricity
The resistance value for hindering R3 and the 4th resistance R4 is identical；DC power supply VDD is accessed in one end of 3rd resistor R3 and one end of the 4th resistance R4；
The other end of 3rd resistor R3 connects the first output end of the second double flat weighing apparatus switching stage 4, the other end connection of the 4th resistance R4 the
The second output terminal of two double flats weighing apparatus switching stage 4.
In example 1, it can realize and be mixed twice by the first double flat weighing apparatus switching stage 3 and the second double flat weighing apparatus switching stage 4,
The frequency of final difference voltage intermediate frequency signal IF+, IF- of output are equal to the frequency of radio-frequency differential voltage input signal RF+, RF-
The frequency for subtracting first difference local oscillation signal LO1+, LO1- subtracts the frequency of second difference local oscillation signal LO2+, LO2- again, reduces
To the frequency requirement of first difference local oscillation signal LO1+, LO1- and second difference local oscillation signal LO2+, LO2-, so that first is poor
Divide the frequency of local oscillation signal LO1+, LO1- and second difference local oscillation signal LO2+, LO2- to may be located remotely from radio-frequency differential input signal
The frequency of RF+, RF- can be reduced in this way for providing first difference local oscillation signal LO1+, LO1- and the second difference local oscillator letter
The local vibration source circuit design difficulty and power consumption of number LO2+, LO2- enable a kind of double flat of the present embodiment active mixer that weighs to mention
High-conversion-gain, noise-reduction coefficient simultaneously improve the linearity.
The course of work of the embodiment of the present invention one illustrated below；
Such as: the frequency of radio-frequency differential voltage input signal RF+, RF- be 12GHz, the first difference local oscillation signal LO1+,
The 5.6GHz of the frequency setting of LO1-, the frequency of second difference local oscillation signal LO2+, LO2- is set as 5.0GHz, then first is poor
The frequency for dividing current intermediate frequency signal IF1+, IF1- is 6.4GHz, at this point, the mirror image of radio-frequency differential voltage input signal RF+, RF-
Frequency has fallen in the negative place 0.8GHz, so image signal is not present, and allows a kind of active mixing of double flat weighing apparatus of the present embodiment
Thermal noise at the raised image frequency of the noise coefficient of device is also not present, and the frequency conversion of low noise may be implemented；The of 6.4GHz
After one difference current intermediate frequency signal IF1+, IF1- is mixed by the second double flat weighing apparatus switching stage 4, it can obtain 1.4GHz's
Final difference voltage intermediate frequency signal IF+, IF-, although the second harmonic frequency of first difference local oscillation signal LO1+, LO1- is
11.2GHz, close to 12 GHz of frequency of radio-frequency differential voltage input signal RF+, RF-, but due to the first double flat weighing apparatus switching stage 3
The mode of double flat weighing apparatus is all made of with the construction of the second double flat weighing apparatus switching stage 4, first difference local oscillation signal LO1+, LO1-'s is secondary
Harmonic wave can be supported in the conduction pipe of the first double flat weighing apparatus 3 two pairs of differential amplifiers of switching stage and the interactive action of blanking tube
Disappear, so not will form the spurious signal close to final difference voltage intermediate frequency signal IF+, IF- frequency.
Another example is: in the satellite TV system of general Ku wave band, the low wave of radio-frequency differential voltage input signal RF+, RF-
Band frequency is 10.7GHz~11.7GHz, and high-band frequencies are 11.7GHz~12.75GHz；The final difference voltage of intermediate frequency of output
The low band of signal IF+, IF- are 0.95GHz~1.95GHz, and high band is 1.1GHz~2.15GHz；For such application
System, the highly integrated chip that the input of Yao Shixian two-way radio frequency, two-way intermediate frequency export, if using traditional active mixing of double flat weighing apparatus
Device weighs in first via double flat in this way then the low-band frequency of local oscillation signal should be 9.75GHz, high-band frequencies 10.6GHz
The final difference voltage intermediate frequency signal of active mixer output is low frequency end, and the second tunnel double flat weighing apparatus active mixer exports final
When difference voltage intermediate frequency signal is high band, the local oscillation signal of the 10.6GHz of the second tunnel double flat weighing apparatus active mixer can be leaked into
First via double flat weighs in active mixer, and with the noise signal for generating 0.85GHz after the local oscillation signal mixing of 9.75GHz, this is miscellaneous
Two times of wave frequency rates of wave signal are 1.7GHz, are just fallen among the high band of final difference voltage intermediate frequency signal IF+, IF-, sternly
The receptivity of the second tunnel double flat weighing apparatus active mixer is affected again；And realize the height of two-way radio frequency input, the output of two-way intermediate frequency
When integrated chip uses a kind of double flat weighing apparatus active mixer of the present embodiment, it is in the final difference voltage intermediate frequency signal of output
When high band, the frequency of first difference local oscillation signal LO1+, LO1- is set as 5.6GHz and the second difference local oscillation signal LO2+,
The frequency of LO2- is set as 5.0GHz；When the final differential intermediate frequency of output is low band, the first difference local oscillation signal LO1
+, the frequency of LO1- is set as 5.0GHz and the frequency of second difference local oscillation signal LO2+, LO2- is set as 4.75GHz；So,
Even if first difference local oscillation signal LO1+, LO1- and the second difference local oscillation signal LO2+ of first via double flat weighing apparatus active mixer,
LO2- is leaked into the second tunnel double flat weighing apparatus active mixer, and the frequency of the generation noise signal after mixing has fallen on second
Road double flat weigh active mixer final difference voltage intermediate frequency signal IF+, IF- maximum frequency 2.15GHz on, will not be to the
The receptivity of two tunnel double flats weighing apparatus active mixer impacts.
It should be noted that transconductance stage 1, the first double flat weighing apparatus switching stage 3 in the embodiment of the present invention one, the second double flat weighing apparatus are opened
Closing range involved in grade 4 and load stage 2 includes but is not limited to circuit theory legend shown in Fig. 3, it is all meet it is of the invention
The transconductance stage circuit of intention, switching stage circuit and load circuit and combinations thereof belong to protection scope of the present invention.
Embodiment two:
As shown in figure 4, in the embodiment of the present invention two, a kind of double flat weighing apparatus active mixer, including transconductance stage 1, the first double flat
Weigh switching stage 3, the second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5, load stage 2 and multiphase filter 7；Wherein it is described across
Grade 1 is led for receiving radio-frequency differential voltage input signal RF+, RF- and being converted to radio-frequency differential voltage input signal RF+, RF-
Radio-frequency differential current signal rf+, rf- output；The first input end and the second input terminal difference of the first double flat weighing apparatus switching stage 1
It is connected with the first output end and second output terminal of transconductance stage 1, the first double flat weighing apparatus switching stage 3 is used for the first difference local oscillation signal
L01+, L01- are mixed with radio-frequency differential current signal rf+, rf- and generate first difference current intermediate frequency signal IF1+, IF1-
Output；The first input end and the second input terminal of second double flat weighing apparatus switching stage 4 respectively with the first double flat weighing apparatus switching stage 3 the
One output end is connected with second output terminal, and the second double flat switching stage 4 that weighs is used for second difference local oscillation signal L02+, L02- and the
One difference current intermediate frequency signal IF1+, IF1- is mixed and generates second difference current intermediate frequency signal IF2+, IF2- output；Institute
State first input end and the first output with the first double flat weighing apparatus switching stage 3 respectively of the second input terminal of third double flat weighing apparatus switching stage 5
End is connected with second output terminal, and third double flat weighing apparatus switching stage 5 is used for third difference local oscillation signal L03+, L03- and the first difference
Current intermediate frequency signal IF1+, IF1- are mixed and generate third difference current intermediate frequency signal IF3+, IF3- output；Third difference
Current intermediate frequency signal IF3+, IF3- be identical as second difference current intermediate frequency signal IF2+, IF2- frequency and quadrature in phase；It is described negative
The first output end and second output terminal and third double flat for carrying grade 2 and the second double flat weighing apparatus switching stage 4 weigh the first defeated of switching stage 5
Outlet and second output terminal are respectively connected with, and load stage 2 is used for second difference current intermediate frequency signal IF2+, IF2- and third difference
Current intermediate frequency signal IF3+, IF3- be converted to the second difference voltage intermediate frequency signal IF2 '+, IF2 '-and third difference voltage of intermediate frequency
Signal IF3 '+, IF3 '-output；First to fourth input terminal of the multiphase filter 7 respectively with the second double flat weigh switching stage 4
The first output end and second output terminal and the first output end of third double flat weighing apparatus switching stage 5 be connected with second output terminal, it is more
Phase filter 7 for filter out the second difference voltage intermediate frequency signal IF2 '+, IF2 '-and third difference voltage intermediate frequency signal IF3 '+,
Image signal and selection in IF3 '-filter out the second difference voltage intermediate frequency signal and third difference voltage of intermediate frequency after image signal
One of signal is exported as final difference voltage intermediate frequency signal IF+, IF-.Wherein the first difference local oscillation signal L01
+, L01-, second difference local oscillation signal L02+, L02- it is identical with the frequency of third difference local oscillation signal L03+, L03-, such
One difference local oscillation signal L01+, L01-, second difference local oscillation signal L02+, L02- and third difference local oscillation signal L03+, L03-
It can be provided by same local oscillator source circuit to simplify circuit.
Fig. 5 is a specific circuit theory legend of the embodiment of the present invention two, as shown in connection with fig. 5, the embodiment of the present invention
The connecting structure of two transconductance stage 1 and the transconductance stage 1 of the embodiment of the present invention one are identical.Cooperate shown in Fig. 5, the embodiment of the present invention two
The first double flat weighing apparatus switching stage 3, the second double flat weighing apparatus switching stage 4 and third double flat weighing apparatus switching stage 5 circuit connection construction with this hair
The circuit connection construction of the first double flat weighing apparatus switching stage 3 in bright embodiment one is identical；Specifically, shown in cooperation Fig. 5, in the present invention
In embodiment two, the first double flat weighing apparatus switching stage 3 includes third metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4, the 5th metal-oxide-semiconductor M5 and the 6th
Metal-oxide-semiconductor M6；The source electrode of third metal-oxide-semiconductor M3 and the source electrode of the 4th metal-oxide-semiconductor M4 connect the first input of the first double flat weighing apparatus switching stage 3
End, the source electrode of the 5th metal-oxide-semiconductor M5 and the source electrode of the 6th metal-oxide-semiconductor M6 connect the second input terminal of the first double flat weighing apparatus switching stage 3；Third
The grid of the grid of metal-oxide-semiconductor M3 and the 6th metal-oxide-semiconductor M6 access the positive signal LO1+, the 4th metal-oxide-semiconductor M4 of the first difference local oscillation signal
Grid and the 5th metal-oxide-semiconductor M5 grid access the first difference local oscillation signal negative signal LO1-；The drain electrode of third metal-oxide-semiconductor M3 and
The second output terminal of drain electrode connection the first double flat weighing apparatus switching stage 3 of 5th metal-oxide-semiconductor M5, the drain electrode of the 4th metal-oxide-semiconductor M4 and the 6th MOS
The second output terminal of drain electrode connection the first double flat weighing apparatus switching stage 3 of pipe M6；The second double flat weighing apparatus switching stage 4 includes the 7th MOS
Pipe M7, the 8th metal-oxide-semiconductor M8, the 9th metal-oxide-semiconductor M9 and the tenth metal-oxide-semiconductor M10；The source electrode of 7th metal-oxide-semiconductor M7 and the source of the 8th metal-oxide-semiconductor M8
Pole connects the first input end of the second double flat weighing apparatus switching stage 4, the source electrode connection of the source electrode and the tenth metal-oxide-semiconductor M10 of the 9th metal-oxide-semiconductor M9
Second input terminal of the second double flat weighing apparatus switching stage 4；The grid access second of the grid and the tenth metal-oxide-semiconductor M10 of 7th metal-oxide-semiconductor M7 is poor
The grid of the grid and the 9th metal-oxide-semiconductor M9 that divide the positive signal LO2+, the 8th metal-oxide-semiconductor M8 of local oscillation signal accesses the second difference local oscillator letter
Number negative signal LO2-；The of drain electrode connection the second double flat weighing apparatus switching stage 4 of the drain electrode and the 9th metal-oxide-semiconductor M9 of 7th metal-oxide-semiconductor M7
One output end, the second output of drain electrode connection the second double flat weighing apparatus switching stage 4 of the drain electrode and the tenth metal-oxide-semiconductor M10 of the 8th metal-oxide-semiconductor M8
End；Third double flat weighing apparatus switching stage 5 includes the 11st metal-oxide-semiconductor M11, the 12nd metal-oxide-semiconductor M12, the 13rd metal-oxide-semiconductor M13 and the
14 metal-oxide-semiconductor M14；The source electrode of 11st metal-oxide-semiconductor M11 and the source electrode connection third double flat weighing apparatus switching stage 5 of the 12nd metal-oxide-semiconductor M12
First input end, the source electrode connection third double flat of the source electrode of the 13rd metal-oxide-semiconductor M13 and the 14th metal-oxide-semiconductor M14 weighs switching stage 5
The second input terminal；The grid access third difference local oscillation signal of the grid and the 14th metal-oxide-semiconductor M14 of 11st metal-oxide-semiconductor M11
The grid access third difference local oscillation signal of the grid and the 13rd metal-oxide-semiconductor M13 of positive signal LO3+, the 12nd metal-oxide-semiconductor M12 is born
Signal LO3-；The of the drain electrode connection third double flat weighing apparatus switching stage 5 of the drain electrode and the 13rd metal-oxide-semiconductor M13 of 11st metal-oxide-semiconductor M11
Two output ends, the of the drain electrode connection third double flat weighing apparatus switching stage 5 of the drain electrode and the 14th metal-oxide-semiconductor M14 of the 12nd metal-oxide-semiconductor M12
Two output ends.Cooperate Fig. 5 shown in, in the embodiment of the present invention two, the load stage 2 include 3rd resistor R3, the 4th resistance R4,
5th resistance R5 and the 6th resistance R5；The resistance value phase of 3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R5
Together；One end of 3rd resistor R3, one end of the 4th resistance R4, one end access of one end of the 5th resistance R5 and the 6th resistance R5 are straight
Galvanic electricity source VDD；The other end of 3rd resistor R3 connects the first output end of the second double flat weighing apparatus switching stage 4, and the 4th resistance R4's is another
One end connects the second output terminal of the second double flat weighing apparatus switching stage 4, the other end connection third double flat weighing apparatus switching stage 5 of the 5th resistance R5
The first output end, the 6th resistance R5 the other end connection third double flat weighing apparatus switching stage 5 second output terminal.
Cooperate shown in Fig. 5, in the embodiment of the present invention two, the multiphase filter 7 includes eleventh resistor R11, the tenth
Two resistance R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance
R17, the 18th resistance R18, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the tenth
Capacitor C10, the 11st capacitor C11 and the 12nd capacitor C12；Wherein eleventh resistor R11 resistance value and the 5th capacitor C5 capacitance
Product, the product of twelfth resistor R12 resistance value and the 6th capacitor C6 capacitance, thirteenth resistor R13 resistance value and the 7th capacitor
The product of C7 capacitance and the 14th resistance R14 resistance value are identical as the product of the 8th capacitor C8 capacitance, the 15th resistance R15
The product of resistance value and the 9th capacitor C9 capacitance, the product of the 16th resistance R16 resistance value and the tenth capacitor C10 capacitance, the tenth
The product and the 18th resistance R18 resistance value and the 12nd capacitor C12 of seven resistance R17 resistance values and the 11st capacitor C11 capacitance
The product of capacitance is identical；One end of eleventh resistor R11 connects the of the multiphase filter 7 with one end of the 5th capacitor C5
One input terminal, one end of twelfth resistor R12 and one end of the 6th capacitor C6 connect the third input of the multiphase filter 7
End, one end of thirteenth resistor R13 connect the second input terminal of the multiphase filter 7 with one end of the 7th capacitor C7, and the tenth
One end of four resistance R14 connects the 4th input terminal of the multiphase filter 7 with one end of the 8th capacitor C8；Eleventh resistor
One end, one end of the 9th capacitor C9 and the other end of the 8th capacitor C8 of the 15th resistance R15 of other end connection of R11, the tenth
The other end of two resistance R12 connects the another of one end of the 16th resistance R16, one end of the tenth capacitor C10 and the 5th capacitor C5
End, the other end of thirteenth resistor R13 connect one end of the 17th resistance R17, one end of the 11st capacitor C11 and the 6th capacitor
The other end of C6, the other end of the 14th resistance R14 connect one end of the 18th resistance R18, the 12nd capacitor C12 one end and
The other end of 7th capacitor C7；The other end of 15th resistance R15 and the other end of the 12nd capacitor C12 connect the multiphase filter
First output end of wave device 7；The other end of 16th resistance R16 connects the other end of the 9th capacitor C9；17th resistance R17's
The other end of the other end and the tenth capacitor C10 connect the second output terminal of the multiphase filter 7；18th resistance R18's is another
One end connects the other end of the 11st capacitor C11.The multiphase filter 7 is led using the positive frequency based on Hilbert transform
Bandpass filter, multiphase filter 7 are different to the response of the signal of out of phase sequence, and positive frequency signal can be made to pass through, and
So that negative frequency is inhibited, to realize the inhibition to image signal, the multiphase filter 7 may be constructed two rank nets
Network reaches enough bandwidth of rejection and inhibits image signal so as in negative frequency or positive frequency realize two traps.
Cooperate shown in Fig. 5, the multiphase filter includes secondary filter network, and first order filter network includes eleventh resistor R11, the
12 resistance R12, thirteenth resistor R13, the 14th resistance R14, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7 and
Eight capacitor C8, wherein the common end of eleventh resistor R11 and the 8th capacitor C8, twelfth resistor R12 and the 5th capacitor C5 public affairs
End, thirteenth resistor R13 and the common end of the 6th capacitor C6 and the common end of the 14th resistance R14 and the 7th capacitor C7 are altogether
Four output nodes of first order filter network；Second level filter network includes the 15th resistance R15, the 16th resistance R16, the
17 resistance R17, the 18th resistance R18, the 9th capacitor C9, the tenth capacitor C10, the 11st capacitor C11 and the 12nd capacitor
C12, wherein the first signal 101 to signal 104 is the output of four phase of the multiphase filter first order, and the 15th resistance R15 and the tenth
The common end of two capacitor C12, the 16th resistance R16 and the 9th capacitor C9 common end, the 17th resistance R17 and the tenth capacitor
The common end of C10 and the common end of the 18th resistance R18 and the 11st capacitor C11 are four outputs of second level filter network
Node chooses the output signal and the 17th resistance R17 and the tenth of the common end of the 15th resistance R15 and the 12nd capacitor C12
The output signal signal of the common end of capacitor C10 is exported as final difference voltage intermediate frequency signal IF+, IF-, wherein every first-level filtering
The resistance value and capacitance of wave network are chosen by following formula:
fIF=1/ (2 π RC)
Wherein fIFFor the image frequency that the needs of every level-one filter network inhibit, R is each electricity of every level-one filter network
The resistance value of resistance, C are the capacitance of each capacitor of every level-one filter network；The value of the R and C of filter networks at different levels need to only expire
Sufficient RC product is certain.
