CN-114362692-B - Amplifier device and duplexer circuit

Abstract

An amplifier device and a duplexer circuit. The amplifier device includes a first differential amplifying circuit and a controller. The first differential amplifying circuit comprises a first radio frequency input end, a second radio frequency input end, a first transistor, a second transistor, a first adjustable capacitance circuit, a second adjustable capacitance circuit and a first radio frequency output end. The controller is used for adjusting the capacitance values of the first adjustable capacitance circuit of the first differential amplification circuit and the second adjustable capacitance circuit of the first differential amplification circuit according to at least one of the characteristics related to the first radio frequency input signal of the first differential amplification circuit, the characteristics related to the second radio frequency input signal of the first differential amplification circuit, the matching error between the first transistor and the second transistor of the first differential amplification circuit and the characteristics of the amplifier device.

Inventors

• LI YUJUN
• ZHAO CHUANZHEN

Assignees

• 立积电子股份有限公司
• 立积电子股份有限公司

Dates

Publication Date

20260421

Application Date

20201211

Priority Date

20201014

Claims (20)

1. 1. An amplifier device, comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end; A second transistor having a first end and a control end coupled to the second RF input end, wherein the control end obtains the second RF input signal through the second RF input end, and the second transistor amplifies the second RF input signal and generates a second amplified RF signal at the first end; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor, and A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, Wherein the first amplified RF signal is combined with the coupled second RF input signal to form the first RF output signal, the second amplified RF signal is combined with the coupled first RF input signal to form the second RF output signal, and A controller, coupled to the first adjustable capacitance circuit of the first differential amplification circuit and the second adjustable capacitance circuit of the first differential amplification circuit, for adjusting capacitance values of the first adjustable capacitance circuit of the first differential amplification circuit and the second adjustable capacitance circuit of the first differential amplification circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplification circuit, a characteristic related to the second radio frequency input signal of the first differential amplification circuit, a matching error between the first transistor and the second transistor of the first differential amplification circuit, and a characteristic of the amplifier device, the first adjustable capacitance circuit of the first differential amplification circuit and the second adjustable capacitance circuit of the first differential amplification circuit being configured to at least partially cancel parasitic capacitance between the control terminal of the first transistor and the first terminal of the first transistor, and at least partially cancel parasitic capacitance between the control terminal of the second transistor and the second terminal of the second transistor, respectively.
2. 2. The amplifier device of claim 1, wherein the characteristic of the amplifier device is signal amplification linearity of the amplifier device, and the controller adjusts capacitance values in the first and second tunable capacitance circuits according to a second order cut-off point related to the signal amplification linearity of the amplifier device.
3. 3. The amplifier device of claim 1, wherein the characteristics of the amplifier device comprise an operating current of the amplifier device and a gain of the amplifier device.
4. 4. The amplifier device of claim 1, wherein the characteristic associated with the first rf input signal is a frequency of the first rf input signal, a frequency of the first rf output signal, a power of the first rf input signal, or a power of the first rf output signal, and the characteristic associated with the second rf input signal is a frequency of the second rf input signal, a frequency of the second rf output signal, a power of the second rf input signal, or a power of the second rf output signal.
5. 5. The amplifier device of claim 1, wherein the components of the amplifier device are fabricated from a group iii-v compound material.
6. 6. An amplifier device, comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end; A second transistor having a first end and a control end coupled to the second RF input end, wherein the control end obtains the second RF input signal through the second RF input end, and the second transistor amplifies the second RF input signal and generates a second amplified RF signal at the first end; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor, and A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, Wherein the first amplified RF signal is combined with the coupled second RF input signal to form the first RF output signal, the second amplified RF signal is combined with the coupled first RF input signal to form the second RF output signal, and A controller coupled to the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit for adjusting capacitance values of the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplifier circuit, a characteristic related to the second radio frequency input signal of the first differential amplifier circuit, a matching error between the first transistor and the second transistor of the first differential amplifier circuit, and a characteristic of the amplifier device; A second differential amplifying circuit comprising: the first radio frequency input end is coupled with the first radio frequency output end of the first differential amplifying circuit and is used for inputting a first radio frequency input signal; the second radio frequency input end is coupled with the second radio frequency output end of the first differential amplifying circuit and is used for inputting a first radio frequency input signal; a first transistor having a first end, a control end and a second end coupled to the first RF input end; a second transistor having a first terminal, a control terminal, and a second terminal coupled to the second RF input terminal; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor; A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, The controller is further configured to adjust capacitance values of the first adjustable capacitance circuit of the second differential amplification circuit and the second adjustable capacitance circuit of the second differential amplification circuit according to at least one of a characteristic related to the first radio frequency input signal of the second differential amplification circuit, a characteristic related to the second radio frequency input signal of the second differential amplification circuit, a matching error between the first transistor and the second transistor of the second differential amplification circuit, and a characteristic of the amplifier device.
7. 7. The amplifier device of claim 6, wherein the characteristic associated with the first rf input signal is the power of the first rf input signal or the power of the first rf output signal, and the characteristic associated with the second rf input signal is the power of the second rf input signal or the power of the second rf output signal, the characteristic of the amplifier device being the signal amplification linearity of the amplifier device; The controller is used for adjusting capacitance values of the first adjustable capacitance circuit of the first differential amplifying circuit and the second adjustable capacitance circuit of the first differential amplifying circuit according to characteristics related to the first radio frequency input signal or characteristics related to the second radio frequency input signal, and the controller is used for adjusting capacitance values of the first adjustable capacitance circuit of the second differential amplifying circuit and the second adjustable capacitance circuit of the second differential amplifying circuit according to characteristics of the amplifier device.
8. 8. The amplifier apparatus of claim 6, wherein the second differential amplifying circuit further comprises: a third adjustable capacitor circuit coupled between the control terminal of the first transistor and a reference voltage terminal, and A fourth adjustable capacitor circuit coupled between the control terminal of the second transistor and the reference voltage terminal; The controller is further coupled to the third adjustable capacitance circuit of the second differential amplification circuit and the fourth adjustable capacitance circuit of the second differential amplification circuit, and is further configured to adjust capacitance values of the third adjustable capacitance circuit of the second differential amplification circuit and the fourth adjustable capacitance circuit of the second differential amplification circuit according to at least one of a characteristic related to the first radio frequency input signal of the second differential amplification circuit, a characteristic related to the second radio frequency input signal of the second differential amplification circuit, a matching error between the first transistor and the second transistor of the second differential amplification circuit, and a characteristic of the amplifier device.
9. 9. The amplifier apparatus of claim 6, wherein the control terminal of the first transistor of the second differential amplifying circuit is coupled to the control terminal of the second transistor of the first differential amplifying circuit, and the control terminal of the second transistor of the second differential amplifying circuit is coupled to the control terminal of the first transistor of the first differential amplifying circuit.
10. 10. An amplifier device, comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end; A second transistor having a first end and a control end coupled to the second RF input end, wherein the control end obtains the second RF input signal through the second RF input end, and the second transistor amplifies the second RF input signal and generates a second amplified RF signal at the first end; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor, and A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, Wherein the first amplified RF signal is combined with the coupled second RF input signal to form the first RF output signal, the second amplified RF signal is combined with the coupled first RF input signal to form the second RF output signal, and A controller coupled to the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit for adjusting capacitance values of the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplifier circuit, a characteristic related to the second radio frequency input signal of the first differential amplifier circuit, a matching error between the first transistor and the second transistor of the first differential amplifier circuit, and a characteristic of the amplifier device; the second end of the first transistor of the first differential amplifying circuit is coupled to a reference voltage end through a first through-wafer via, and the second end of the second transistor of the first differential amplifying circuit is coupled to the reference voltage end through a second through-wafer via.
11. 11. An amplifier device, comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end; A second transistor having a first end and a control end coupled to the second RF input end, wherein the control end obtains the second RF input signal through the second RF input end, and the second transistor amplifies the second RF input signal and generates a second amplified RF signal at the first end; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor, and A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, Wherein the first amplified RF signal is combined with the coupled second RF input signal to form the first RF output signal, the second amplified RF signal is combined with the coupled first RF input signal to form the second RF output signal, and A controller coupled to the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit for adjusting capacitance values of the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplifier circuit, a characteristic related to the second radio frequency input signal of the first differential amplifier circuit, a matching error between the first transistor and the second transistor of the first differential amplifier circuit, and a characteristic of the amplifier device; Wherein the first and second adjustable capacitance circuits respectively comprise at least one switch for controlling to adjust capacitance values in the first and second adjustable capacitance circuits; The at least one switch is turned on when the power of the first radio frequency output signal or the second radio frequency output signal is higher than a preset power value, and is turned off when the power of the first radio frequency output signal or the second radio frequency output signal is lower than the preset power value.
12. 12. An amplifier device, comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end; A second transistor having a first end and a control end coupled to the second RF input end, wherein the control end obtains the second RF input signal through the second RF input end, and the second transistor amplifies the second RF input signal and generates a second amplified RF signal at the first end; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor, and A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, Wherein the first amplified RF signal is combined with the coupled second RF input signal to form the first RF output signal, the second amplified RF signal is combined with the coupled first RF input signal to form the second RF output signal, and A controller coupled to the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit for adjusting capacitance values of the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplifier circuit, a characteristic related to the second radio frequency input signal of the first differential amplifier circuit, a matching error between the first transistor and the second transistor of the first differential amplifier circuit, and a characteristic of the amplifier device; Further comprises: N-1 differential amplifying circuits, N is a positive integer greater than 2, wherein each differential amplifying circuit comprises: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a first RF input signal; a first transistor having a first end, a control end and a second end coupled to the first RF input end; a second transistor having a first terminal, a control terminal, and a second terminal coupled to the second RF input terminal; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor; A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and The second radio frequency output end is coupled with the first end of the second transistor and is used for outputting a second radio frequency output signal; The first RF input end of the nth differential amplifying circuit is coupled to the first RF output end of the nth differential amplifying circuit, the second RF input end of the nth differential amplifying circuit is coupled to the second RF output end of the nth differential amplifying circuit, the controller is further coupled to the first adjustable capacitance circuit of the nth differential amplifying circuit and the second adjustable capacitance circuit of the nth differential amplifying circuit, and the controller is further used for adjusting at least one of the first adjustable capacitance circuit of the nth differential amplifying circuit and the second adjustable capacitance circuit of the nth differential amplifying circuit according to the characteristic related to the first RF input signal of the nth differential amplifying circuit, the characteristic related to the second RF input signal of the nth differential amplifying circuit, the matching error between the first transistor and the second transistor of the nth differential amplifying circuit and the characteristic of the amplifier device, wherein N is a positive integer greater than or equal to 2.
13. 13. The amplifier apparatus of claim 12, wherein the controller is further configured to adjust the capacitance of the first adjustable capacitive circuit of the nth differential amplifying circuit and the second adjustable capacitive circuit of the nth differential amplifying circuit according to the signal amplification linearity of the amplifier apparatus.
14. 14. An amplifier device, comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end; A second transistor having a first end and a control end coupled to the second RF input end, wherein the control end obtains the second RF input signal through the second RF input end, and the second transistor amplifies the second RF input signal and generates a second amplified RF signal at the first end; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor, and A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, Wherein the first amplified RF signal is combined with the coupled second RF input signal to form the first RF output signal, the second amplified RF signal is combined with the coupled first RF input signal to form the second RF output signal, and A controller coupled to the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit for adjusting capacitance values of the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplifier circuit, a characteristic related to the second radio frequency input signal of the first differential amplifier circuit, a matching error between the first transistor and the second transistor of the first differential amplifier circuit, and a characteristic of the amplifier device; the first tunable capacitance circuit includes: A first capacitor having a first end coupled to one end of the first tunable capacitor circuit; a capacitive coupling switch controlled by the controller to change its on state or its off capacitance, a first end coupled to a second end of the first capacitor, and A second capacitor having a first end coupled to a second end of the capacitive coupling switch and a second end coupled to the other end of the first adjustable capacitive circuit, or The second tunable capacitance circuit further includes: a first capacitor having a first end coupled to one end of the second tunable capacitor circuit; a capacitive coupling switch controlled by the controller to change its on state or its off capacitance, a first end coupled to a second end of the first capacitor, and And a second capacitor, the first end of which is coupled with a second end of the capacitive coupling switch, and the second end of which is coupled with the other end of the second adjustable capacitance circuit.
15. 15. An amplifier device, comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; the control end of the first transistor obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at a first end of the first transistor; A second transistor, the control end of which obtains the second radio frequency input signal through the second radio frequency input end, the second transistor amplifies the second radio frequency input signal and generates a second amplified radio frequency signal at a first end of the second transistor; A first adjustable capacitor circuit having a first end coupled to the control end of the first transistor for receiving a first voltage and a second end coupled to the first end of the second transistor for receiving a second voltage, the first adjustable capacitor circuit being for coupling the first RF input signal to the first end of the second transistor, the capacitance of the first adjustable capacitor circuit being controlled by the first voltage and the second voltage, and A second adjustable capacitor circuit, a first end of which is coupled with the control end of the second transistor and used for receiving a third voltage, a second end of which is coupled with the first end of the first transistor and used for receiving a fourth voltage, the second adjustable capacitor circuit is used for coupling the second radio frequency input signal to the first end of the first transistor, and the capacitance value of the second adjustable capacitor circuit is controlled by the third voltage and the fourth voltage; Wherein the first amplified rf signal is combined with the coupled second rf input signal to form a first rf output signal, and the second amplified rf signal is combined with the coupled first rf input signal to form a second rf output signal; Wherein the first voltage is related to the first radio frequency input signal, the second voltage is related to the second radio frequency output signal, the third voltage is related to the second radio frequency input signal, and the fourth voltage is related to the first radio frequency output signal.
16. 16. The amplifier apparatus of claim 15, wherein the first adjustable capacitance circuit or the second adjustable capacitance circuit comprises: A capacitor transistor, wherein a control terminal of the capacitor transistor is used as one of a first terminal and a second terminal of the first adjustable capacitor circuit, and a first terminal of the capacitor transistor is connected with a second terminal to be used as the other one of the first terminal and the second terminal of the first adjustable capacitor circuit; Wherein, this capacitance transistor includes: a first well region; Forming two first type heavily doped regions of the first end and the second end of the capacitor transistor, which are arranged on the first type well region; a dielectric layer connecting the two first heavily doped regions, and The gate material forming the control terminal of the capacitor transistor is disposed on the dielectric layer.
17. 17. The amplifier apparatus of claim 16, wherein the first adjustable capacitance circuit or the second adjustable capacitance circuit further comprises: And a resistance-capacitance circuit coupled between the first end of the capacitance transistor and the second end of the first adjustable capacitance circuit.
18. 18. A duplexer circuit is characterized in that the duplexer circuit is coupled with an antenna, characterized in that the diplexer circuit comprises: a duplexer including an antenna end, a signal transmitting end and a signal receiving end; a power amplifier coupled to the signal transmitting end of the duplexer; a low noise amplifier coupled to the signal receiving end of the duplexer, and An amplifier device disposed on the power amplifier or the low noise amplifier, the amplifier device comprising: a first differential amplifying circuit comprising: a first RF input end for inputting a first RF input signal; a second RF input end for inputting a second RF input signal; The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end; A second transistor having a first end and a control end coupled to the second RF input end, wherein the control end obtains the second RF input signal through the second RF input end, and the second transistor amplifies the second RF input signal and generates a second amplified RF signal at the first end; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor, and A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, Wherein the first amplified RF signal is combined with the coupled second RF input signal to form the first RF output signal, the second amplified RF signal is combined with the coupled first RF input signal to form the second RF output signal, and The controller is coupled to the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit, and is configured to adjust capacitance values of the first adjustable capacitance circuit of the first differential amplifier circuit and the second adjustable capacitance circuit of the first differential amplifier circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplifier circuit, a characteristic related to the second radio frequency input signal of the first differential amplifier circuit, a matching error between the first transistor and the second transistor of the first differential amplifier circuit, and a characteristic of the amplifier device.
19. 19. The duplexer circuit of claim 18, wherein the amplifier means is disposed in the low noise amplifier, the amplifier means is characterized by signal amplification linearity of the amplifier means, and the controller adjusts capacitance values in the first and second tunable capacitance circuits according to a second order cut-off point related to the signal amplification linearity of the amplifier means.
20. 20. The diplexer circuit of claim 18, wherein the amplifier means is disposed to the power amplifier, further comprising: A second differential amplifying circuit comprising: the first radio frequency input end is coupled with the first radio frequency output end of the first differential amplifying circuit and is used for inputting a first radio frequency input signal; the second radio frequency input end is coupled with the second radio frequency output end of the first differential amplifying circuit and is used for inputting a first radio frequency input signal; a first transistor having a first end, a control end and a second end coupled to the first RF input end; a second transistor having a first terminal, a control terminal, and a second terminal coupled to the second RF input terminal; A first adjustable capacitor circuit coupled between the control terminal of the first transistor and the first terminal of the second transistor; A second adjustable capacitor circuit coupled between the control terminal of the second transistor and the first terminal of the first transistor; A first RF output terminal coupled to the first end of the first transistor for outputting a first RF output signal, and A second RF output terminal coupled to the first terminal of the second transistor for outputting a second RF output signal, The controller is further coupled to the first adjustable capacitance circuit of the second differential amplifying circuit and the second adjustable capacitance circuit of the second differential amplifying circuit, and adjusts capacitance values of the first adjustable capacitance circuit of the second differential amplifying circuit and the second adjustable capacitance circuit of the second differential amplifying circuit.

Description

Amplifier device and duplexer circuit Technical Field The present invention relates to a circuit structure of a wireless communication system, and more particularly, to an amplifier device and a multiplexer circuit. Background Wireless communication devices of the double-ended/differential type are increasing, and thus radio frequency amplifier devices that match the double-ended/differential type antennas are also being studied and practiced. However, since the rf amplifier device with the dual-end/differential circuit topology has problems such as a matching error between the differential pair of transistors and loss of signal power, how to reduce the above problems is still a direction of research in the wireless communication field. Disclosure of Invention The amplifier device of the present invention includes a first differential amplifying circuit and a controller. The first differential amplifying circuit comprises a first radio frequency input end, a second radio frequency input end, a first transistor, a second transistor, a first adjustable capacitance circuit, a second adjustable capacitance circuit, a first radio frequency output end and a second radio frequency output end. The first radio frequency input end is used for inputting a first radio frequency input signal. The second radio frequency input end is used for inputting a second radio frequency input signal. The first transistor is provided with a first end and a control end coupled with the first radio frequency input end, wherein the control end obtains the first radio frequency input signal through the first radio frequency input end, and the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end. The second transistor is provided with a first end and a control end coupled with the second radio frequency input end, wherein the control end obtains the second radio frequency input signal through the second radio frequency input end, and the second transistor amplifies the second radio frequency input signal and generates a second amplified radio frequency signal at the first end. The first adjustable capacitance circuit is coupled between the control terminal of the first transistor and the first terminal of the second transistor for coupling the first RF input signal to the first terminal of the second transistor. The second adjustable capacitor circuit is coupled between the control terminal of the second transistor and the first terminal of the first transistor for coupling the second RF input signal to the first terminal of the first transistor. The first radio frequency output end is coupled with the first end of the first transistor and is used for outputting a first radio frequency output signal. The second RF output terminal is coupled to the first terminal of the second transistor for outputting a second RF output signal. The first amplified rf signal is combined with the coupled second rf input signal to form the first rf output signal, and the second amplified rf signal is combined with the coupled first rf input signal to form the second rf output signal. The controller is coupled to the first adjustable capacitance circuit of the first differential amplification circuit and the second adjustable capacitance circuit of the first differential amplification circuit, and is configured to adjust capacitance values of the first adjustable capacitance circuit of the first differential amplification circuit and the second adjustable capacitance circuit of the first differential amplification circuit according to at least one of a characteristic related to the first radio frequency input signal of the first differential amplification circuit, a characteristic related to the second radio frequency input signal of the first differential amplification circuit, a matching error between the first transistor and the second transistor of the first differential amplification circuit, and a characteristic of the amplifier device. The amplifier device of the present invention includes a first differential amplifying circuit. The first differential amplifying circuit comprises a first radio frequency input end, a second radio frequency input end, a first transistor, a second transistor, a first adjustable capacitance circuit and a second adjustable capacitance circuit. The first radio frequency input end is used for inputting a first radio frequency input signal. The second radio frequency input end is used for inputting a second radio frequency input signal. The control end of the first transistor obtains the first radio frequency input signal through the first radio frequency input end, the first transistor amplifies the first radio frequency input signal and generates a first amplified radio frequency signal at the first end of the first transistor. The control end of the second transistor obtains the second radio frequency input signal through the second radio