CN103684433B - A kind of broadband frequency synthesizer - Google Patents
A kind of broadband frequency synthesizer Download PDFInfo
- Publication number
- CN103684433B CN103684433B CN201310700281.7A CN201310700281A CN103684433B CN 103684433 B CN103684433 B CN 103684433B CN 201310700281 A CN201310700281 A CN 201310700281A CN 103684433 B CN103684433 B CN 103684433B
- Authority
- CN
- China
- Prior art keywords
- frequency
- phase discriminator
- broadband
- covers
- frequency range
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000001914 filtration Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention discloses a kind of broadband frequency synthesizer, including: phase discriminator, electric charge pump, loop filter, variable connector 1, multichannel voltage control oscillator unit, variable connector 2, directional coupler and the frequency divider being sequentially connected with；Wherein, frequency divider is connected with phase discriminator again；Multichannel voltage control oscillator unit is switched by timesharing, it is achieved that broadband is across the covering of octave signal；Phase discriminator input reference parameter；Directional coupler output signal.The present invention combines structure based on frequency, assembled unit common technology, parameter coordination technology and power back-off technology is used to achieve the miniaturization of device, solve the limitation of loop filtering, make phase-locked loop work more stable, it is thus achieved that more preferably to make an uproar mutually and the broadband signal of spuious index.
Description
Technical field
The present invention relates to communication technique field, particularly relate to a kind of broadband frequency synthesizer.
Background technology
Frequency is combined and is occupied very important status in modern communications, radar and field of aerospace, to Department of Electronics
The performance of system plays a decisive role, the most also referred to as " heart " of electronic system.Along with modern radar,
Navigation, electronic countermeasure, the fast development of communication technology, the design combining frequency proposes harsher requirement,
The index requests such as the short steady length not only combined frequency is steady, Frequency spectrum quality are more and more higher, and to its size, weight
Amount it is also proposed the requirement of miniaturization.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of broadband frequency synthesizer, in order to solve prior art width
With frequency synthesizer volume more greatly, mutually noisy dissipate relatively big and that loop is unstable problem.
For solving above-mentioned technical problem, the present invention provides a kind of broadband frequency synthesizer, including: it is sequentially connected with
Phase discriminator, electric charge pump, loop filter, variable connector 1, multichannel voltage control oscillator unit, variable connector
2, directional coupler and frequency divider；Wherein, frequency divider is connected with phase discriminator again；Multichannel voltage controlled oscillator list
Unit is switched by timesharing, it is achieved that broadband is across the covering of octave signal；Phase discriminator input reference parameter；
Directional coupler output signal.
Further, multichannel voltage control oscillator unit includes that 5 sections of voltage controlled oscillator VCO, every section of VCO cover
Frequency range as follows: VCO1 covers 350MHz～700MHz frequency range, and VCO2 covers 700MHz～1000GHz
Frequency range, VCO3 covers 1000GHz～1700GHz frequency range, and VCO4 covers 1700GHz～3000GHz
Frequency range, VCO5 covers 3000GHz～6000GHz frequency range.
Further, desired parameters is calculated by embedded chip according to pre-divider ratio, by universal serial bus
Communication mode writes the data to phase discriminator, by constantly adjusting divider ratio, it is possible to constantly regulate electric charge pump
Output electric current, it is thus achieved that applicable loop filter bandwidth.
Further, the output electric current of electric charge pump is calculated by equation below:
I=Nk/KVCO
Wherein, KVCOFor voltage-controlled sensitivity, N is divider ratio, k=3.
Further, described device also includes:
Signal conditioning circuit, between directional coupler and frequency divider；For ensureing that phase discriminator is obtained in that
The feedback signal being suitable for.
Further, signal conditioning circuit includes amplifying circuit and attenuator circuit composition, by regulation amplifying circuit
Amplification and the attenuation of attenuator circuit, thus feedback signal is transferred to suitable amplitude, makes phase discriminator
Obtain suitable feedback power.
Further, attenuator circuit is adjustable attenuator circuit；According to Lagrange mean value theorem, in conjunction with two
The method of dimension interpolation, using frequency and two parameters of attenuation as two dimensions, inserts different data to declining
Subtract device to decay, constantly adjust, finally give and make the feedback signal of full frequency band all unify to reach phase discriminator institute
The applicable power needed.