In the embodiment of the present invention two, pass through the first double flat weighing apparatus switching stage 3, the second double flat weighing apparatus switching stage 4 and third double flat
Weighing apparatus switching stage 5 can be realized to be mixed twice, and the frequency of final difference voltage intermediate frequency signal IF+, IF- of output are equal to radio-frequency differential electricity
The frequency that the frequency of pressure input signal RF+, RF- subtracts first difference local oscillation signal L01+, L01- subtracts the second difference local oscillator again
The frequency of signal L02+, L02- or third difference local oscillation signal L03+, L03-, reduce to the first difference local oscillation signal L01+,
The frequency requirement of L01-, second difference local oscillation signal L02+, L02- and third difference local oscillation signal L03+, L03-, so that first
Difference local oscillation signal L01+, L01-, second difference local oscillation signal L02+, L02- and third difference local oscillation signal L03+, L03-'s
Frequency may be located remotely from the frequency of radio-frequency differential voltage input signal RF+, RF-, can be reduced in this way for providing the first difference sheet
The local vibration source of vibration signal LO1+, LO1-, second difference local oscillation signal LO2+, LO2- and third difference local oscillation signal LO3+, LO3-
Circuit design difficulty and power consumption enable a kind of double flat weighing apparatus active mixer of the present embodiment to improve conversion gain, reduce noise
Coefficient simultaneously improves the linearity.In the present embodiment, the construction of transconductance stage 1 and the first double flat weighing apparatus switching stage 3 forms general double flat
Weigh active mixer, although the reduction of first difference local oscillation signal L01+, L01- so that radio-frequency differential voltage input signal RF+,
The influence of the clutter or thermal noise of the image frequency of RF- can be ignored, but for the first difference current intermediate frequency signal IF1
+, IF1- the second double flat weigh switching stage 4 and third double flat weighing apparatus switching stage 5 in image frequency clutter or need to consider.Together
Sample by taking the satellite TV system of general Ku wave band as an example, the low-band frequency of radio-frequency differential voltage input signal RF+, RF- are
10.7GHz~11.7GHz, high-band frequencies be 11.7GHz~12.75GHz, the final difference voltage intermediate frequency signal IF+ of output,
IF- low-band frequency is 0.95GHz~1.95GHz, and high-band frequencies are 1.1GHz~2.15GHz；Wherein radio-frequency differential voltage
When input signal RF+, RF- is low band, first difference local oscillation signal L01+, L01-, second difference local oscillation signal L02+, L02-
The 4.875GHz set with the frequency of third difference local oscillation signal L03+, L03-；Radio-frequency differential voltage input signal RF+, RF- are
First difference local oscillation signal L01+, L01-, second difference local oscillation signal L02+, L02- and third difference local oscillation signal when high band
The frequency of L03+, L03- are set as 5.3GHz, then, in low band, the frequency of first difference current intermediate frequency signal IF1+, IF1-
Rate be 5.825GHz~6.825GHz, the mirror image frequency range of first difference current intermediate frequency signal IF1+, IF1- be then 2.925GHz~
3.925GHz；In high band, the frequency of first difference current intermediate frequency signal IF1+, IF1- is 6.4GHz~7.45GHz, first
The mirror image frequency range of difference current intermediate frequency signal IF1+, IF1- are then 3.15GHz~4.2GHz；So in the movement of low band,
The clutter and thermal noise of 7.8GHz~8.8GHz frequency range in radio-frequency differential voltage input signal RF+, RF- are weighed by the first double flat
Image signal when switching stage 3 is then mixed as the second double flat weighing apparatus switching stage 4 and third double flat weighing apparatus switching stage 5 after being mixed；
In the movement of high band, the clutter and heat of 8.45GHz~9.5GHz frequency range in radio-frequency differential voltage input signal RF+, RF-
First double flat that noise passes through, which weighs, then becomes the second double flat weighing apparatus switching stage 4 after switching stage 3 is mixed and third double flat weighing apparatus switching stage 5 carries out
Image signal when mixing；And the second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5 and multiphase filter 7 may make up mirror image
Inhibit frequency mixer, by 7 second difference voltage intermediate frequency signal IF2 ' of multiphase filter+, IF2 '-and third difference voltage of intermediate frequency believe
Number IF3 '+, the image signal in IF3 '-, so as to effectively remove the second double flat weighing apparatus switching stage 4 and third double flat weighing apparatus switching stage
5 image signal when being mixed so that a kind of double flat weighing apparatus active mixer of the present embodiment have lower noiseproof feature and
Higher receptivity.
It should be noted that transconductance stage 1, the first double flat weighing apparatus switching stage 3 in the embodiment of the present invention two, the second double flat weighing apparatus are opened
Range involved in pass grade 4, third double flat weighing apparatus switching stage 5, load stage 2 and multiphase filter 7 is including but not limited to shown in fig. 5
Circuit theory legend；It is all meet the invention is intended to transconductance stage circuit, switching stage circuit and load stage circuit and combinations thereof all
It belongs to the scope of protection of the present invention；It is all meet the invention is intended to multiphase filter construction, including can achieve same mirror
As inhibiting the electrical combination of the complex filter construction of function to all belong to the scope of protection of the present invention.
Embodiment three:
As shown in fig. 6, in the embodiment of the present invention three, a kind of double flat weighing apparatus active mixer, including transconductance stage 1, first pair
Balance cock grade 3, the second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5, the 4th double flat weighing apparatus switching stage 6, load stage 2 and more
Phase filter 7；Wherein the transconductance stage 1 is for receiving radio-frequency differential voltage input signal RF+, RF- and by radio-frequency differential voltage
Input signal RF+, RF- is converted to radio-frequency differential current signal rf+, rf- output；The first of the first double flat weighing apparatus switching stage 3
Input terminal and the second input terminal are connected with the first output end and second output terminal of transconductance stage 1 respectively, the first double flat weighing apparatus switching stage 3
It is poor that first is generated for first difference local oscillation signal LO1+, LO1- and radio-frequency differential current signal rf+, rf- to be mixed
Divide current intermediate frequency signal IF1+, IF1- output；The first input end and the second input terminal difference of the third double flat weighing apparatus switching stage 5
It is connected with the first output end and second output terminal of transconductance stage 1, third double flat weighing apparatus switching stage 5 is used for third difference local oscillation signal
LO3+, LO3- and radio-frequency differential current signal rf+, rf- are mixed and generate third difference current intermediate frequency signal IF3+, IF3-
Output；The first output end and second output terminal of first double flat weighing apparatus switching stage 3 respectively with third double flat weighing apparatus switching stage 5 the
One output end is connected with second output terminal, so that first difference current intermediate frequency signal IF1+, IF1- and third difference electric current of intermediate frequency
Signal IF3+, IF3- are vector superposed to form differential current intermediate frequency signal IF0+, IF0-, wherein the first difference current intermediate frequency signal
IF1+, IF1- be identical with third difference current intermediate frequency signal IF3+, IF3- frequency and quadrature in phase, and current intermediate frequency signal IF0
+, IF0- frequency and first difference current intermediate frequency signal IF1+, IF1- and third difference current intermediate frequency signal IF3+, IF3- frequency
The identical function to realize orthogonal signalling vector addition；The first input end of second double flat weighing apparatus switching stage 4 and second defeated
Enter end to be connected with the first output end of the first double flat weighing apparatus switching stage 3 and second output terminal respectively, the second double flat weighing apparatus switching stage 4 is used for
Second difference local oscillation signal LO2+, LO2- is mixed with current intermediate frequency signal IF0+, IF0- and generates the second difference intermediate frequency
Current signal IF2+, IF2- output；The first input end and the second input terminal of 4th double flat weighing apparatus switching stage 6 respectively with third
First output end of double flat weighing apparatus switching stage 5 is connected with second output terminal, and the 4th double flat weighing apparatus switching stage 6 is used for the 4th difference local oscillator
Signal LO4+, LO4- be mixed with current intermediate frequency signal IF0+, IF0- and generate the 4th difference current intermediate frequency signal IF4+,
IF4- output；The frequency of first differential intermediate frequency LO1+, LO1-, the second differential intermediate frequency frequency LO2+, LO2-,
The frequency of third difference local oscillation signal LO3+, LO3- are identical with phase with the frequency of the 4th difference local oscillation signal LO4+, LO4-；Institute
State load stage 2 and the second double flat weighing apparatus switching stage 4 the first output end and second output terminal and the 4th double flat weighing apparatus switching stage 6 the
One output end and second output terminal are respectively connected with, and load stage 2 is used for second difference current intermediate frequency signal IF2+, IF2- and the 4th
Difference current intermediate frequency signal IF4+, IF4- be converted to the second difference voltage intermediate frequency signal IF2 '+, IF2 '-and the 4th difference intermediate frequency
Voltage signal IF4 '+, IF4 '-output；First to fourth input terminal of the multiphase filter 7 respectively with second pair of balance cock
First output end of grade 4 is connected with the first output end of second output terminal and the 4th double flat weighing apparatus switching stage 6 with second output terminal,
Multiphase filter 7 for filter out the second difference voltage intermediate frequency signal IF2 '+, IF2 '-and the 4th difference voltage intermediate frequency signal IF4 '
+, the image signal in IF4 '-and selection filter out the second difference voltage intermediate frequency signal and the 4th difference medium frequency electric after image signal
One of signal is pressed to export as final difference voltage intermediate frequency signal IF+, IF-.
