Radio frequency transceiver circuit and related circuit group

Abstract

The invention discloses a radio frequency transceiver circuit and a related circuit group. The radio frequency transceiver circuit comprises a transmission circuit, a receiving circuit and a pre-distortion processing circuit. The transmission circuit is used for generating a transmission signal, wherein the transmission signal is transmitted to an antenna through a first pin. The receiving circuit is used for receiving a receiving signal through a second pin. The pre-distortion processing circuit is used for receiving a feedback signal from a third pin and calculating distortion information of the transmission signal according to the feedback signal so as to generate a compensation signal to the transmission circuit to perform a pre-distortion compensation operation, and the feedback signal is generated according to a coupling signal of the transmission signal.

Description

Technical Field

[0001] The invention relates to a radio frequency transceiver circuit. Background Art

[0002] In current RF transmitters, in order to achieve high-power output, an external front-end module (eFEM) is usually set between the RF transmitter and the antenna. However, the external front-end module often produces nonlinear phenomena in the circuit, which in turn causes greater distortion of the RF signal transmitted through the antenna. In order to solve the problem of RF signal distortion, traditionally, the RF signal transmitted through the antenna is obtained in the external front-end module for analysis so that the RF transmitter can use digital pre-distortion to perform nonlinear compensation. However, the RF signal obtained in the external front-end module is easily affected by other coupled signals, which will affect the effect of digital pre-distortion compensation. Therefore, how to obtain appropriate RF signals for analysis for digital pre-distortion compensation is an important issue. Summary of the invention

[0003] Therefore, one of the objectives of the present invention is to provide a radio frequency transceiver circuit and a related circuit assembly, which can obtain an appropriate feedback signal for analysis to perform digital pre-distortion compensation, so as to solve the problems described in the prior art.

[0004] In one embodiment of the present invention, a radio frequency transceiver circuit is disclosed, which includes a transmitting circuit, a receiving circuit and a pre-distortion processing circuit. The transmitting circuit is used to generate a transmission signal, wherein the transmission signal is transmitted to an antenna through a first pin. The receiving circuit is used to receive a reception signal through a second pin. The pre-distortion processing circuit is used to receive a feedback signal from a third pin, and calculate the distortion information of the transmission signal according to the feedback signal, so as to generate a compensation signal to the transmitting circuit for performing a pre-distortion compensation operation, wherein the feedback signal is generated according to a coupling signal of the transmission signal.

[0005] In one embodiment of the present invention, a circuit group is disclosed, which includes a radio frequency transceiver circuit, an external front-end module, a coupler and a matching circuit. The radio frequency transceiver circuit includes a first pin, a second pin and a third pin. The external front-end module includes a power amplifier and a low noise amplifier, wherein the power amplifier is used to amplify a transmission signal from the first pin and transmit it through an antenna; and the low noise amplifier is used to receive a signal from the antenna to generate a reception signal to the second pin. The coupler is used to generate a coupling signal according to the transmission signal. The matching circuit is used to generate a feedback signal to the third pin according to the coupling signal, so that the radio frequency transceiver circuit can perform a pre-distortion compensation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 FIG. 4 is a schematic diagram of a circuit group according to an embodiment of the present invention. Figure 2 FIG. 4 is a schematic diagram of a pre-distortion processing circuit according to a first embodiment of the present invention. Figure 3 FIG. 4 is a schematic diagram of a pre-distortion processing circuit according to a second embodiment of the present invention. Figure 4 FIG. 4 is a schematic diagram of a receiving circuit and a pre-distortion processing circuit according to a first embodiment of the present invention. Figure 5 FIG. 4 is a schematic diagram of a receiving circuit and a pre-distortion processing circuit according to a second embodiment of the present invention. Figure 6 FIG. 4 is a schematic diagram of a receiving circuit and a pre-distortion processing circuit according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0007] Figure 1 FIG. 1 is a schematic diagram of a circuit assembly 100 according to an embodiment of the present invention. Figure 1 As shown, the circuit set 100 includes a coupler 110, an external front-end module 120, a matching circuit 130 and a radio frequency transceiver circuit 140. The radio frequency transceiver circuit 140 is a radio frequency transceiver chip, and includes at least three pins P1-P3, a transmitting circuit 142, a receiving circuit 144 and a pre-distortion processing circuit 146. The external front-end module 120 includes a switch SW1, a power amplifier 122 and a low noise amplifier 124. In this embodiment, the circuit set 100 can be set in any electronic device that needs to transmit and receive wireless signals, and transmit and receive wireless signals through an antenna 102.

[0008] In the operation of the circuit group 100, the RF transceiver circuit 140 includes the functions of signal transmission and signal reception. Specifically, when the RF transceiver circuit 140 performs a signal transmission operation, the transmission circuit 142 may include a digital-to-analog converter, a mixer, a power amplifier, and other related circuits to generate a transmission signal VT, and the transmission signal VT is transmitted to the external front-end module 120 through the pin P1 and amplified by the power amplifier 122, and then transmitted to the remote electronic device through the switch SW1 and the antenna 102. When the RF transceiver circuit 140 performs a signal reception operation, the switch SW1 switches to the low-noise amplifier 124 below, and at this time, the signal from the antenna 102 generates a reception signal VR through the switch SW1 and the low-noise amplifier 124, and the receiving circuit 144 receives the reception signal VR through the pin P2 and processes it.

[0009] In addition, due to the nonlinearity of the power amplifier inside the transmission circuit 142 and the power amplifier 122 of the external front-end module 120, the transmission signal VT transmitted through the antenna 102 will be distorted. Therefore, the present embodiment designs a coupler 110 and a matching circuit 130 to generate a feedback signal VFB to the pre-distortion processing circuit 146 of the RF transceiver circuit 140 to pre-compensate the transmission signal VT generated by the transmission circuit 142. Specifically, the transmission circuit 142 can generate a plurality of test signals as the transmission signal VT, wherein the plurality of test signals include different intensities. The coupler 110 can be composed of two coupled transmission lines, which are used to generate a coupling signal according to the transmission signal VT. It should be noted that since the coupler is located between the external front-end module 120 and the antenna 102, the transmission signal VT at this time has been affected by the power amplifier 122 and is distorted, so the coupling signal reflects the distorted transmission signal VT. On the other hand, the matching circuit 130 includes an impedance matching circuit and may also include a gain adjustment circuit, such as an attenuator, to adjust the strength of the coupling signal to generate a feedback signal VFB, and the feedback signal VFB is transmitted to the pre-distortion processing circuit 146 through the pin P3.

[0010] In this embodiment, since the matching circuit 130 and the external front-end module 120 are two different components or two different chips, there is a better isolation between the matching circuit 130 and the power amplifier 122 of the external front-end module 120, so that the transmission signal VT will not be coupled to the matching circuit 130 through the external front-end module 120 and affect the feedback signal VFB. In addition, since the pin P3 is far away from the pin P1, the transmission signal VT is less likely to be coupled to the winding near the pin P3 through the winding near the pin P1. As described above, through the design of the circuit group 100, the feedback signal VFB can accurately reflect the transmission signal VT transmitted through the antenna 102 without being affected by other signals. Therefore, the feedback signal VFB can be better analyzed and processed by the pre-distortion processing circuit 146 to generate a better compensation signal, so that the transmission circuit 142 can perform a digital pre-distortion compensation operation to offset the nonlinear effect of the external front-end module 120. As a result, the pre-distortion compensated transmission signal VT still has better linearity after being processed by the external front-end module 120 .

[0011] Figure 2 FIG. 1 is a schematic diagram of a predistortion processing circuit 146 according to a first embodiment of the present invention. Figure 2As shown, the pre-distortion processing circuit 146 includes a matching circuit 210, a filter 220, a mixer 230, an amplifier 240, a filter 250, an analog-to-digital converter 260 and a digital processing circuit 270. In the operation of the pre-distortion processing circuit 146, the matching circuit 210 includes an impedance matching circuit. The filter 220 filters the feedback signal VFB through the matching circuit 210 to select the required frequency to generate a filtered signal. In this embodiment, the required frequency is the frequency of the transmission signal VT, so that the filter 220 can remove the image signal of the feedback signal VFB. Then, the mixer 230 uses an oscillation signal LO to perform a frequency reduction operation on the filtered signal to generate a mixed signal. In this embodiment, the oscillation signal LO includes four oscillation signals with different phases, and the mixer 230 uses the oscillation signal LO to perform a frequency reduction operation on the filtered signal to generate four mixed signals, but the present invention is not limited thereto. Next, the amplifier 240 performs an amplification operation on the mixed signal to generate an amplified signal. In the present embodiment, the amplifier 240 performs an amplification operation on four mixed signals to generate four amplified signals, but the present invention is not limited thereto. The filter 250 performs a low-pass filtering operation on the amplified signal to generate a low-pass filtered signal. The analog-to-digital converter 260 performs an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal. Finally, the digital processing circuit 270 analyzes and processes the digital signal to generate a compensation signal for the transmission circuit 142 to perform a pre-distortion compensation operation. In one embodiment, the digital processing circuit 270 can obtain an original digital signal (i.e., the original digital value of the test signal) corresponding to the transmission signal VT from the transmission circuit 142, and calculate the distortion information of the transmission signal VT according to the difference between the original digital signal and the digital signal generated by the analog-to-digital converter 260 to generate the compensation signal. It should be noted that the detailed operation of the digital processing circuit 270 calculating the distortion information of the transmission signal VT and generating the compensation signal for the transmission circuit 142 to perform the pre-distortion compensation operation is well known to those skilled in the art, and thus the details are not repeated here.

[0012] Figure 3 FIG. 1 is a schematic diagram of a pre-distortion processing circuit 146 according to a second embodiment of the present invention. Figure 3As shown, the pre-distortion processing circuit 146 includes a matching circuit 310, a single-ended to differential converter 320, a filter 330, a mixer 340, an amplifier 350, a filter 360, an analog-to-digital converter 370 and a digital processing circuit 380. In the operation of the pre-distortion processing circuit 146, the matching circuit 310 includes an impedance matching circuit. The single-ended to differential converter 320 converts the feedback signal VFB into a differential signal through the matching circuit 310. The filter 330 filters the differential signal to select a required frequency to generate a filtered signal, wherein in this embodiment, the required frequency is the frequency of the transmission signal VT. Then, the mixer 340 uses an oscillation signal LO to perform a frequency reduction operation on the filtered signal to generate a mixed signal. In this embodiment, the oscillation signal LO includes four oscillation signals with different phases, and the mixer 340 uses the oscillation signal LO to perform a frequency reduction operation on the filtered signal to generate four mixed signals, but the present invention is not limited thereto. Next, the amplifier 350 performs an amplification operation on the mixed signal to generate an amplified signal. The filter 360 performs a low-pass filtering operation on the amplified signal to generate a low-pass filtered signal. The analog-to-digital converter 370 performs an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal. Finally, the digital processing circuit 380 analyzes and processes the digital signal to generate a compensation signal for the transmission circuit 142 to perform a pre-distortion compensation operation.

[0013] Figure 4 1 is a schematic diagram of a receiving circuit 144 and a pre-distortion processing circuit 146 according to a first embodiment of the present invention. In this embodiment, the receiving circuit 144 and the pre-distortion processing circuit 146 include a matching circuit 410, a filter 420, a low noise amplifier 430, two switches SW2 and SW3, a transformer 440, a mixer 450, an amplifier 460, a filter 470, an analog-to-digital converter 480, and a digital processing circuit 490. In this embodiment, the low noise amplifier 430, the transformer 440, and the mixer 450 are components in the receiving circuit 144, and the pre-distortion processing circuit 146 can reduce the number of components in the pre-distortion processing circuit 146 by using the mixer 450 in the receiving circuit 144 to generate the compensation signal, thereby reducing the manufacturing cost.

[0014] In detail, Figure 4In the operation of the embodiment, when the RF transceiver circuit 140 operates in a receiving mode, the receiving circuit 144 obtains a receiving signal VR through the antenna 102 and the external front-end module 120. The receiving signal VR is processed by the low noise amplifier 430, the transformer 440 and the mixer 450 and then transmitted to the back-end circuit (not shown) for processing, and at this time, the pre-distortion processing circuit 146 can stop operating or be turned off, and the switches SW2 and SW3 can disconnect the connection between the receiving circuit 144 and the pre-distortion processing circuit 146.

[0015] When the RF transceiver circuit 140 operates in a test mode, the transmission circuit 142 generates a plurality of test signals as the transmission signal VT, and the coupler 110 generates a coupling signal according to the transmission signal VT, and the coupling signal is processed by the matching circuit 130 to generate a feedback signal VFB to the pre-distortion processing circuit 146. At this time, the switch SW1 in the external front-end module 120 is switched to the power amplifier 122, so the receiving circuit 144 will not receive the signal from the antenna 102. In addition, one of the switches SW2 and SW3 shown in the figure can be enabled to link the receiving circuit 144 and the pre-distortion processing circuit 146. Figure 4In the operation of the embodiment of the present invention, the matching circuit 410 includes an impedance matching circuit. The filter 420 filters the feedback signal VFB through the matching circuit 410 to select the required frequency to generate a filtered signal. In the present embodiment, the required frequency is the frequency of the transmission signal VT. Then, if the switch SW2 is enabled, the filter signal is processed by the low noise amplifier 430 and the transformer 440 to generate a processed signal. If the switch SW3 is enabled, the filter signal is processed by the transformer 440 to generate a processed signal. Then, the mixer 450 uses an oscillation signal LO to perform a frequency reduction operation on the processed signal to generate a mixed signal. In the present embodiment, the oscillation signal LO includes four oscillation signals with different phases, and the mixer 230 uses the oscillation signal LO to perform a frequency reduction operation on the filtered signal to generate four mixed signals, but the present invention is not limited thereto. Then, the amplifier 460 amplifies the mixed signal to generate an amplified signal. The filter 470 performs a low-pass filtering operation on the amplified signal to generate a low-pass filtered signal. The analog-to-digital converter 480 performs an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal. Finally, the digital processing circuit 490 analyzes and processes the digital signal to generate a compensation signal for the transmission circuit 142 to perform a pre-distortion compensation operation. In one embodiment, the digital processing circuit 490 can obtain an original digital signal corresponding to the transmission signal VT from the transmission circuit 142, and calculate the distortion information of the transmission signal VT according to the difference between the original digital signal and the digital signal generated by the analog-to-digital converter 480 to generate the compensation signal. In short, when the RF transceiver circuit 140 operates in the test mode, the pre-distortion processing circuit 146 can use the mixer 450 and calculate the distortion information of the transmission signal VT according to the feedback signal VFB, so as to generate a compensation signal to the transmission circuit 142 for pre-distortion compensation operation.

[0016] Figure 51 is a schematic diagram of a receiving circuit 144 and a pre-distortion processing circuit 146 according to a second embodiment of the present invention. In this embodiment, the receiving circuit 144 and the pre-distortion processing circuit 146 include a matching circuit 510, a filter 520, two low noise amplifiers 530, 532, two switches SW2, SW3, an isolation circuit 534 including a switch SW4 and resistors R1, R2, a transformer 540, a mixer 550, an amplifier 560, a filter 570, an analog-to-digital converter 580 and a digital processing circuit 590. In this embodiment, the low noise amplifiers 530, 532, the isolation circuit 534, the transformer 540 and the mixer 550 are components in the receiving circuit 144, and the pre-distortion processing circuit 146 uses the mixer 550 in the receiving circuit 144 to generate the compensation signal, so that the number of components in the pre-distortion processing circuit 146 can be reduced, thereby reducing the manufacturing cost. In addition, since the distance between the pins P1 and P2 is relatively close, the transmission signal VT may affect the feedback signal VFB through the pin P2 . Therefore, the isolation circuit 534 is designed in this embodiment to reduce the interference from the pin P2 .