The present invention has the beneficial effect that:
The present invention combines structure based on frequency, uses assembled unit common technology, parameter coordination technology and power to mend
The technology of repaying achieves the miniaturization of device, solves the limitation of loop filtering, makes phase-locked loop work more
Add stable, it is thus achieved that more preferably make an uproar mutually and the broadband signal of spuious index.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of broadband frequency synthesizer in the embodiment of the present invention；
Fig. 2 is the schematic diagram of phase discriminator input reference parameter in the embodiment of the present invention；
Fig. 3 is the structural representation of signal conditioning circuit in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that this
Specific embodiment described by place, only in order to explain the present invention, does not limit the present invention.
As it is shown in figure 1, the present embodiments relate to a kind of broadband frequency synthesizer, including: the mirror being sequentially connected with
Phase device, electric charge pump, loop filter, variable connector 1, multichannel voltage control oscillator unit, variable connector 2,
Directional coupler and frequency divider；Wherein, frequency divider is connected with phase discriminator again；Reference parameter inputs to phase discriminator；
Directional coupler output signal.
Multichannel voltage control oscillator unit includes that 5 sections of VCO(Voltage Controlled Oscillator are voltage-controlled and shakes
Swing device), the frequency range of every section of VCO covering is as follows: VCO1 covers 350MHz～700MHz frequency range, VCO2
Covering 700MHz～1000GHz frequency range, VCO3 covers 1000GHz～1700GHz frequency range, and VCO4 covers
Lid 1700GHz～3000GHz frequency range, VCO5 covers 3000GHz～6000GHz frequency range, so completes
The full frequency band of 350MHz～6000GHz covers.
By voltage-controlled to the assembled unit and the multichannel that are made up of phase discriminator, frequency divider, electric charge pump and loop filter etc.
Oscillator unit coordinates jointly, uses variable connector timesharing switching between multistage VCO, it is achieved that wideband
Band, across the covering of octave signal, completes the design that broadband is combined across octave frequency, greatly reduces circuit
Volume.
In the design, after once the design of loop filter is fixing, the form of circuit is the most fixing.Due to ring
The design of path filter designs in the case of with reference to a certain fixed frequency, is difficult to meet broadband
Signal, the present embodiment is designed with parameter coordination mode, according to output frequency obtain pre-frequency dividing ratio, adjust
The electric current of economize on electricity lotus pump, makes the bandwidth of loop filtering maintain 150kHz, for full frequency band steady lock and good
Good characteristic of making an uproar mutually provides and ensures.It is implemented as follows:
As in figure 2 it is shown, calculate desired parameters by embedded chip according to pre-divider ratio, total by serial
The communication mode of line writes the data to phase discriminator, by constantly adjusting pre-divider ratio, it is possible to constantly regulate electricity
The output electric current of lotus pump, it is thus achieved that applicable loop filter bandwidth, thus the locking for full frequency band provides safeguard.
The transmission function formula of open loop is: H (S)=［ (I × KVCO)/N ］ * [F (S)/S], wherein I is electric charge pump
Electric current, KVCOFor voltage-controlled sensitivity, N is divider ratio, and H (S) represents open-loop gain；F (S) loop filter
Transmission function；S is variable.Take k=[(I × KVCO)/N]；By substantial amounts of test and calculating, obtain
The a width of 150KHz of the band of loop filtering as k=3, phase margin is 65 °, and at this moment the parameter of loop compares
Properly, for the parameter needed for the present embodiment, in this case, it is possible to obtain suitable loop filter bandwidth,
Thus the locking for full frequency band provides safeguard.
In Design of PLL, the signal returning to phase discriminator loop can be to the spuious of whole design and phase noise
Producing large effect, if feedback signal is excessive, spuious and noise will increase, the too small ring of feedback signal
Road can not complete locking, so, the embodiment of the present invention adds signal conditioning circuit, position at feedback circuit
Between directional coupler and frequency divider；For ensureing that phase discriminator is obtained in that applicable feedback signal.
As it is shown on figure 3, signal conditioning circuit includes amplifying circuit and attenuator circuit composition, amplified by regulation
The amplification of circuit and the attenuation of attenuator circuit, thus feedback signal is transferred to suitable amplitude, make mirror
Phase device obtains suitable feedback power.Attenuator circuit is adjustable attenuator circuit；According to Lagrange intermediate value
Theorem, in conjunction with the method for two-dimensional interpolation, using frequency and two parameters of attenuation as two dimensions, inserts not
With data attenuator is decayed, constantly adjust, finally give and make the feedback signal of full frequency band the most unified
Reach the applicable power required for phase discriminator, it is hereby achieved that spuious little, the signal that characteristic of making an uproar mutually is good；Protect
Demonstrate,prove the quality of full frequency band signal.
