CN102404022A - Power amplification module, radio frequency front end module and multi-mode terminal - Google Patents
Power amplification module, radio frequency front end module and multi-mode terminal Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0277—Selecting one or more amplifiers from a plurality of amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
- H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/429—Two or more amplifiers or one amplifier with filters for different frequency bands are coupled in parallel at the input or output
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7209—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched from a first band to a second band
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7221—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by a switch at the output of the amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7236—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers by (a ) switch(es)
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Abstract
The invention provides a power amplification module, a radio frequency front-end module, a multi-mode radio frequency transceiver, a multi-mode terminal and a method for sending signals by the multi-mode terminal, wherein the power amplification module comprises a control module, a low-frequency amplifier and a high-frequency amplifier which are connected with the control module, and the control module is used for sending a working mode indicating signal to the low-frequency amplifier or the high-frequency amplifier according to a control signal from a baseband chip; the low-frequency amplifier is used for receiving a low-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the low-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the amplified low-frequency transmitting signal; the high-frequency amplifier is used for receiving a high-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the high-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the high-frequency transmitting signal. The multi-mode terminal comprising the power amplification module effectively reduces the area occupied by the PCB.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a power amplification module, a radio frequency front end module, a multimode radio frequency transceiver, a multimode terminal, and a method for transmitting a signal by a multimode terminal.
Background
Currently, in the architecture scheme of a Wideband Code Division Multiple Access (WCDMA)/Global System for Mobile Communication (GSM) dual-mode Mobile phone, a common implementation method is that, as shown in fig. 1, a baseband chip 100, an antenna switch module 200, a WCDMA/GSM dual-mode radio frequency transceiver 300, a GSM power amplifier 410, at least one WCDMA power amplifier 420, and a duplexer 430 are required. Since the International Telecommunication Union (ITU) divides ten BANDs (BANDs) in the WCDMA spectrum planning to meet the BAND application requirements of different countries and regions for WCDMA, if a WCDMA handset needs to support multiple BANDs simultaneously, a corresponding WCDMA power amplifier and duplexer need to be set for each BAND.
In the process of implementing the technical scheme of the invention, the inventor finds that: in the above-mentioned commonly used architecture scheme, the radio frequency part requires at least one GSM power amplifier, one WCDMA power amplifier and one duplexer. If the WCDMA multi-BAND is to be supported, a plurality of WCDMA power amplifiers and duplexers corresponding to the BAND are required to be added. In the structure, the number of chips of the power amplifier and the duplexer is too large, so that the circuit structure is very complex, a large amount of Printed Circuit Board (PCB) area is occupied, the cost is not reduced, and the terminal is not miniaturized.
Disclosure of Invention
The embodiment of the invention provides a power amplification module, a radio frequency front-end module, a multi-mode radio frequency transceiver, a multi-mode terminal and a method for sending signals by the multi-mode terminal, and aims to solve the problem that the existing multi-mode terminal occupies a large PCB area.
The embodiment of the invention provides a power amplification module, which is applied to a transmitting channel of a multi-mode terminal, and comprises a control module, and a low-frequency amplifier and a high-frequency amplifier which are connected with the control module, wherein:
the control module is used for sending a working mode indicating signal to the low-frequency amplifier or the high-frequency amplifier according to a control signal from a baseband chip;
the low-frequency amplifier is used for receiving a low-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the low-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the amplified low-frequency transmitting signal;
the high-frequency amplifier is used for receiving a high-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the high-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the amplified high-frequency transmitting signal.
Preferably, the control module is configured to send a linear operating mode indication signal to the low-frequency amplifier when the control signal indicates that the signal in the current transmission channel is a low-frequency transmission signal of the first mode signal; when the control signal indicates that the signal in the current transmitting channel is a low-frequency transmitting signal of a second mode signal, a saturated working mode indicating signal is sent to the low-frequency amplifier; when the control signal indicates that the signal in the current transmitting channel is the high-frequency transmitting signal of the first mode signal, sending a linear working mode indicating signal to the high-frequency amplifier; or when the control signal indicates that the signal in the current transmitting channel is the high-frequency transmitting signal of the second mode signal, sending a saturated working mode indicating signal to the high-frequency amplifier.
Preferably, the first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal;
the second mode signal is a global system for mobile communications (GSM) signal.
The embodiment of the invention also provides a radio frequency front end module, which is applied to a multi-mode terminal, and comprises an antenna switch module, a low-band duplexer and a high-band duplexer, wherein:
the low-frequency band duplexer is used for receiving a low-frequency transmitting signal of a first mode signal or a low-frequency transmitting signal of a second mode signal and sending the low-frequency transmitting signal of the corresponding mode signal to the antenna switch module;
the high-frequency band duplexer is used for receiving a high-frequency transmitting signal of a first mode signal or a high-frequency transmitting signal of a second mode signal and sending the high-frequency transmitting signal of the corresponding mode signal to the antenna switch module;
the antenna switch module is configured to input a low-frequency transmit signal of the first mode signal or a low-frequency transmit signal of the second mode signal sent by the low-band duplexer, or input a high-frequency transmit signal of the first mode signal or a high-frequency transmit signal of the second mode signal sent by the high-band duplexer; and receiving the low-frequency receiving signal of the first mode signal and outputting the low-frequency receiving signal to the low-band duplexer and receiving the high-frequency receiving signal of the first mode signal and outputting the high-frequency receiving signal to the high-band duplexer.
Preferably, the rf front-end module further comprises a low frequency receiving filter and a high frequency receiving filter; wherein:
the low-frequency receiving filter is used for receiving the low-frequency receiving signal of the second mode signal sent by the antenna switch module, filtering the low-frequency receiving signal of the second mode signal and outputting the filtered low-frequency receiving signal;
the high-frequency receiving filter is used for receiving the high-frequency receiving signal of the second mode signal sent by the antenna switch module, filtering the high-frequency receiving signal of the second mode signal and outputting the filtered high-frequency receiving signal;
the low-frequency band duplexer is also used for receiving and outputting a low-frequency receiving signal of the first mode signal sent by the antenna switch module;
and the high-band duplexer is also used for receiving and outputting the high-frequency receiving signal of the first mode signal sent by the antenna switch module.
Preferably, the first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal; the second mode signal is a global system for mobile communications (GSM) signal.
The embodiment of the invention also provides a multimode radio frequency transceiver, which is applied to a multimode terminal and comprises the following components:
the frequency conversion module is used for converting baseband transmission signals of various mode signals sent by the baseband chip into low-frequency transmission signals or high-frequency transmission signals corresponding to the mode signals under the control of the baseband chip;
and the output module is used for outputting the low-frequency transmitting signal converted by the frequency conversion module through a low-frequency band transmitting port and outputting the high-frequency transmitting signal converted by the frequency conversion module through a high-frequency band transmitting port.
Preferably, the various mode signals are Wideband Code Division Multiple Access (WCDMA) signals, Code Division Multiple Access (CDMA) signals, or global system for mobile communications (GSM) signals.
The embodiment of the invention also provides a multimode terminal, which comprises a baseband chip, a multimode radio frequency transceiver, a power amplification module and a radio frequency front end module which are connected in sequence, wherein:
the multimode radio frequency transceiver adopts the multimode radio frequency transceiver;
the power amplification module adopts the power amplification module;
the radio frequency front end module adopts the radio frequency front end module.
The embodiment of the invention also provides a multi-mode terminal, which comprises a baseband chip, a multi-mode radio frequency transceiver, a power amplification module and a radio frequency front end module which are connected in sequence, and the multi-mode terminal also comprises a switch circuit positioned between the multi-mode radio frequency transceiver and the power amplification module;
the power amplification module adopts the power amplification module;
the radio frequency front-end module adopts the radio frequency front-end module;
the switching circuit is configured to switch a low-frequency transmission signal of the first mode signal or a low-frequency transmission signal of the second mode signal sent by the multimode rf transceiver to a low-frequency amplifier in the power amplification module, or switch a high-frequency transmission signal of the first mode signal or a high-frequency transmission signal of the second mode signal sent by the multimode rf transceiver to a high-frequency amplifier in the power amplification module.
The embodiment of the invention also provides a method for sending signals by the multimode terminal, which comprises the following steps:
the power amplification module amplifies a low-frequency transmitting signal of the received first mode signal or a high-frequency transmitting signal of the first mode signal in a linear working mode under the control of the baseband chip and outputs the amplified low-frequency transmitting signal or the amplified high-frequency transmitting signal to the radio frequency front-end module; or, the power amplification module amplifies the received low-frequency transmission signal of the second mode signal or the high-frequency transmission signal of the second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified low-frequency transmission signal or the amplified high-frequency transmission signal to the radio frequency front-end module;
the radio frequency front end module transmits the received signal.
Preferably, the power amplification module amplifies, in a linear operating mode, the low-frequency transmission signal of the received first mode signal or the high-frequency transmission signal of the first mode signal and outputs the amplified signal to the radio frequency front end module under the control of the baseband chip, and includes:
a low-frequency amplifier in the power amplification module amplifies a low-frequency transmitting signal of a received first mode signal in a linear working mode under the control of a baseband chip and outputs the amplified low-frequency transmitting signal to a radio frequency front-end module; or
A high-frequency amplifier in the power amplification module amplifies a high-frequency transmitting signal of a received first mode signal in a linear working mode under the control of a baseband chip and outputs the amplified high-frequency transmitting signal to a radio frequency front-end module; or,
the power amplification module amplifies a low-frequency transmission signal of a received second mode signal or a high-frequency transmission signal of the second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified low-frequency transmission signal or the amplified high-frequency transmission signal to the radio frequency front end module, and the power amplification module comprises:
a low-frequency amplifier in the power amplification module amplifies a low-frequency transmitting signal of a received second mode signal in a saturation working mode under the control of a baseband chip and outputs the amplified low-frequency transmitting signal to a radio frequency front-end module; or
And the high-frequency amplifier in the power amplification module amplifies the received high-frequency transmitting signal of the second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified high-frequency transmitting signal to the radio frequency front-end module.
Preferably, before the low frequency amplifier amplifies the received signal, the method further comprises:
the multimode radio frequency transceiver carries out frequency conversion on the first mode baseband transmission signal or the second mode baseband transmission signal sent by the baseband chip to a corresponding low-frequency transmission signal, and then outputs the low-frequency transmission signal to the low-frequency amplifier; or the switching circuit switches the low-frequency transmitting signal of the first mode signal or the low-frequency transmitting signal of the second mode signal sent by the multi-mode radio frequency transceiver to the low-frequency amplifier; or
Before the high frequency amplifier amplifies the received signal, the method further comprises:
the multimode radio frequency transceiver carries out frequency conversion on the first mode baseband transmission signal or the second mode baseband transmission signal sent by the baseband chip to a corresponding high-frequency transmission signal, and then outputs the high-frequency transmission signal to the high-frequency amplifier; or the switching circuit switches the high-frequency transmitting signal of the first mode signal or the high-frequency transmitting signal of the second mode signal sent by the multi-mode radio frequency transceiver to the high-frequency amplifier.
Preferably, the first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal; the second mode transmission signal is a global system for mobile communications (GSM) signal.
The power amplification module comprising the low-frequency amplifier and the high-frequency amplifier effectively saves the number of the power amplifiers by dividing radio-frequency signals of various modes and various frequency bands into the low-frequency signals and the high-frequency signals and amplifying the low-frequency signals and the high-frequency signals by the corresponding amplifiers; and further effectively reducing the area of the PCB occupied by the multimode terminal comprising the power amplification module.
Drawings
FIG. 1 is a schematic diagram of a conventional WCDMA/GSM dual-mode handset architecture;
fig. 2 is a schematic structural diagram of a dual-mode terminal according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of internal architectures of a dual-mode power amplification module and a radio frequency front end module according to an embodiment of the present invention and signal connections thereof;
fig. 4 is a schematic structural diagram of a dual-mode terminal according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The embodiment of the invention provides a power amplification module, which is applied to a transmitting channel of a multi-mode terminal, and comprises a control module, and a low-frequency amplifier and a high-frequency amplifier which are connected with the control module, wherein:
the control module is used for sending a working mode indicating signal to the low-frequency amplifier or the high-frequency amplifier according to a control signal from a baseband chip;
the low-frequency amplifier is used for receiving a low-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the low-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the amplified low-frequency transmitting signal;
the high-frequency amplifier is used for receiving a high-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the high-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the amplified high-frequency transmitting signal.
The control module is used for sending a linear working mode indicating signal to the low-frequency amplifier when the control signal indicates that the signal in the current transmitting channel is a low-frequency transmitting signal of a first mode signal; when the control signal indicates that the signal in the current transmitting channel is a low-frequency transmitting signal of a second mode signal, a saturated working mode indicating signal is sent to the low-frequency amplifier; when the control signal indicates that the signal in the current transmitting channel is the high-frequency transmitting signal of the first mode signal, sending a linear working mode indicating signal to the high-frequency amplifier; or when the control signal indicates that the signal in the current transmitting channel is the high-frequency transmitting signal of the second mode signal, sending a saturated working mode indicating signal to the high-frequency amplifier. The low-frequency amplifier is used for receiving a low-frequency transmitting signal of a first mode signal and a linear working mode indicating signal sent by the control module, amplifying the low-frequency transmitting signal of the first mode signal in a linear working mode and then outputting the amplified low-frequency transmitting signal; or receiving a low-frequency transmitting signal of a second mode signal and a saturated working mode indicating signal sent by the control module, amplifying the low-frequency transmitting signal of the second mode signal in a saturated working mode, and then outputting the amplified low-frequency transmitting signal. The high-frequency amplifier is used for receiving a high-frequency transmitting signal of a first mode signal and a linear working mode indicating signal sent by the control module, amplifying the high-frequency transmitting signal of the first mode signal in a linear working mode and then outputting the amplified high-frequency transmitting signal; or receiving a high-frequency transmitting signal of a second mode signal and a saturated working mode indicating signal sent by the control module, amplifying the high-frequency transmitting signal of the second mode signal in a saturated working mode, and then outputting the amplified high-frequency transmitting signal.
The first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal; the second mode signal is a global system for mobile communications (GSM) signal.
The power amplification module can be a GSM/WCDMA power amplification module, which does not simply integrate and package the traditional GSM and WCDMA power amplifiers in one chip, but only includes two low-frequency and high-frequency power amplifiers and one control module. Namely, the signal input port of the dual-mode power amplification module is not distributed according to GSM and WCDMA signals, but is divided into two signal ports of low frequency and high frequency; similarly, the output port is divided into two signal ports of low frequency and high frequency. The power amplifier is controlled in a linear working mode when amplifying WCDMA signals; when amplifying a GSM signal, the GSM signal is controlled to be in a saturation working mode.
According to the power amplification module comprising the low-frequency amplifier and the high-frequency amplifier, the radio-frequency signals in various modes and various frequency bands are only divided into the low-frequency signals and the high-frequency signals, and the low-frequency signals and the high-frequency signals are amplified by the corresponding amplifiers, so that the number of the power amplifiers is effectively saved, and the area of a PCB occupied by the power amplification module is effectively reduced.
The embodiment of the invention also provides a radio frequency front end module, which is applied to a multi-mode terminal, and comprises an antenna switch module, a low-band duplexer and a high-band duplexer, wherein:
the low-frequency band duplexer is used for receiving a low-frequency transmitting signal of a first mode signal or a low-frequency transmitting signal of a second mode signal and sending the low-frequency transmitting signal of the corresponding mode signal to the antenna switch module;
the high-frequency band duplexer is used for receiving a high-frequency transmitting signal of a first mode signal or a high-frequency transmitting signal of a second mode signal and sending the high-frequency transmitting signal of the corresponding mode signal to the antenna switch module;
the antenna switch module is configured to input a low-frequency transmit signal of the first mode signal or a low-frequency transmit signal of the second mode signal sent by the low-band duplexer, or input a high-frequency transmit signal of the first mode signal or a high-frequency transmit signal of the second mode signal sent by the high-band duplexer; and receiving the low-frequency receiving signal of the first mode signal and outputting the low-frequency receiving signal to the low-band duplexer and receiving the high-frequency receiving signal of the first mode signal and outputting the high-frequency receiving signal to the high-band duplexer.
In addition, the radio frequency front-end module also comprises a low-frequency receiving filter and a high-frequency receiving filter; wherein:
the low-frequency receiving filter is used for receiving the low-frequency receiving signal of the second mode signal sent by the antenna switch module, filtering the low-frequency receiving signal of the second mode signal and outputting the filtered low-frequency receiving signal;
the high-frequency receiving filter is used for receiving the high-frequency receiving signal of the second mode signal sent by the antenna switch module, filtering the high-frequency receiving signal of the second mode signal and outputting the filtered high-frequency receiving signal;
the low-frequency band duplexer is also used for receiving and outputting a low-frequency receiving signal of the first mode signal sent by the antenna switch module;
and the high-band duplexer is also used for receiving and outputting the high-frequency receiving signal of the first mode signal sent by the antenna switch module.
Preferably, the first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal; the second mode signal is a global system for mobile communications (GSM) signal.
In order to better implement the functions of the power amplifier, an embodiment of the present invention further provides a multimode rf transceiver applied to a multimode terminal, where the multimode rf transceiver includes:
the frequency conversion module is used for converting baseband transmission signals of various mode signals sent by the baseband chip into low-frequency transmission signals or high-frequency transmission signals corresponding to the mode signals under the control of the baseband chip;
and the output module is used for outputting the low-frequency transmitting signal converted by the frequency conversion module through a low-frequency band transmitting port and outputting the high-frequency transmitting signal converted by the frequency conversion module through a high-frequency band transmitting port.
The various mode signals may be Wideband Code Division Multiple Access (WCDMA) signals, Code Division Multiple Access (CDMA) signals, or global system for mobile communications (GSM) signals, among others.
As shown in fig. 2, which is a schematic structural diagram of a dual-mode terminal according to a first embodiment of the present invention, the dual-mode terminal includes: a baseband chip 100, a WCDMA/GSM dual-mode radio frequency transceiver 200, a WCDMA/GSM dual-mode power amplification module 300 and a radio frequency front end module 400.
The structures of the WCDMA/GSM dual-mode power amplification module 300 and the rf front-end module 400 are the same as those of the power amplification module and the rf front-end module in the above embodiments, and are not described herein again.
The dual-mode radio frequency transceiver matched with the dual-mode power amplification module is different from the prior art, and the output port of the dual-mode radio frequency transceiver is only divided according to the low-frequency LB and the high-frequency HB and is not distinguished due to different signals.
As shown in fig. 3, it is a schematic diagram of the internal architecture and signal connection of the dual-mode power amplification module and the rf front-end module according to the embodiment of the present invention, wherein the rf front-end module 400 mainly includes three parts: an antenna switch module 401, a low band duplexer (LB DUP)402, a high band duplexer (HB DUP)403, a low band GSM receive surface acoustic wave filter (RX SAW)404, and a high band GSM RXSAW 405.
In the receiving link of the dual-mode handset architecture in the above embodiment, the electromagnetic wave signal enters the antenna switch module 401 of the rf front-end module 400 after being received by the antenna, and under the control of the baseband chip 100, the antenna switch selects a corresponding receiving working frequency band, and sends the GSM signal to the RX SAW 404 or 405 in the rf front-end module 400 in the corresponding frequency band, or sends the WCDMA signal to the duplexer 402 or 403 in the rf front-end module 400 in the corresponding frequency band, and then the signal is sent to the dual-mode rf transceiver 200. The dual-mode rf transceiver 200 adopts a zero-if receiving scheme to convert the received rf signal directly into a baseband I/Q signal, and send the baseband I/Q signal to the baseband chip 100, and the baseband chip 100 performs demodulation, decoding, and other processing to restore the original signal.
In the transmission link of the dual-mode handset architecture of the above embodiment, the baseband chip 100 completes the processing of encoding, modulating, etc. of the original signal to obtain the I/Q signal of GSM or WCDMA, and sends the I/Q signal into the dual-mode rf transceiver 200, and the transmission part in the dual-mode rf transceiver 200 outputs the rf modulation signal after completing the change processing of the input I/Q signal. The output port of the dual-mode rf transceiver 200 is divided into a Low Band (LB) and a High Band (HB) only, and is not divided according to the GSM and WCDMA signals. The frequency range of the LB transmitting signal ranges from 824MHz to 915MHz, and the frequency range of the HB transmitting signal ranges from 1710MHz to 2570 MHz. The low-frequency or high-frequency rf modulation signal is respectively sent to the low-frequency or high-frequency input terminal of the dual-mode power amplifying module 300. Meanwhile, the baseband chip sends a control signal to the dual-mode radio frequency transceiver 200 and the dual-mode power amplification module 300, when a GSM signal is amplified, the static working point of the PA1 or the PA2 is adjusted to enable the dual-mode radio frequency transceiver to work in class C, and meanwhile, the radio frequency output power of the radio frequency transceiver is adjusted to drive the PA1 or the PA2 to enter a saturated working state, so that the high efficiency of the amplifier can be ensured when the GSM signal is amplified; when amplifying WCDMA signals, the control signal adjusts the static operating point of the PA1 or PA2 to make it work in class AB, and adjusts the radio frequency output power of the radio frequency transceiver to drive the PA1 or PA2 to work in a linear state, so as to ensure that each radio frequency index of WCDMA meets the requirement.
Specifically, the method for the multimode terminal to transmit the signal includes:
under the control of a baseband chip, a power amplification module amplifies a low-frequency transmission signal of a received first mode signal or a high-frequency transmission signal of the first mode signal in a linear working mode and outputs the amplified low-frequency transmission signal or the high-frequency transmission signal to a radio frequency front-end module; or, the power amplification module amplifies the received low-frequency transmission signal of the second mode signal or the high-frequency transmission signal of the second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified low-frequency transmission signal or the amplified high-frequency transmission signal to the radio frequency front-end module;
specifically, a low-frequency amplifier in the power amplification module amplifies a low-frequency transmission signal of a received first mode signal in a linear working mode under the control of a baseband chip and outputs the amplified low-frequency transmission signal to a radio frequency front-end module; or, the high-frequency amplifier in the power amplification module amplifies the high-frequency transmission signal of the received first mode signal in the linear working mode under the control of the baseband chip and outputs the amplified high-frequency transmission signal to the radio frequency front-end module; or, the low-frequency amplifier in the power amplification module amplifies a low-frequency transmission signal of the received second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified low-frequency transmission signal to the radio frequency front-end module; or, the high-frequency amplifier in the power amplification module amplifies the received high-frequency transmission signal of the second mode signal in the saturation working mode and outputs the amplified high-frequency transmission signal to the radio frequency front-end module under the control of the baseband chip.
In addition, before the low frequency amplifier amplifies the received signal, the method further includes: the multimode radio frequency transceiver carries out frequency conversion on the first mode baseband transmission signal or the second mode baseband transmission signal sent by the baseband chip to a corresponding low-frequency transmission signal, and then outputs the low-frequency transmission signal to the low-frequency amplifier; or the switching circuit switches the low-frequency transmitting signal of the first mode signal or the low-frequency transmitting signal of the second mode signal sent by the multi-mode radio frequency transceiver to the low-frequency amplifier. Before the high frequency amplifier amplifies the received signal, the method further comprises: the multimode radio frequency transceiver carries out frequency conversion on the first mode baseband transmission signal or the second mode baseband transmission signal sent by the baseband chip to a corresponding high-frequency transmission signal, and then outputs the high-frequency transmission signal to the high-frequency amplifier; or the switching circuit switches the high-frequency transmitting signal of the first mode signal or the high-frequency transmitting signal of the second mode signal sent by the multi-mode radio frequency transceiver to the high-frequency amplifier.
And step two, the radio frequency front end module sends a received signal, wherein the received signal is a low-frequency emission signal of the first mode signal, a high-frequency emission signal of the first mode signal, a low-frequency emission signal of the second mode signal or a high-frequency emission signal of the second mode signal.
Specifically, the power-amplified GSM rf signal is directly sent to the antenna switch module 401 in the rf front-end module 400, and the power-amplified WCDMA rf signal is sent to the duplexer 402 or 403 in the rf front-end module 400 and then to the antenna switch module 401. Finally, the WCDMA/GSM RF signal is sent to the main antenna of the handset by the antenna switch module 401.
Fig. 4 is a schematic structural diagram of a dual-mode terminal according to a second embodiment of the present invention, which is different from the dual-mode terminal shown in fig. 3 in that the WCDMA/GSM dual-mode rf transceiver 200 still uses the transceiver scheme of the prior art, i.e., the output port is still divided according to the WCDMA and GSM signals. The radio frequency output end of the WCDMA/GSM dual-mode radio frequency transceiver 200 passes through a switch circuit 500, which switches the transmission signal to two paths of low frequency LB or high frequency HB for output, and sends the output to the WCDMA/GSM dual-mode power amplification module 300.
The dual-mode architecture provided by the embodiment of the invention is not limited to a WCDMA/GSM dual mode, and can also be a CDMA/GSM dual mode.
The multi-mode terminal comprising the power amplification module effectively reduces the area occupied by the PCB.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.
The above embodiments are merely to illustrate the technical solutions of the present invention and not to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it should be understood that the present invention is to be covered by the appended claims.
Claims (14)
1. A power amplification module applied to a transmitting channel of a multimode terminal is characterized by comprising a control module, and a low-frequency amplifier and a high-frequency amplifier which are connected with the control module, wherein:
the control module is used for sending a working mode indicating signal to the low-frequency amplifier or the high-frequency amplifier according to a control signal from a baseband chip;
the low-frequency amplifier is used for receiving a low-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the low-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the amplified low-frequency transmitting signal;
the high-frequency amplifier is used for receiving a high-frequency transmitting signal and a working mode indicating signal sent by the control module, amplifying the high-frequency transmitting signal in a working mode indicated by the working mode indicating signal and then outputting the amplified high-frequency transmitting signal.
2. The power amplification module of claim 1, wherein:
the control module is used for sending a linear working mode indicating signal to the low-frequency amplifier when the control signal indicates that the signal in the current transmitting channel is the low-frequency transmitting signal of the first mode signal; when the control signal indicates that the signal in the current transmitting channel is a low-frequency transmitting signal of a second mode signal, a saturated working mode indicating signal is sent to the low-frequency amplifier; when the control signal indicates that the signal in the current transmitting channel is the high-frequency transmitting signal of the first mode signal, sending a linear working mode indicating signal to the high-frequency amplifier; or when the control signal indicates that the signal in the current transmitting channel is the high-frequency transmitting signal of the second mode signal, sending a saturated working mode indicating signal to the high-frequency amplifier.
3. The power amplification module of claim 2, wherein:
the first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal;
the second mode signal is a global system for mobile communications (GSM) signal.
4. The utility model provides a radio frequency front end module, is applied to multimode terminal which characterized in that, radio frequency front end module includes antenna switch module, low band duplexer and high band duplexer, wherein:
the low-frequency band duplexer is used for receiving a low-frequency transmitting signal of a first mode signal or a low-frequency transmitting signal of a second mode signal and sending the low-frequency transmitting signal of the corresponding mode signal to the antenna switch module;
the high-frequency band duplexer is used for receiving a high-frequency transmitting signal of a first mode signal or a high-frequency transmitting signal of a second mode signal and sending the high-frequency transmitting signal of the corresponding mode signal to the antenna switch module;
the antenna switch module is configured to input a low-frequency transmit signal of the first mode signal or a low-frequency transmit signal of the second mode signal sent by the low-band duplexer, or input a high-frequency transmit signal of the first mode signal or a high-frequency transmit signal of the second mode signal sent by the high-band duplexer; and receiving the low-frequency receiving signal of the first mode signal and outputting the low-frequency receiving signal to the low-band duplexer and receiving the high-frequency receiving signal of the first mode signal and outputting the high-frequency receiving signal to the high-band duplexer.
5. The RF front-end module of claim 4, further comprising a low frequency receive filter and a high frequency receive filter; wherein:
the low-frequency receiving filter is used for receiving the low-frequency receiving signal of the second mode signal sent by the antenna switch module, filtering the low-frequency receiving signal of the second mode signal and outputting the filtered low-frequency receiving signal;
the high-frequency receiving filter is used for receiving the high-frequency receiving signal of the second mode signal sent by the antenna switch module, filtering the high-frequency receiving signal of the second mode signal and outputting the filtered high-frequency receiving signal;
the low-frequency band duplexer is also used for receiving and outputting a low-frequency receiving signal of the first mode signal sent by the antenna switch module;
and the high-band duplexer is also used for receiving and outputting the high-frequency receiving signal of the first mode signal sent by the antenna switch module.
6. The RF front-end module of claim 5, wherein:
the first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal; the second mode signal is a global system for mobile communications (GSM) signal.
7. A multimode radio frequency transceiver is applied to a multimode terminal, and is characterized in that the multimode radio frequency transceiver comprises:
the frequency conversion module is used for converting baseband transmission signals of various mode signals sent by the baseband chip into low-frequency transmission signals or high-frequency transmission signals corresponding to the mode signals under the control of the baseband chip;
and the output module is used for outputting the low-frequency transmitting signal converted by the frequency conversion module through a low-frequency band transmitting port and outputting the high-frequency transmitting signal converted by the frequency conversion module through a high-frequency band transmitting port.
8. The multimode radio frequency transceiver of claim 7, wherein:
the various mode signals are Wideband Code Division Multiple Access (WCDMA) signals, Code Division Multiple Access (CDMA) signals, or global system for mobile communications (GSM) signals.
9. A multimode terminal comprises a baseband chip, a multimode radio frequency transceiver, a power amplification module and a radio frequency front end module which are connected in sequence, and is characterized in that:
the multi-mode radio frequency transceiver adopts the multi-mode radio frequency transceiver as claimed in claim 7 or 8;
the power amplification module adopts the power amplification module as claimed in claim 1, 2 or 3;
the radio frequency front end module adopts the radio frequency front end module as claimed in claim 4, 5 or 6.
10. A multimode terminal comprises a baseband chip, a multimode radio frequency transceiver, a power amplification module and a radio frequency front end module which are connected in sequence, and is characterized by also comprising a switch circuit positioned between the multimode radio frequency transceiver and the power amplification module;
the power amplification module adopts the power amplification module as claimed in claim 1, 2 or 3;
the radio frequency front end module adopts the radio frequency front end module as claimed in claim 4, 5 or 6;
the switching circuit is configured to switch a low-frequency transmission signal of the first mode signal or a low-frequency transmission signal of the second mode signal sent by the multimode rf transceiver to a low-frequency amplifier in the power amplification module, or switch a high-frequency transmission signal of the first mode signal or a high-frequency transmission signal of the second mode signal sent by the multimode rf transceiver to a high-frequency amplifier in the power amplification module.
11. A method for a multimode terminal to transmit a signal, the method comprising:
the power amplification module amplifies a low-frequency transmitting signal of the received first mode signal or a high-frequency transmitting signal of the first mode signal in a linear working mode under the control of the baseband chip and outputs the amplified low-frequency transmitting signal or the amplified high-frequency transmitting signal to the radio frequency front-end module; or, the power amplification module amplifies the received low-frequency transmission signal of the second mode signal or the high-frequency transmission signal of the second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified low-frequency transmission signal or the amplified high-frequency transmission signal to the radio frequency front-end module;
the radio frequency front end module transmits the received signal.
12. The method of claim 11, wherein:
the power amplification module amplifies a low-frequency transmission signal of a received first mode signal or a high-frequency transmission signal of the first mode signal in a linear working mode under the control of a baseband chip and outputs the amplified low-frequency transmission signal or the amplified high-frequency transmission signal to a radio frequency front end module, and the power amplification module comprises:
a low-frequency amplifier in the power amplification module amplifies a low-frequency transmitting signal of a received first mode signal in a linear working mode under the control of a baseband chip and outputs the amplified low-frequency transmitting signal to a radio frequency front-end module; or
A high-frequency amplifier in the power amplification module amplifies a high-frequency transmitting signal of a received first mode signal in a linear working mode under the control of a baseband chip and outputs the amplified high-frequency transmitting signal to a radio frequency front-end module; or,
the power amplification module amplifies a low-frequency transmission signal of a received second mode signal or a high-frequency transmission signal of the second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified low-frequency transmission signal or the amplified high-frequency transmission signal to the radio frequency front end module, and the power amplification module comprises:
a low-frequency amplifier in the power amplification module amplifies a low-frequency transmitting signal of a received second mode signal in a saturation working mode under the control of a baseband chip and outputs the amplified low-frequency transmitting signal to a radio frequency front-end module; or
And the high-frequency amplifier in the power amplification module amplifies the received high-frequency transmitting signal of the second mode signal in a saturation working mode under the control of the baseband chip and outputs the amplified high-frequency transmitting signal to the radio frequency front-end module.
13. The method of claim 12, wherein:
before the low frequency amplifier amplifies the received signal, the method further comprises:
the multimode radio frequency transceiver carries out frequency conversion on the first mode baseband transmission signal or the second mode baseband transmission signal sent by the baseband chip to a corresponding low-frequency transmission signal, and then outputs the low-frequency transmission signal to the low-frequency amplifier; or the switching circuit switches the low-frequency transmitting signal of the first mode signal or the low-frequency transmitting signal of the second mode signal sent by the multi-mode radio frequency transceiver to the low-frequency amplifier; or
Before the high frequency amplifier amplifies the received signal, the method further comprises:
the multimode radio frequency transceiver carries out frequency conversion on the first mode baseband transmission signal or the second mode baseband transmission signal sent by the baseband chip to a corresponding high-frequency transmission signal, and then outputs the high-frequency transmission signal to the high-frequency amplifier; or the switching circuit switches the high-frequency transmitting signal of the first mode signal or the high-frequency transmitting signal of the second mode signal sent by the multi-mode radio frequency transceiver to the high-frequency amplifier.
14. The method according to any of claims 11-13, wherein:
the first mode signal is a Wideband Code Division Multiple Access (WCDMA) signal or a Code Division Multiple Access (CDMA) signal; the second mode transmission signal is a global system for mobile communications (GSM) signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103477485A CN102404022A (en) | 2011-11-04 | 2011-11-04 | Power amplification module, radio frequency front end module and multi-mode terminal |
| PCT/CN2012/076030 WO2013063924A1 (en) | 2011-11-04 | 2012-05-25 | Power amplification module, radio frequency front-end module and multi-mode terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103477485A CN102404022A (en) | 2011-11-04 | 2011-11-04 | Power amplification module, radio frequency front end module and multi-mode terminal |
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| Publication Number | Publication Date |
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| CN102404022A true CN102404022A (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103477485A Pending CN102404022A (en) | 2011-11-04 | 2011-11-04 | Power amplification module, radio frequency front end module and multi-mode terminal |
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| CN (1) | CN102404022A (en) |
| WO (1) | WO2013063924A1 (en) |
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Application publication date: 20120404 |