[0017] In detail, Figure 5 In the operation of the embodiment, when the RF transceiver circuit 140 operates in a receiving mode, the receiving circuit 144 obtains a receiving signal VR through the antenna 102 and the external front-end module 120. The receiving signal VR is processed by the low noise amplifier 530 / 532, the transformer 540 and the mixer 550 and then transmitted to the back-end circuit (not shown) for processing, and at this time, the pre-distortion processing circuit 146 can stop operating or be turned off, and the switches SW2 and SW3 can disconnect the connection between the receiving circuit 144 and the pre-distortion processing circuit 146.

[0018] When the RF transceiver circuit 140 operates in a test mode, the transmission circuit 142 generates a plurality of test signals as the transmission signal VT, and the coupler 110 generates a coupling signal according to the transmission signal VT, and the coupling signal is processed by the matching circuit 130 to generate a feedback signal VFB to the pre-distortion processing circuit 146. At this time, the switch SW1 in the external front-end module 120 is switched to the power amplifier 122, so the receiving circuit 144 will not receive the signal from the antenna 102. In addition, one of the switches SW2 and SW3 shown in the figure can be enabled to link the receiving circuit 144 and the pre-distortion processing circuit 146. Figure 5In the operation of the embodiment, the matching circuit 510 includes an impedance matching circuit, and the filter 520 filters the feedback signal VFB through the matching circuit 510 to select the required frequency to generate a filtered signal. Then, if the switch SW2 is enabled, the filter signal is processed by the low noise amplifier 530 and the transformer 540 to generate a processed signal. If the switch SW3 is enabled, the filter signal is processed by the transformer 540 to generate a processed signal. It should be noted that at this time, the low noise amplifier 532 is turned off, and since the isolation circuit 534 is designed to isolate the pin P2 from the input end of the low noise amplifier 530, the noise from the pin P2 or the strength of the coupled signal will be attenuated and will not affect the filtered signal from the filter 520. Then, since the operations of the mixer 550, the amplifier 560, the filter 570, the analog-to-digital converter 580 and the digital processing circuit 590 are the same as Figure 4 The components with the same names are not described in detail.

[0019] It should be noted that Figure 5 The circuit architecture of the isolation circuit 534 shown is merely an example and not a limitation of the present invention. That is, as long as the isolation circuit 534 can attenuate the strength of the noise or coupled signal from pin P2 to prevent the filtered signal entering the low-noise amplifier 530 through switch SW2 from being interfered with, the isolation circuit 534 can have any other different circuit architectures.

[0020] Figure 6 1 is a schematic diagram of a receiving circuit 144 and a pre-distortion processing circuit 146 according to a third embodiment of the present invention. In this embodiment, the receiving circuit 144 and the pre-distortion processing circuit 146 include a matching circuit 610, a single-ended to differential converter 620, a filter 630, a low noise amplifier 640, two switches SW5 and SW6, a transformer 650, a mixer 660, an amplifier 670, a filter 680, an analog-to-digital converter 690, and a digital processing circuit 692. In this embodiment, the low noise amplifier 640, the transformer 650, and the mixer 660 are components in the receiving circuit 144, and the pre-distortion processing circuit 146 can reduce the number of components in the pre-distortion processing circuit 146 by using the mixer 660 in the receiving circuit 144 to generate the compensation signal, thereby reducing the manufacturing cost.

[0021] In detail, Figure 6In the operation of the embodiment, when the RF transceiver circuit 140 operates in a receiving mode, the receiving circuit 144 obtains a receiving signal VR through the antenna 102 and the external front-end module 120. The receiving signal VR is processed by the low noise amplifier 640, the transformer 650 and the mixer 660 and then transmitted to the back-end circuit (not shown) for processing, and at this time, the pre-distortion processing circuit 146 can stop operating or be turned off, and the switches SW5 and SW6 can disconnect the connection between the receiving circuit 144 and the pre-distortion processing circuit 146.

[0022] When the RF transceiver circuit 140 operates in a test mode, the transmission circuit 142 generates a plurality of test signals as the transmission signal VT, and the coupler 110 generates a coupling signal according to the transmission signal VT, and the coupling signal is processed by the matching circuit 130 to generate a feedback signal VFB to the pre-distortion processing circuit 146. At this time, the switch SW1 in the external front-end module 120 is switched to the power amplifier 122, so the receiving circuit 144 will not receive the signal from the antenna 102. In addition, the switches SW5 and SW6 shown in the figure are enabled to link the receiving circuit 144 and the pre-distortion processing circuit 146. Figure 6In the operation of the embodiment, the matching circuit 610 includes an impedance matching circuit, and the single-ended to differential converter 620 converts the feedback signal VFB into a differential signal through the matching circuit 610. The filter 630 filters the differential signal to select the required frequency to generate a filtered signal. In the present embodiment, the required frequency is the frequency of the transmission signal VT. Then, the mixer 660 uses an oscillation signal LO to perform a frequency reduction operation on the filtered signal to generate a mixed signal. In the present embodiment, the oscillation signal LO includes four oscillation signals with different phases, and the mixer 660 uses the oscillation signal LO to perform a frequency reduction operation on the filtered signal to generate four mixed signals, but the present invention is not limited thereto. Then, the amplifier 670 amplifies the mixed signal to generate an amplified signal. The filter 680 performs a low-pass filtering operation on the amplified signal to generate a low-pass filtered signal. The analog-to-digital converter 690 performs an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal. Finally, the digital processing circuit 692 analyzes and processes the digital signal to generate a compensation signal for the transmission circuit 142 to perform a pre-distortion compensation operation. In one embodiment, the digital processing circuit 692 can obtain an original digital signal corresponding to the transmission signal VT from the transmission circuit 142, and calculate the distortion information of the transmission signal VT according to the difference between the original digital signal and the digital signal generated by the analog-to-digital converter 690 to generate the compensation signal. In short, when the RF transceiver circuit 140 operates in the test mode, the pre-distortion processing circuit 146 can use the mixer 660 and calculate the distortion information of the transmission signal VT according to the feedback signal VFB to generate the compensation signal to the transmission circuit 142 for pre-distortion compensation operation. The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Explanation of symbols

[0023] 100: Circuit Group 102: Antenna 110: Coupler 120: External front end module 122: Power Amplifier 124,430,530,532,640: Low noise amplifier 130: Matching circuit 140: RF transceiver circuit 142: Transmission circuit 144: Receiving circuit 146: Pre-distortion processing circuit 210,310,410,510,610: Matching circuit 220,330,420,520,630: Filter 230,340,450,550,660: mixer 240,350,460,560,670:Amplifier 250,360,470,570,680:Filter 260,370,480,580,690:Analog-to-digital converter 270,380,490,590,692: Digital processing circuit 320,620: Single-ended to differential converter 440,540,650: Transformer 534:Isolation circuit LO: Oscillation signal P1, P2, P3: Pins R1, R2: resistors SW1, SW2, SW3, SW4, SW5, SW6: switches VT: Transmit signal VR: Receive signal VFB: Feedback signal

Claims

1. A radio frequency transceiver circuit, characterized in that: Contains: A transmitting circuit for generating a transmitting signal, wherein the transmitting signal is transmitted to an antenna through a first pin; a receiving circuit for receiving a receiving signal through a second pin; as well as A predistortion processing circuit receives a feedback signal from a third pin and calculates distortion information of the transmission signal according to the feedback signal to generate a compensation signal to the transmission circuit for performing a predistortion compensation operation, wherein the feedback signal is generated according to a coupling signal of the transmission signal.

2. The radio frequency transceiver circuit according to claim 1, characterized in that: The pre-distortion processing circuit includes: a first filter for filtering the feedback signal to generate a filtered signal; a mixer for using an oscillating signal to perform a frequency reduction operation on the filtered signal to generate a mixed signal; a second filter, for performing a low-pass filtering operation on the mixed signal to generate a low-pass filtered signal; an analog-to-digital converter, used for performing an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal; as well as A digital processing circuit is used to calculate the distortion information of the transmission signal according to the digital signal to generate the compensation signal to the transmission circuit for performing the pre-distortion compensation operation.

3. The radio frequency transceiver circuit according to claim 1, characterized in that: The pre-distortion processing circuit includes: a single-ended to differential converter, for converting the feedback signal into a differential signal; a first filter for filtering the differential signal to generate a filtered signal; a mixer for using an oscillating signal to perform a frequency reduction operation on the filtered signal to generate a mixed signal; a second filter, for performing a low-pass filtering operation on the mixed signal to generate a low-pass filtered signal; an analog-to-digital converter, used for performing an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal; as well as A digital processing circuit is used to calculate the distortion information of the transmission signal according to the digital signal to generate the compensation signal to the transmission circuit for performing the pre-distortion compensation operation.

4. The radio frequency transceiver circuit according to claim 1, characterized in that: The receiving circuit includes: a low noise amplifier; A transformer; as well as A mixer; When the RF transceiver circuit operates in a receiving mode, the received signal is processed by the low noise amplifier, the transformer and the mixer in sequence; When the RF transceiver circuit operates in a test mode, the pre-distortion processing circuit uses the mixer to calculate the distortion information of the transmission signal according to the feedback signal. The compensation signal is generated to the transmitting circuit to perform the pre-distortion compensation operation.

5. The radio frequency transceiver circuit according to claim 4, characterized in that: The pre-distortion processing circuit includes: a first filter for filtering the feedback signal to generate a filtered signal, wherein the transformer and the mixer in the receiving circuit process the filtered signal to generate a mixed signal; a second filter, for performing a low-pass filtering operation on the mixed signal to generate a low-pass filtered signal; an analog-to-digital converter, used for performing an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal; as well as A digital processing circuit is used to calculate the distortion information of the transmission signal according to the digital signal to generate the compensation signal to the transmission circuit for performing the pre-distortion compensation operation.

6. The radio frequency transceiver circuit according to claim 5, characterized in that: The pre-distortion processing circuit includes: an isolation circuit coupled between the second pin and an input terminal of the low noise amplifier, Used to attenuate the strength of the noise or coupled signal from the second pin; The low noise amplifier, the transformer and the mixer in the receiving circuit process the filtered signal to generate the mixed signal.

7. The radio frequency transceiver circuit according to claim 4, characterized in that: The pre-distortion processing circuit includes: a single-ended to differential converter, for converting the feedback signal into a differential signal; a first filter for filtering the differential signal to generate a filtered signal, wherein the mixer in the receiving circuit processes the filtered signal to generate a mixed signal; a second filter, for performing a low-pass filtering operation on the mixed signal to generate a low-pass filtered signal; an analog-to-digital converter, used for performing an analog-to-digital conversion operation on the low-pass filtered signal to generate a digital signal; as well as A digital processing circuit is used to calculate the distortion information of the transmission signal according to the digital signal to generate the compensation signal to the transmission circuit for performing the pre-distortion compensation operation.

8. A circuit assembly, characterized in that: Contains: A radio frequency transceiver circuit comprises a first pin, a second pin and a third pin; An external front-end module, comprising a power amplifier and a low noise amplifier, wherein the power amplifier is used to amplify a transmission signal from the first pin and transmit it through an antenna; and the low noise amplifier is used to receive a signal from the antenna to generate a receiving signal to the second pin; a coupler, configured to generate a coupled signal according to the transmission signal; as well as a matching circuit, for generating a feedback signal to the third pin according to the coupling signal, This allows the radio frequency transceiver circuit to perform a pre-distortion compensation operation.

9. The circuit assembly according to claim 8, characterized in that: The radio frequency transceiver circuit includes: a transmission circuit for generating the transmission signal, wherein the transmission signal is transmitted to the external front-end module through the first pin; a receiving circuit, used for receiving the receiving signal through the second pin; as well as A pre-distortion processing circuit is used to receive the feedback signal from the third pin and calculate the distortion information of the transmission signal according to the feedback signal to generate the compensation signal to the transmission circuit for performing the pre-distortion compensation operation.

10. The circuit assembly according to claim 8, wherein: The matching circuit includes an impedance matching circuit and / or an attenuator.

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