The embodiment of the present invention based on frequency combine structure, use assembled unit common technology, parameter coordination technology and
Power back-off technology achieves the miniaturization of device, solves the limitation of loop filtering, makes phase-locked loop
Work more stable, it is thus achieved that more preferably make an uproar mutually and the broadband signal of spuious index.
Although being example purpose, having been disclosed for the preferred embodiments of the present invention, those skilled in the art will
It is also possible for recognizing various improvement, increasing and replace, therefore, on the scope of the present invention should be not limited to
State embodiment.
Claims (6)
1. a broadband frequency synthesizer, it is characterised in that including: the phase discriminator that is sequentially connected with, electric charge pump,
Loop filter, variable connector 1, multichannel voltage control oscillator unit, variable connector 2, directional coupler and
Frequency divider；Wherein, frequency divider is connected with phase discriminator again；Multichannel voltage control oscillator unit is switched by timesharing,
Achieve the broadband covering across octave signal；Phase discriminator input reference parameter；Directional coupler output letter
Number,
Wherein, calculate desired parameters by embedded chip according to pre-divider ratio, leading to by universal serial bus
Letter mode writes the data to phase discriminator, by constantly adjusting divider ratio, it is possible to constantly regulation electric charge pump is defeated
Go out electric current, it is thus achieved that applicable loop filter bandwidth.
2. broadband frequency synthesizer as claimed in claim 1, it is characterised in that multichannel voltage controlled oscillator list
Unit includes 5 sections of voltage controlled oscillator VCO, and the frequency range of every section of VCO covering is as follows: VCO1 covers
350MHz～700MHz frequency range, VCO2 covers 700MHz～1000GHz frequency range, and VCO3 covers
1000GHz～1700GHz frequency range, VCO4 covers 1700GHz～3000GHz frequency range, and VCO5 covers
3000GHz～6000GHz frequency range.
3. broadband frequency synthesizer as claimed in claim 1, it is characterised in that the output electric current of electric charge pump
Calculated by equation below:
I=Nk/KVCO
Wherein, KVCOFor voltage-controlled sensitivity, N is divider ratio, k=3.
4. the broadband frequency synthesizer as described in claim 1,2 or 3, it is characterised in that described device is also
Including:
Signal conditioning circuit, between directional coupler and frequency divider；For ensureing that phase discriminator is obtained in that
The feedback signal being suitable for.
5. broadband frequency synthesizer as claimed in claim 4, it is characterised in that signal conditioning circuit includes
Amplifying circuit and attenuator circuit composition, by amplification and the decay of attenuator circuit of regulation amplifying circuit
Amount, thus feedback signal is transferred to suitable amplitude, make phase discriminator obtain suitable feedback power.
6. broadband frequency synthesizer as claimed in claim 5, it is characterised in that attenuator circuit is scalable
Attenuator circuit；According to Lagrange mean value theorem, in conjunction with the method for two-dimensional interpolation, by frequency and attenuation
Two parameters, as two dimensions, are inserted different data and are decayed attenuator, constantly adjust, finally
Obtain making the feedback signal of full frequency band all unify the applicable power reached required for phase discriminator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310700281.7A CN103684433B (en) | 2013-12-18 | 2013-12-18 | A kind of broadband frequency synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310700281.7A CN103684433B (en) | 2013-12-18 | 2013-12-18 | A kind of broadband frequency synthesizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103684433A CN103684433A (en) | 2014-03-26 |
| CN103684433B true CN103684433B (en) | 2016-08-17 |
Family
ID=50320898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310700281.7A Active CN103684433B (en) | 2013-12-18 | 2013-12-18 | A kind of broadband frequency synthesizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103684433B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202045B (en) * | 2014-08-07 | 2017-12-08 | 南京誉葆科技有限公司 | Broadband self-test signal source |
| CN104363013B (en) * | 2014-09-02 | 2018-06-08 | 中国科学院国家授时中心 | A kind of FV convertor of low additional noise |
| CN105811947B (en) * | 2014-12-31 | 2019-07-02 | 展讯通信（上海）有限公司 | RF switch and demultiplexer |
| CN105897298A (en) * | 2016-06-03 | 2016-08-24 | 北京航空航天大学 | Multi-stage modular wireless transceiver experimental platform |