In the embodiment of the present invention three, weighed by the first double flat weighing apparatus switching stage 3, the second double flat weighing apparatus switching stage 4, third double flat
Switching stage 5 and the 4th double flat weighing apparatus switching stage 6 can realize and be mixed twice, final difference voltage intermediate frequency signal IF+, IF-'s of output
Frequency of the frequency equal to radio-frequency differential voltage input signal RF+, RF- subtracts twice first difference local oscillation signal LO1+, LO1-
Frequency, reduce to first difference local oscillation signal LO1+, LO1-, second difference local oscillation signal LO2+, LO2-, third difference sheet
The frequency requirement of vibration signal LO3+, LO3- and the 4th difference local oscillation signal LO4+, LO4-, so that the first difference local oscillation signal LO1
+, LO1-, second difference local oscillation signal LO2+, LO2-, third difference local oscillation signal LO3+, LO3- and the 4th difference local oscillation signal
The frequency of LO4+, LO4- may be located remotely from the frequency of radio-frequency differential voltage input signal RF+, RF-, can reduce for providing in this way
First difference local oscillation signal LO1+, LO1-, second difference local oscillation signal LO2+, LO2-, third difference local oscillation signal LO3+, LO3-
With the local vibration source circuit design difficulty and power consumption of the 4th difference local oscillation signal LO4+, LO4- so that the one of the embodiment of the present invention three
Kind double flat weighing apparatus active mixer can improve conversion gain, noise-reduction coefficient and improve the linearity.
Image signal suppression when in addition to effectively improve the second double flat weighing apparatus switching stage 4 and the weighing apparatus mixing of switching stage 6 of the 4th double flat
The phase error and amplitude of ability processed, second difference local oscillation signal LO2+, LO2- and the 4th difference local oscillation signal LO4+, LO4- are missed
Difference wants as small as possible, so for receiving the signal wire and the of the second difference local oscillation signal LO2+ on the second double flat weighing apparatus switching stage 4
It requires impedance the same for receiving the signal wire of the 4th difference local oscillation signal LO4+, LO4- on four double flats weighing apparatus switching stage 6, and is
First difference local oscillation signal LO1+, LO1-, second difference local oscillation signal LO2+, LO2-, third difference local oscillation signal LO3+,
LO3- and the 4th difference local oscillation signal LO4+, LO4- can be provided by same local oscillator source circuit, therefore the first double flat weighing apparatus switching stage
3, same construction can be used in the second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5 and the 4th double flat weighing apparatus switching stage 6；In this way
It can ensure on the second double flat weighing apparatus switching stage 4 for receiving the signal wire and the 4th double flat weighing apparatus of the second difference local oscillation signal LO2+
It is equally completely the same for receiving the signal wire requirement impedance of the 4th difference local oscillation signal LO4+, LO4- on switching stage 6, and can be with
Share a local oscillator source circuit without cause second difference local oscillation signal LO2+, LO2- and the 4th difference local oscillation signal LO4+,
The phase deviation and amplitude excursion of LO4-, it is ensured that the image signal of the second double flat weighing apparatus switching stage 4 and the 4th double flat weighing apparatus switching stage 6
Rejection.Specifically, in the embodiment of the present invention three, the first double flat weighing apparatus switching stage 3 includes third shown in cooperation Fig. 7
Metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4, the 5th metal-oxide-semiconductor M5 and the 6th metal-oxide-semiconductor M6；The source electrode of third metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4's
Source electrode connects the first input end of the first double flat weighing apparatus switching stage 3, and the source electrode of the 5th metal-oxide-semiconductor M5 and the source electrode of the 6th metal-oxide-semiconductor M6 connect
Connect the second input terminal of the first double flat weighing apparatus switching stage 3；The grid access first of the grid and the 6th metal-oxide-semiconductor M6 of third metal-oxide-semiconductor M3
The grid of the positive signal LO1+, the 4th metal-oxide-semiconductor M4 of difference local oscillation signal and the grid of the 5th metal-oxide-semiconductor M5 access the first difference local oscillator
The negative signal LO1- of signal；Drain electrode connection the first double flat weighing apparatus switching stage 3 of the drain electrode and the 5th metal-oxide-semiconductor M5 of third metal-oxide-semiconductor M3
Second output terminal, the second of drain electrode connection the first double flat weighing apparatus switching stage 3 of the drain electrode and the 6th metal-oxide-semiconductor M6 of the 4th metal-oxide-semiconductor M4 are defeated
Outlet；The second double flat weighing apparatus switching stage 4 includes the 7th metal-oxide-semiconductor M7, the 8th metal-oxide-semiconductor M8, the 9th metal-oxide-semiconductor M9 and the tenth metal-oxide-semiconductor
M10；The source electrode of 7th metal-oxide-semiconductor M7 and the source electrode of the 8th metal-oxide-semiconductor M8 connect the first input end of the second double flat weighing apparatus switching stage 4, the
The source electrode of nine metal-oxide-semiconductor M9 and the source electrode of the tenth metal-oxide-semiconductor M10 connect the second input terminal of the second double flat weighing apparatus switching stage 4；7th MOS
The grid of the grid of pipe M7 and the tenth metal-oxide-semiconductor M10 access the positive signal LO2+ of the second difference local oscillation signal, the 8th metal-oxide-semiconductor M8's
The grid of grid and the 9th metal-oxide-semiconductor M9 access the negative signal LO2- of the second difference local oscillation signal；The drain electrode of 7th metal-oxide-semiconductor M7 and
First output end of drain electrode connection the second double flat weighing apparatus switching stage 4 of nine metal-oxide-semiconductor M9, the drain electrode of the 8th metal-oxide-semiconductor M8 and the tenth metal-oxide-semiconductor
The second output terminal of drain electrode connection the second double flat weighing apparatus switching stage 4 of M10；The third double flat weighing apparatus switching stage 5 includes the 11st MOS
Pipe M11, the 12nd metal-oxide-semiconductor M12, the 13rd metal-oxide-semiconductor M13 and the 14th metal-oxide-semiconductor M14；The source electrode of 11st metal-oxide-semiconductor M11 and
The first input end of the source electrode connection third double flat weighing apparatus switching stage 5 of 12 metal-oxide-semiconductor M12, the source electrode of the 13rd metal-oxide-semiconductor M13 and the
Second input terminal of the source electrode connection third double flat weighing apparatus switching stage 5 of 14 metal-oxide-semiconductor M14；The grid of 11st metal-oxide-semiconductor M11 and
The positive signal LO3+ of the grid access third difference local oscillation signal of 14 metal-oxide-semiconductor M14, the grid and the tenth of the 12nd metal-oxide-semiconductor M12
The negative signal LO3- of the grid access third difference local oscillation signal of three metal-oxide-semiconductor M13；The drain electrode and the 13rd of 11st metal-oxide-semiconductor M11
The second output terminal of the drain electrode connection third double flat weighing apparatus switching stage 5 of metal-oxide-semiconductor M13, the drain electrode and the 14th of the 12nd metal-oxide-semiconductor M12
The second output terminal of the drain electrode connection third double flat weighing apparatus switching stage 5 of metal-oxide-semiconductor M14；The 4th double flat weighing apparatus switching stage 6 includes the tenth
Five metal-oxide-semiconductor M15, the 16th metal-oxide-semiconductor M16, the 17th metal-oxide-semiconductor M17 and the 18th metal-oxide-semiconductor M18；The source electrode of 15th metal-oxide-semiconductor M15
The first input end of the 4th double flat weighing apparatus switching stage 6, the source electrode of the 17th metal-oxide-semiconductor M17 are connected with the source electrode of the 16th metal-oxide-semiconductor M16
The second input terminal of the 4th double flat weighing apparatus switching stage 6 is connected with the source electrode of the 18th metal-oxide-semiconductor M18；The grid of 15th metal-oxide-semiconductor M15
Access the positive signal LO4+ of the second difference local oscillation signal with the grid of the 18th metal-oxide-semiconductor M18, the grid of the 16th metal-oxide-semiconductor M16 and
The grid of 17th metal-oxide-semiconductor M17 accesses the negative signal LO4- of the 4th difference local oscillation signal；The drain electrode of 15th metal-oxide-semiconductor M15 and
The second output terminal of drain electrode connection the 4th double flat weighing apparatus switching stage 6 of 17 metal-oxide-semiconductor M17, the drain electrode of the 16th metal-oxide-semiconductor M16 and the
The second output terminal of drain electrode connection the 4th double flat weighing apparatus switching stage 6 of 18 metal-oxide-semiconductor M18.
In the embodiment of the present invention three, the first output end and the double balance cocks of third of the first double flat weighing apparatus switching stage 3
The second inductance L2, such second inductance L2 is parallel between the second output terminal of grade 5 can be with the output of the first double flat weighing apparatus switching stage 3
Hold the input terminal and the of the parasitic capacitance and the second double flat weighing apparatus switching stage 4 between the output end of third double flat weighing apparatus switching stage 5
Parasitic capacitance between the output end of four double flats weighing apparatus switching stage 6 generates resonance and eliminates influence of the parasitic capacitance to circuit performance,
To improve the conversion benefit and noiseproof feature of a kind of double flat weighing apparatus active mixer frequency mixer of the present embodiment.
The embodiment of the present invention three is applied when multichannel is mixed in integrated chip, all the way the first difference local oscillation signal of frequency mixer
LO1+, LO1-, second difference local oscillation signal LO2+, LO2-, third difference local oscillation signal LO3+, LO3- and the 4th difference local oscillator letter
The frequency of number LO4+, LO4- may be located remotely from the frequency of road frequency mixer radio-frequency differential voltage input signal RF+, RF-, the first difference
Local oscillation signal LO1+, LO1-, second difference local oscillation signal LO2+, LO2-, third difference local oscillation signal LO3+, LO3- and the 4th are poor
The frequency for dividing local oscillation signal LO4+, LO4- to leak into the spurious signal generated in another way frequency mixer can be mixed far from the another way
The frequency of final voltage intermediate frequency signal IF+, IF- that device needs, avoid spurious signal to the receptivity of another way frequency mixer
Influence.In a kind of double flat weighing apparatus active mixer of the embodiment of the present invention three, the second double flat weighing apparatus switching stage 4, the 4th double flat weighing apparatus
Switching stage 6 and multiphase filter 7 constitute image-reject mixer, and the first double flat weighing apparatus switching stage 3 is effectively inhibited to be formed in mixing
Ratio the second difference local oscillation signal LO2+, LO2- and the 4th lower low-frequency range of difference local oscillation signal LO4+, LO4- frequency it is spuious
Ratio the second difference local oscillation signal LO2+, LO2- and the 4th difference that signal and third double flat weighing apparatus switching stage 5 are formed in mixing
The lower low-frequency range spurious signal of local oscillation signal LO4+, LO4- frequency is in the second double flat weighing apparatus switching stage 4 and the 4th pair of balance cock
Grade 6 is mixed, and is reduced a kind of spuious and noise of double flat weighing apparatus active mixer frequency mixer itself of this implementation, is improved and connect
The performance of receipts.
Cooperate shown in Fig. 8, in the connecting structure and the embodiment of the present invention two of the multiphase filter 7 in the embodiment of the present invention three
Multiphase filter 7 is identical.Wherein the multiphase filter 7 in the embodiment of the present invention three includes eleventh resistor R11, twelfth resistor
R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance R17,
18 resistance R18, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor
C10, the 11st capacitor C11 and the 12nd capacitor C12；Wherein eleventh resistor R11 resistance value and the 5th capacitor C5 capacitance multiply
Product, the product of twelfth resistor R12 resistance value and the 6th capacitor C6 capacitance, thirteenth resistor R13 resistance value and the 7th capacitor C7 electricity
The product of capacitance and the 14th resistance R14 resistance value are identical as the product of the 8th capacitor C8 capacitance, the 15th resistance R15 resistance value
With the product, the product of the 16th resistance R16 resistance value and the tenth capacitor C10 capacitance, the 17th electricity of the 9th capacitor C9 capacitance
The product and the 18th resistance R18 resistance value and the 12nd capacitor C12 capacitor of resistance R17 resistance value and the 11st capacitor C11 capacitance
The product of value is identical；One end of eleventh resistor R11 with that one end of the 5th capacitor C5 connects the multiphase filter 7 is first defeated
Entering end, one end of twelfth resistor R12 connects the third input terminal of the multiphase filter 7 with one end of the 6th capacitor C6, the
One end of 13 resistance R13 connects the second input terminal of the multiphase filter 7, the 14th resistance with one end of the 7th capacitor C7
One end of R14 connects the 4th input terminal of the multiphase filter 7 with one end of the 8th capacitor C8；Eleventh resistor R11's is another
One end connects one end, one end of the 9th capacitor C9 and the other end of the 8th capacitor C8 of the 15th resistance R15, twelfth resistor
One end, one end of the tenth capacitor C10 and the other end of the 5th capacitor C5 of the 16th resistance R16 of other end connection of R12, the tenth
The other end of three resistance R13 connects the another of one end of the 17th resistance R17, one end of the 11st capacitor C11 and the 6th capacitor C6
One end, the other end of the 14th resistance R14 connect one end of the 18th resistance R18, one end of the 12nd capacitor C12 and the 7th electricity
Hold the other end of C7；The other end of 15th resistance R15 and the other end of the 12nd capacitor C12 connect the multiphase filter 7
The first output end；The other end of 16th resistance R16 connects the other end of the 9th capacitor C9；17th resistance R17's is another
End connects the second output terminal of the multiphase filter 7 with the other end of the tenth capacitor C10；The other end of 18th resistance R18
Connect the other end of the 11st capacitor C11.The multiphase filter 7 is using the positive frequency conducting filter based on Hilbert transform
Wave device, multiphase filter 7 are different to the response of the signal of out of phase sequence, and positive frequency signal can be made to pass through, and make
Negative frequency is inhibited, to realize the inhibition to image signal, the multiphase filter 7 may be constructed two rank networks, from
And two traps can be realized in negative frequency or positive frequency to reach enough bandwidth of rejection and inhibit image signal.Cooperation figure
Shown in 8, the multiphase filter includes secondary filter network, and first order filter network includes eleventh resistor R11, the 12nd electricity
Hinder R12, thirteenth resistor R13, the 14th resistance R14, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7 and the 8th capacitor
C8, the wherein common end of eleventh resistor R11 and the 8th capacitor C8, the common end of twelfth resistor R12 and the 5th capacitor C5,
The common end of 13 resistance R13 and the 6th capacitor C6 and the common end of the 14th resistance R14 and the 7th capacitor C7 are the first order
Four output nodes of filter network；Second level filter network includes the 15th resistance R15, the 16th resistance R16, the 17th electricity
R17, the 18th resistance R18, the 9th capacitor C9, the tenth capacitor C10, the 11st capacitor C11 and the 12nd capacitor C12 are hindered, wherein
First signal 101 to signal 104 is the output of four phase of the multiphase filter first order, and the 15th resistance R15 and the 12nd capacitor C12
Common end, the common end of the 16th resistance R16 and the 9th capacitor C9, the 17th resistance R17 and the tenth capacitor C10 common end
And the 18th resistance R18 and the 11st capacitor C11 common end be second level filter network four output nodes, choose the
The output signal of the common end of 15 resistance R15 and the 12nd capacitor C12 and the public affairs of the 17th resistance R17 and the tenth capacitor C10
The output signal signal held altogether is exported as final difference voltage intermediate frequency signal IF+, IF-, wherein the electricity of every level-one filter network
Resistance value and capacitance are chosen by following formula:
fIF=1/ (2 π RC)
Wherein fIFFor the image frequency that the needs of every level-one filter network inhibit, R is each electricity of every level-one filter network
The resistance value of resistance, C are the capacitance of each capacitor of every level-one filter network；The value of the R and C of filter networks at different levels need to only expire
Sufficient RC product is certain.
In the embodiment of the present invention three, can be parallel between the first output end and second output terminal of the transconductance stage 1
One inductance L1, the parasitic capacitance between such first inductance L1 meeting and the first output end and second output terminal of transconductance stage 1 generate
Resonance and eliminate influence of the parasitic capacitance to circuit performance, so that a kind of double flat weighing apparatus active mixer for improving the present embodiment is mixed
The conversion benefit and noiseproof feature of frequency device.Cooperate shown in Fig. 7, in the embodiment of the present invention three, the transconductance stage 1 includes first
Metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, first resistor R1 and second resistance R2；The wherein grid of the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2
Grid be separately connected the first input end and the second input terminal of the transconductance stage 1；The drain electrode of first metal-oxide-semiconductor M1 and the 2nd MOS
The drain electrode of pipe M2 is separately connected the first output end and second output terminal of the transconductance stage 1；The source electrode connection the of first metal-oxide-semiconductor M1
One end of one resistance R1, one end of the source electrode connection second resistance R2 of the second metal-oxide-semiconductor M2, the other end of first resistor R1 and second
The other end of resistance R2 is grounded.And it should be noted that the first resistor R1 and second resistance R2 of transconductance stage 1 can also use capacitor,
Inductance or their combination replace.
In the embodiment of the present invention three, cooperate Fig. 7 shown in, the load stage 2 include 3rd resistor R3, the 4th resistance R4,
5th resistance R5 and the 6th resistance R5；The resistance value phase of 3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R5
Together；One end of 3rd resistor R3, one end of the 4th resistance R4, one end access of one end of the 5th resistance R5 and the 6th resistance R5 are straight
Galvanic electricity source VDD；The other end of 3rd resistor R3 connects the first output end of the second double flat weighing apparatus switching stage 4, and the 4th resistance R4's is another
One end connects the second output terminal of the second double flat weighing apparatus switching stage 4, and the other end of the 5th resistance R5 connects the 4th double flat weighing apparatus switching stage 6
The first output end, the other end of the 6th resistance R5 connects the second output terminal of the 4th double flat weighing apparatus switching stage 6.It needs to illustrate
That 3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 of the load stage 2 can also use capacitor, inductance or
Person's their combination replaces, to adjust a kind of frequency characteristic of the double flat weighing apparatus active mixer of the present embodiment, other load stage 2
Resistance the pipe of common-mode feedback can also be used replaced.
In the embodiment of the present invention three, the first input end and the second input terminal of the multiphase filter 7 pass through respectively
The first output end and second output terminal phase of one intermediate-frequency strip 8 and the second intermediate-frequency strip 9 and the second double flat weighing apparatus switching stage 4
Even, the third input terminal and the 4th input terminal of the multiphase filter 7 pass through third intermediate-frequency strip 10 and the 4th intermediate frequency respectively
Amplifying stage 11 is connected with the first output end of the 4th double flat weighing apparatus switching stage 6 and second output terminal, first passes through the first intermediate frequency in this way and puts
Big grade 8, the second intermediate-frequency strip 9, third intermediate-frequency strip 10 and the 4th intermediate-frequency strip 11 believe the second difference voltage of intermediate frequency
Number IF2 '+, IF2 '-and third difference voltage intermediate frequency signal IF3 '+, IF3 '-amplify, then passing through multiphase filter 7
Filter out amplified second difference voltage intermediate frequency signal IF2 "+, IF2 "-and amplified third difference voltage intermediate frequency signal IF3 "
+, the image signal in IF3 "-, and choose and filter out the second difference voltage intermediate frequency signal and third difference intermediate frequency after image signal
One of voltage signal is exported as final difference voltage intermediate frequency signal IF+, IF-.Cooperate shown in Fig. 7, wherein described the
One intermediate-frequency strip 8 includes the 8th resistance R8, the second capacitor C2, the 21st metal-oxide-semiconductor M21 pipe and the 22nd metal-oxide-semiconductor M22；
Second intermediate-frequency strip 9 includes the 7th resistance R7, first capacitor C1, the 19th metal-oxide-semiconductor M19 and the 20th metal-oxide-semiconductor M20；
The third intermediate-frequency strip 10 includes the tenth resistance R10, the 4th capacitor C4, the 25th metal-oxide-semiconductor M25 and the 26th MOS
Pipe M26；4th intermediate-frequency strip 11 includes the 9th resistance R9, third capacitor C3, the 23rd metal-oxide-semiconductor M23 and the 20th
Four metal-oxide-semiconductor M24；Wherein the source electrode of the 19th metal-oxide-semiconductor M19 accesses DC power supply VDD, the drain electrode connection the of the 19th metal-oxide-semiconductor M19
Drain electrode, one end of the 7th resistance R7 and the second input terminal of multiphase filter 7 of 20 metal-oxide-semiconductor M20, the 19th metal-oxide-semiconductor M19's
Grid connects the other end, the grid of the 20th metal-oxide-semiconductor M20 and one end of first capacitor C1 of the 7th resistance R7, first capacitor C1
The other end connect the second balance cock grade 4 second output terminal；The source electrode of 21st metal-oxide-semiconductor M21 accesses DC power supply, the
The drain electrode of the 22nd metal-oxide-semiconductor M22 of drain electrode connection, one end of the 8th resistance R8 and the multiphase filter 7 of 21 metal-oxide-semiconductor M21
First input end, the grid of the 21st metal-oxide-semiconductor M21 connects the other end of the 8th resistance R8, the 22nd metal-oxide-semiconductor M22
One end of grid and the second capacitor C2, the other end of the second capacitor C2 connect the first output end of the second balance cock grade 4；Second
The source electrode of ten metal-oxide-semiconductor M20 and the source electrode of the 22nd metal-oxide-semiconductor M22 are taken out by the center that eleventh resistor connects the first inductance L1
Head and make the first intermediate-frequency strip 8, the tail current of the second intermediate-frequency strip 9 can converge to the centre cap of the first inductance L1,
One end of eleventh resistor connects the source electrode of the 20th metal-oxide-semiconductor M20 and the source electrode of the 22nd metal-oxide-semiconductor M22, eleventh resistor
The other end connects the centre cap of the first inductance L1；The source electrode of 23rd metal-oxide-semiconductor M23 accesses DC power supply VDD, and the 23rd
Drain electrode, one end of the 9th resistance R9 and the third of multiphase filter 7 of the 24th metal-oxide-semiconductor M24 of drain electrode connection of metal-oxide-semiconductor M23
Input terminal, the grid of the 23rd metal-oxide-semiconductor M23 connect the other end of the 9th resistance R9, the 24th metal-oxide-semiconductor M24 grid and
One end of third capacitor C3, the first output end of the 4th balance switching stage 6 of other end connection of third capacitor C3；25th
The source electrode of metal-oxide-semiconductor M25 accesses DC power supply VDD, the leakage of the 26th metal-oxide-semiconductor M26 of drain electrode connection of the 25th metal-oxide-semiconductor M25
4th input terminal of pole, one end of the tenth resistance R10 and multiphase filter 7, the grid connection the tenth of the 25th metal-oxide-semiconductor M25
The other end of one end of the other end of resistance R10, the grid of the 26th metal-oxide-semiconductor M26 and the 4th capacitor C4, the 4th capacitor C4 connects
Connect the second output terminal of the 4th balance switching stage 6；The source electrode of 24th metal-oxide-semiconductor M24 and the source electrode of the 26th metal-oxide-semiconductor M26
Make third intermediate-frequency strip 10, the 4th intermediate-frequency strip 11 by the centre cap that twelfth resistor connects the first inductance L1
Tail current can converge to the centre cap of the first inductance L1, one end of twelfth resistor connects the source of the 24th metal-oxide-semiconductor M24
The source electrode of pole and the 26th metal-oxide-semiconductor M26, the other end of twelfth resistor connect the centre cap of the first inductance L1.In first
Frequency amplifying stage 8, the second intermediate-frequency strip 9, third intermediate-frequency strip 10 and the 4th intermediate-frequency strip 11 tail current can converge to
The centre cap of first inductance L1, is able to achieve the multiplexing of electric current, to reduce the power consumption of circuit.
The switching stage in this embodiment it is assumed that the first double flat weighing apparatus switching stage 3, the second double flat weighing apparatus switching stage 4, third double flat weigh
5 and the 4th the double flat weighing apparatus work of switching stage 6 in ideal switch motion state, then a kind of double flat of the present embodiment weighs active mixer
Voltage conversion gain AvIt can be calculated with following formula:
Av=[2 (gm)2Rp]/π
Wherein, gmFor the mutual conductance of the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2, Rp3rd resistor R3, the 4th electricity for load stage 2
Hinder the resistance value of R4, the 5th resistance R5 and the 6th resistance R6.From the above equation, we can see that the mutual conductance of transconductance stage 1 is bigger or load stage 2
Resistance it is bigger, then voltage conversion gain of the invention is bigger.So in order to increase the mutual conductance of transconductance stage 1, transconductance stage 1
Then need to flow through biggish tail current, meanwhile, preferable noiseproof feature, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2 are needed in order to obtain
The biggish transistor of amplification factor is used, but if the tail current of transconductance stage 1 is all from the first double flat weighing apparatus switching stage 3, second
The tail current of double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5 and the 4th double flat weighing apparatus switching stage 6, then first pair of balance cock
The transistor of grade the 3, second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5 and the 4th double flat weighing apparatus switching stage 6 is needed with amplification
The biggish pipe of multiple, this will increase the first double flat weighing apparatus switching stage 3, the second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5
With the 4th double flat weighing apparatus switching stage 6 parasitic capacitance, to voltage conversion gain AvFrequency response characteristic impact, in addition first
Double flat weigh switching stage 3, the second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5 and the 4th double flat weighing apparatus switching stage 6 tail current
Power end after the resistance decompression by load stage 2, tail current is big, under certain supply voltage, the of load stage 2
Three resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 cannot select too greatly, to limit load stage 2 in this way
Resistance R3, resistance R4, resistance R5 and resistance R6 range of choice.And the first intermediate-frequency strip 8, the second intermediate-frequency strip 9,
The tail current of three intermediate-frequency strips 10 and the 4th intermediate-frequency strip 11 converges to the centre cap of the first inductance L1, then can make
A pair of balance cock grade 3, the second double flat weighing apparatus switching stage 4, third double flat weighing apparatus switching stage 5 and the 4th double flat weighing apparatus switching stage 6 tail electricity
Stream can be reduced significantly, 3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 of such load stage 2
The resistance of bigger resistance value can also be used, so that the present invention realizes low-noise factor, high conversion gain.
It should be noted that transconductance stage 1, the first double flat weighing apparatus switching stage 3 in the embodiment of the present invention three, the second double flat weighing apparatus are opened
Range involved in pass grade 4, third double flat weighing apparatus switching stage 5 and load stage 2 includes but is not limited to circuit diagram shown in Fig. 7
Example；Range involved in the multiphase filter 7 includes but is not limited to circuit theory legend shown in Fig. 8；It is all to meet this hair
The transconductance stage circuit of bright intention, switching stage circuit and load circuit and combinations thereof belong to the protection model of the embodiment of the present invention three
It encloses；It is all meet the invention is intended to multiphase filter construction, including can achieve same image rejection function plural number filter
The electrical combination of wave device construction belongs to the protection scope of the embodiment of the present invention three；In addition, first in the embodiment of the present invention three
Intermediate-frequency strip 8, the second intermediate-frequency strip 9, third intermediate-frequency strip 10 and the 4th intermediate-frequency strip 11 are to use automatic biasing
Negative voltage feedback amplifying circuit, but the first intermediate-frequency strip 8, the second intermediate-frequency strip 9, third intermediate-frequency strip 10 and
Four intermediate-frequency strips 11 can also use common differential amplifier circuit.
Above-described embodiment and schema and non-limiting product form and style of the invention, any technical field it is common
The appropriate changes or modifications that technical staff does it all should be regarded as not departing from patent category of the invention.
Claims (10)
- The active mixer 1. a kind of double flat weighs, it is characterised in that: including transconductance stage, the first double flat weighing apparatus switching stage, the second double flat weighing apparatus Switching stage and load stage；Wherein the transconductance stage is for receiving radio-frequency differential voltage input signal and being converted to radio-frequency differential voltage input signal The output of radio-frequency differential current signal；The first input end and the second input terminal of first double flat weighing apparatus switching stage respectively with the first output end of transconductance stage, second Output end is connected, the first double flat weighing apparatus switching stage for the first difference local oscillation signal to be mixed with radio-frequency differential current signal and Generate the output of the first difference current intermediate frequency signal；The first input end and the second input terminal of second double flat weighing apparatus switching stage respectively with the first double flat weighing apparatus switching stage first Output end is connected with second output terminal, and the second double flat weighing apparatus switching stage is used for the second difference local oscillation signal and the first difference medium frequency electric Stream signal is mixed and generates final difference current intermediate frequency signal output；The load stage and the first output end and second output terminal of the second double flat weighing apparatus switching stage are respectively connected with, and load stage is used for will Final difference current intermediate frequency signal is converted to final difference voltage intermediate frequency signal output.
- The active mixer 2. a kind of double flat as described in claim 1 weighs, it is characterised in that: the first difference local oscillation signal and The frequency of second difference local oscillation signal is identical as phase.
- The active mixer 3. a kind of double flat weighs, it is characterised in that: including transconductance stage, the first double flat weighing apparatus switching stage, the second double flat weighing apparatus Switching stage, third double flat weighing apparatus switching stage, load stage and multiphase filter；Wherein the transconductance stage is for receiving radio-frequency differential voltage input signal and being converted to radio-frequency differential voltage input signal The output of radio-frequency differential current signal；The first input end and the second input terminal of first double flat weighing apparatus switching stage respectively with the first output end of transconductance stage and the Two output ends are connected, and the first double flat weighing apparatus switching stage is for the first difference local oscillation signal to be mixed with radio-frequency differential current signal And generate the output of the first difference current intermediate frequency signal；The first input end and the second input terminal of second double flat weighing apparatus switching stage respectively with the first double flat weighing apparatus switching stage first Output end is connected with second output terminal, and the second double flat weighing apparatus switching stage is used for the second difference local oscillation signal and the first difference medium frequency electric Stream signal is mixed and generates the output of the second difference current intermediate frequency signal；The first input end and the second input terminal of third double flat weighing apparatus switching stage respectively with the first double flat weighing apparatus switching stage first Output end is connected with second output terminal, and third double flat weighing apparatus switching stage is used for third difference local oscillation signal and the first difference medium frequency electric Stream signal is mixed and generates the output of third difference current intermediate frequency signal, the third differential intermediate frequency and the second difference intermediate frequency Signal frequency is identical and quadrature in phase；The load stage and the first output end and second output terminal and third double flat weighing apparatus of second double flat weighing apparatus switching stage are opened The first output end and second output terminal for closing grade are respectively connected with, and load stage is used for the second difference current intermediate frequency signal and third is poor Current intermediate frequency signal is divided to be converted to the second difference voltage intermediate frequency signal and the output of third difference voltage intermediate frequency signal；First to fourth input terminal of the multiphase filter respectively with the second double flat weighing apparatus switching stage the first output end and second First output end of output end and third double flat weighing apparatus switching stage is connected with second output terminal, and multiphase filter is for filtering out second Difference voltage intermediate frequency signal and image signal in third difference voltage intermediate frequency signal and selection filter out second after image signal One of difference voltage intermediate frequency signal and third difference voltage intermediate frequency signal are exported as final difference voltage intermediate frequency signal.
- The active mixer 4. a kind of double flat as claimed in claim 3 weighs, it is characterised in that: the first difference local oscillation signal, Second difference local oscillation signal is identical with the frequency of third difference local oscillation signal.
- The active mixer 5. a kind of double flat weighs, it is characterised in that: including transconductance stage, the first double flat weighing apparatus switching stage, the second double flat weighing apparatus Switching stage, third double flat weighing apparatus switching stage, the 4th double flat weighing apparatus switching stage, load stage and multiphase filter；Wherein the transconductance stage is for receiving radio-frequency differential voltage input signal and being converted to radio-frequency differential voltage input signal The output of radio-frequency differential current signal；The first input end and the second input terminal of first double flat weighing apparatus switching stage respectively with the first output end of transconductance stage and the Two output ends are connected, and the first double flat weighing apparatus switching stage is for the first difference local oscillation signal to be mixed with radio-frequency differential current signal And generate the output of the first difference current intermediate frequency signal；The first input end and the second input terminal of third double flat weighing apparatus switching stage respectively with the first output end of transconductance stage and the Two output ends are connected, and third double flat weighs switching stage for carrying out third difference local oscillation signal work number with radio-frequency differential current signal It is mixed and generates the output of third difference current intermediate frequency signal；The first output end and second output terminal of first double flat weighing apparatus switching stage respectively with third double flat weighing apparatus switching stage first Output end is connected with second output terminal, so that the first difference current intermediate frequency signal and third difference current intermediate frequency signal are vector superposed And form differential current intermediate frequency signal；The first difference current intermediate frequency signal and third difference current intermediate frequency signal frequency phase Same and quadrature in phase；The first input end and the second input terminal of second double flat weighing apparatus switching stage respectively with the first double flat weighing apparatus switching stage first Output end is connected with second output terminal, the second double flat weigh switching stage be used for by the second difference local oscillation signal and current intermediate frequency signal into Row is mixed and generates the output of the second difference current intermediate frequency signal；The first input end and the second input terminal of 4th double flat weighing apparatus switching stage respectively with third double flat weighing apparatus switching stage first Output end is connected with second output terminal, the 4th double flat weigh switching stage be used for by the 4th difference local oscillation signal and current intermediate frequency signal into Row is mixed and generates the output of the 4th difference current intermediate frequency signal；The frequency and quadrature in phase of the second difference current intermediate frequency signal and the 4th difference current intermediate frequency signal；The load stage and the first output end and second output terminal and the 4th double flat weighing apparatus of second double flat weighing apparatus switching stage are opened The first output end and second output terminal for closing grade are respectively connected with, and load stage is used for the second difference current intermediate frequency signal and the 4th is poor Current intermediate frequency signal is divided to be converted to the second difference voltage intermediate frequency signal and the output of the 4th difference voltage intermediate frequency signal；First to fourth input terminal of the multiphase filter respectively with the second double flat weighing apparatus switching stage the first output end and second First output end of output end and the 4th double flat weighing apparatus switching stage is connected with second output terminal, and multiphase filter is for filtering out second Difference voltage intermediate frequency signal and image signal in the 4th difference voltage intermediate frequency signal and selection filter out second after image signal One of difference voltage intermediate frequency signal and the 4th difference voltage intermediate frequency signal are exported as final difference voltage intermediate frequency signal.
- The active mixer 6. a kind of double flat as claimed in claim 5 weighs, it is characterised in that: the first output end of the transconductance stage The first inductance is parallel between second output terminal.
- 7. such as a kind of double flat weighing apparatus active mixer described in claim 5 or 6, it is characterised in that: first pair of balance cock The second inductance is parallel between first output end of second output terminal and third double flat the weighing apparatus switching stage of grade.
- The active mixer 8. a kind of double flat as claimed in claim 6 weighs, it is characterised in that: the first of the multiphase filter is defeated Enter end and the second input terminal passes through the first intermediate-frequency strip and the second intermediate-frequency strip respectively and the second double flat weighs the of switching stage One output end is connected with second output terminal；The third input terminal and the 4th input terminal of the multiphase filter pass through in third respectively Frequency amplifying stage and the 4th intermediate-frequency strip are connected with the first output end of the 4th double flat weighing apparatus switching stage and second output terminal.
- The active mixer 9. a kind of double flat as claimed in claim 8 weighs, it is characterised in that: the transconductance stage includes the first MOS Pipe, the second metal-oxide-semiconductor, first resistor and second resistance；Wherein the grid of the grid of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor is separately connected The first input end of the transconductance stage and the second input terminal；The drain electrode of first metal-oxide-semiconductor and the drain electrode of the second metal-oxide-semiconductor are separately connected institute State the first output end and second output terminal of transconductance stage；One end of the source electrode connection first resistor of first metal-oxide-semiconductor, the second metal-oxide-semiconductor Source electrode connection second resistance one end, the other end ground connection of the other end of first resistor and second resistance；The first double flat weighing apparatus switching stage includes third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor；3rd MOS The source electrode of the source electrode of pipe and the 4th metal-oxide-semiconductor connects the first input end of the first double flat weighing apparatus switching stage, the source electrode of the 5th metal-oxide-semiconductor and the The source electrode of six metal-oxide-semiconductors connects the second input terminal of the first double flat weighing apparatus switching stage；The grid of the grid of third metal-oxide-semiconductor and the 6th metal-oxide-semiconductor The positive signal of the first difference local oscillation signal is accessed in pole, and the grid of the 4th metal-oxide-semiconductor and the grid of the 5th metal-oxide-semiconductor access the first difference sheet The negative signal of vibration signal；First output of drain electrode connection the first double flat weighing apparatus switching stage of the drain electrode and the 5th metal-oxide-semiconductor of third metal-oxide-semiconductor End, the second output terminal of drain electrode connection the first double flat weighing apparatus switching stage of the drain electrode and the 6th metal-oxide-semiconductor of the 4th metal-oxide-semiconductor；The second double flat weighing apparatus switching stage includes the 7th metal-oxide-semiconductor, the 8th metal-oxide-semiconductor, the 9th metal-oxide-semiconductor and the tenth metal-oxide-semiconductor；7th MOS The source electrode of the source electrode of pipe and the 8th metal-oxide-semiconductor connects the first input end of the second double flat weighing apparatus switching stage, the source electrode of the 9th metal-oxide-semiconductor and the The source electrode of ten metal-oxide-semiconductors connects the second input terminal of the second double flat weighing apparatus switching stage；The grid of 7th metal-oxide-semiconductor and the grid of the tenth metal-oxide-semiconductor The positive signal of the second difference local oscillation signal is accessed in pole, and the grid of the 8th metal-oxide-semiconductor and the grid of the 9th metal-oxide-semiconductor access the second difference sheet The negative signal of vibration signal；First output of drain electrode connection the second double flat weighing apparatus switching stage of the drain electrode and the 9th metal-oxide-semiconductor of the 7th metal-oxide-semiconductor End, the second output terminal of drain electrode connection the second double flat weighing apparatus switching stage of the drain electrode and the tenth metal-oxide-semiconductor of the 8th metal-oxide-semiconductor；The third double flat weighing apparatus switching stage includes the 11st metal-oxide-semiconductor, the 12nd metal-oxide-semiconductor, the 13rd metal-oxide-semiconductor and the 14th metal-oxide-semiconductor； The first input end of the source electrode connection third double flat weighing apparatus switching stage of the source electrode and the 12nd metal-oxide-semiconductor of 11st metal-oxide-semiconductor, the 13rd The source electrode of the source electrode of metal-oxide-semiconductor and the 14th metal-oxide-semiconductor connects the second input terminal of third double flat weighing apparatus switching stage；11st metal-oxide-semiconductor The grid of grid and the 14th metal-oxide-semiconductor accesses the positive signal of third difference local oscillation signal, the grid and the 13rd of the 12nd metal-oxide-semiconductor The negative signal of the grid access third difference local oscillation signal of metal-oxide-semiconductor；The drain electrode of 11st metal-oxide-semiconductor and the drain electrode of the 13rd metal-oxide-semiconductor The second output terminal of third double flat weighing apparatus switching stage is connected, the drain electrode of the 12nd metal-oxide-semiconductor connects third with the drain electrode of the 14th metal-oxide-semiconductor The second output terminal of double flat weighing apparatus switching stage；The 4th double flat weighing apparatus switching stage includes the 15th metal-oxide-semiconductor, the 16th metal-oxide-semiconductor, the 17th metal-oxide-semiconductor and the 18th metal-oxide-semiconductor； The first input end of source electrode connection the 4th double flat weighing apparatus switching stage of the source electrode and the 16th metal-oxide-semiconductor of 15th metal-oxide-semiconductor, the 17th The source electrode of the source electrode of metal-oxide-semiconductor and the 18th metal-oxide-semiconductor connects the second input terminal of the 4th double flat weighing apparatus switching stage；15th metal-oxide-semiconductor The grid of grid and the 18th metal-oxide-semiconductor accesses the positive signal of the second difference local oscillation signal, the grid and the 17th of the 16th metal-oxide-semiconductor The grid of metal-oxide-semiconductor accesses the negative signal of the 4th difference local oscillation signal；The drain electrode of 15th metal-oxide-semiconductor and the drain electrode of the 17th metal-oxide-semiconductor The second output terminal of the 4th double flat weighing apparatus switching stage is connected, the drain electrode of the 16th metal-oxide-semiconductor connects the 4th with the drain electrode of the 18th metal-oxide-semiconductor The second output terminal of double flat weighing apparatus switching stage；First intermediate-frequency strip includes the 8th resistance, the second capacitor, the 21st metal-oxide-semiconductor pipe and the 22nd metal-oxide-semiconductor；Institute Stating the second intermediate-frequency strip includes the 7th resistance, first capacitor, the 19th metal-oxide-semiconductor and the 20th metal-oxide-semiconductor；The third intermediate frequency is put Big grade includes the tenth resistance, the 4th capacitor, the 25th metal-oxide-semiconductor and the 26th metal-oxide-semiconductor；4th intermediate-frequency strip includes 9th resistance, third capacitor, the 23rd metal-oxide-semiconductor and the 24th metal-oxide-semiconductor；Wherein the source electrode of the 19th metal-oxide-semiconductor accesses direct current Power supply, the drain electrode of the 19th metal-oxide-semiconductor connect the second of the drain electrode of the 20th metal-oxide-semiconductor, one end of the 7th resistance and multiphase filter Input terminal, the grid of the 19th metal-oxide-semiconductor connect the one of the other end of the 7th resistance, the grid of the 20th metal-oxide-semiconductor and first capacitor End, the other end of first capacitor connect the second output terminal of the second balance cock grade；The source electrode of 21st metal-oxide-semiconductor accesses direct current Power supply, the drain electrode of the 21st metal-oxide-semiconductor connect the drain electrode of the 22nd metal-oxide-semiconductor, one end of the 8th resistance and multiphase filter First input end, the grid of the 21st metal-oxide-semiconductor connect the grid and second of the other end of the 8th resistance, the 22nd metal-oxide-semiconductor One end of capacitor, the other end of the second capacitor connect the first output end of the second balance cock grade；The source electrode of 20th metal-oxide-semiconductor and The source electrode of 22nd metal-oxide-semiconductor connects the centre cap of the first inductance, one end connection of eleventh resistor by eleventh resistor The source electrode of 20th metal-oxide-semiconductor and the source electrode of the 22nd metal-oxide-semiconductor, the center that the other end of eleventh resistor connects the first inductance are taken out Head；The source electrode of 23rd metal-oxide-semiconductor accesses DC power supply, the leakage of drain electrode the 24th metal-oxide-semiconductor of connection of the 23rd metal-oxide-semiconductor The grid of the third input terminal of pole, one end of the 9th resistance and multiphase filter, the 23rd metal-oxide-semiconductor connects the another of the 9th resistance One end, the grid of the 24th metal-oxide-semiconductor and third capacitor one end, the 4th balance switching stage of other end connection of third capacitor First output end；The source electrode of 25th metal-oxide-semiconductor accesses DC power supply, and the drain electrode of the 25th metal-oxide-semiconductor connects the 26th MOS The drain electrode of pipe, one end of the tenth resistance and multiphase filter the 4th input terminal, the 25th metal-oxide-semiconductor grid connection the tenth electricity The 4th balance of other end connection of one end of the other end of resistance, the grid of the 26th metal-oxide-semiconductor and the 4th capacitor, the 4th capacitor is opened Close the second output terminal of grade；The source electrode of the source electrode of 24th metal-oxide-semiconductor and the 26th metal-oxide-semiconductor passes through twelfth resistor connection the One end of the centre cap of one inductance, twelfth resistor connects the source electrode of the 24th metal-oxide-semiconductor and the source of the 26th metal-oxide-semiconductor Pole, the other end of twelfth resistor connect the centre cap of the first inductance；The load stage includes 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance；3rd resistor, the 4th resistance, the 5th The resistance value of resistance and the 6th resistance is identical；One end of 3rd resistor, one end of the 4th resistance, one end of the 5th resistance and the 6th electricity DC power supply is accessed in one end of resistance；The other end of 3rd resistor connects the first output end of the second double flat weighing apparatus switching stage, the 4th electricity The other end of resistance connects the second output terminal of the second double flat weighing apparatus switching stage, and the other end of the 5th resistance connects the 4th pair of balance cock First output end of grade, the other end of the 6th resistance connect the second output terminal of the 4th double flat weighing apparatus switching stage.
- The active mixer 10. a kind of double flat as claimed in claim 5 weighs, it is characterised in that: the multiphase filter includes the 11 resistance, twelfth resistor, thirteenth resistor, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, 18 resistance, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor and 12 capacitors；The wherein product of eleventh resistor resistance value and the 5th capacitance value, twelfth resistor resistance value and the 6th capacitance value Product, the product of thirteenth resistor resistance value and the 7th capacitance value and the 14th resistance and the 8th capacitance value Product is identical, product, the 16th resistance and the tenth capacitance value of the 15th resistance and the 9th capacitance value Product, the product of the 17th resistance and the 11st capacitance value and the 18th resistance and the 12nd capacitor electricity The product of capacitance is identical；One end of eleventh resistor connects the first input end of the multiphase filter, twelfth resistor with one end of the 5th capacitor One end the third input terminal of the multiphase filter, one end of thirteenth resistor and the 7th electricity are connected with one end of the 6th capacitor One end of appearance connects the second input terminal of the multiphase filter, and one end of the 14th resistance connects institute with one end of the 8th capacitor State the 4th input terminal of multiphase filter；The other end of eleventh resistor connects one end, one end of the 9th capacitor and the other end of the 8th capacitor of the 15th resistance, One end, one end of the tenth capacitor and the other end of the 5th capacitor of the other end the 16th resistance of connection of twelfth resistor, the tenth One end, one end of the 11st capacitor and the other end of the 6th capacitor of the other end the 17th resistance of connection of three resistance, the 14th The other end of resistance connects one end, one end of the 12nd capacitor and the other end of the 7th capacitor of the 18th resistance；The other end of 15th resistance and the other end of the 12nd capacitor connect the first output end of the multiphase filter；Tenth The other end of six resistance connects the other end of the 9th capacitor；The other end of 17th resistance and the other end of the tenth capacitor connect institute State the second output terminal of multiphase filter；The other end of 18th resistance connects the other end of the 11st capacitor.
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| CN117318629A (en) * | 2023-11-29 | 2023-12-29 | 厦门科塔电子有限公司 | Mixer with a high-speed mixer |
| JP2024521842A (en) * | 2021-05-28 | 2024-06-04 | セインチップス テクノロジー カンパニーリミテッド | Frequency Mixers, Transceivers |
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Application publication date: 20191112 |