| CN109959825B (en) * | 2017-12-26 | 2023-07-21 | 东南大学 | A fitting calibration method for nonlinear voltage-controlled attenuators based on Lagrangian interpolation method |
| CN110417406B (en) * | 2019-06-25 | 2022-11-22 | 成都九洲迪飞科技有限责任公司 | Digital phase-locked loop for realizing broadband frequency source by adopting integrated multi-section broadband VCO |
| CN110739966B (en) * | 2019-09-29 | 2021-12-17 | 浙江大学 | Broadband low-stray phase-locked loop circuit |
| CN118625721B (en) * | 2024-08-09 | 2024-11-12 | 成都玖锦科技有限公司 | Large-bandwidth digital ALC method and system based on FPGA |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389898A (en) * | 1992-06-22 | 1995-02-14 | Matsushita Electric Industrial Co., Ltd. | Phase locked loop having plural selectable voltage controlled oscillators |
| CN1748368A (en) * | 2003-02-14 | 2006-03-15 | 飞思卡尔半导体公司 | System and method for coarse tuning a phase locked loop (pll) synthesizer using 2-pi slip detection |
| CN101030781A (en) * | 2006-01-17 | 2007-09-05 | 三星电子株式会社 | Sigma-delta fractional-n phase locked loop for reducing lock time and frequency error |
| CN101436859A (en) * | 2007-11-16 | 2009-05-20 | 安凡微电子(上海)有限公司 | Rapidly-locked frequency generator |
| TW200935719A (en) * | 2008-02-05 | 2009-08-16 | Rafael Microelectronics Inc | Multi-band VCO |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6788155B2 (en) * | 2002-12-31 | 2004-09-07 | Intel Corporation | Low gain phase-locked loop circuit |
-
2013
- 2013-12-18 CN CN201310700281.7A patent/CN103684433B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389898A (en) * | 1992-06-22 | 1995-02-14 | Matsushita Electric Industrial Co., Ltd. | Phase locked loop having plural selectable voltage controlled oscillators |
| CN1748368A (en) * | 2003-02-14 | 2006-03-15 | 飞思卡尔半导体公司 | System and method for coarse tuning a phase locked loop (pll) synthesizer using 2-pi slip detection |
| CN101030781A (en) * | 2006-01-17 | 2007-09-05 | 三星电子株式会社 | Sigma-delta fractional-n phase locked loop for reducing lock time and frequency error |
| CN101436859A (en) * | 2007-11-16 | 2009-05-20 | 安凡微电子(上海)有限公司 | Rapidly-locked frequency generator |
| TW200935719A (en) * | 2008-02-05 | 2009-08-16 | Rafael Microelectronics Inc | Multi-band VCO |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103684433A (en) | 2014-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103684433B (en) | A kind of broadband frequency synthesizer | |
| TWI528725B (en) | Wideband frequency synthesizer and frequency synthesizing method thereof | |
| EP3202042B1 (en) | 60 ghz frequency generator incorporating third harmonic boost and extraction | |
| CN105577178B (en) | A kind of broadband low phase noise Sigma-Delta phaselocked loop | |
| US8493105B2 (en) | Injection-locked frequency divider | |
| TWI501559B (en) | Frequency synthesizer and frequency synthesizing method thereof | |
| CN110417406A (en) | The digital phase-locked loop of broadband frequency source is realized using integrated multisection type broadband VCO | |
| CN107094016A (en) | A kind of clock generation circuit for realizing low jitter | |
| CN105049036B (en) | A kind of wideband low noise signal generator | |
| CN202167988U (en) | Charge pump circuit for phase-locked loop | |
| CN108933597A (en) | A kind of thin step frequency synthesizer of broadband Low phase noise and frequency combining method | |
| CN101753138B (en) | Double-loop frequency synthesizer and phase noise analyzing method | |
| CN204498106U (en) | A kind of frequency with output power function closes circuit | |
| CN104702276A (en) | Fast locking microwave frequency resource circuit and equipment | |
| US9929737B2 (en) | Oscillator arrangement, method, computer program and communication device | |
| US10566954B2 (en) | Variable capacitance circuit, oscillator circuit, and method of controlling variable capacitance circuit | |
| CN103607173B (en) | A kind of voltage controlled oscillator of variable voltage-controlled sensitivity | |
| Jeong et al. | X-band self oscillating mixer with resonator-antenna filter | |
| KR20140117938A (en) | Ring-type Voltage Controlled Oscillator | |
| Lee et al. | A low phase noise 30-GHz frequency synthesizer with linear transconductance VCO and dual-injection-locked frequency divider | |
| CN103166632B (en) | Loop filter and phase-locked loop circuit | |
| CN204442345U (en) | A kind of quick lock in Microwave Frequency Source phase lock circuitry and equipment | |
| Muppala et al. | Design of high-frequency wide-range all digital phase locked loop in 90 nm CMOS | |
| CN105024694A (en) | Single-loop broadband phase-locked loop | |
| WO2014106899A1 (en) | High frequency oscillation source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |