Power amplifier switch and electronic equipment

Abstract

The utility model discloses a power amplifier switch and electronic equipment, which can effectively solve the problems that the output power and the power additional efficiency of the existing power amplifier switch are reduced, the size is large and the production cost is high through a reasonable modularization and multiplexing strategy. In the distributed efficacy switch, the N transistors with the amplification function are multiplexed, so that the M transistors are not only used for power amplifier output, but also used as the first isolation circuit, the dual utilization improves the power additional efficiency of the circuit, the introduction of additional elements is reduced, and the size of the whole circuit is further reduced. Besides, through accurate control of the first switching circuit and the second switching circuit, efficient isolation between the transmitting input end and the receiving output end is achieved, signal interference is reduced, the stability of the system is improved, the overall design is achieved by reducing elements, the isolation degree and the power efficiency are improved, and the cost is reduced. The problems that in an existing scheme, power and efficiency are reduced, the size is large, and cost is high can be solved.

Description

Technical Field

[0001] The utility model relates to the field of signal processing, in particular to a power amplifier switch and electronic equipment. Background Art

[0002] Among the current mainstream amplifier architectures, distributed structure power amplifier monolithic microwave integrated circuits are not restricted by the gain-bandwidth product and can achieve the coexistence of ultra-wide bandwidth and high gain, making them the preferred solution for the design of ultra-wideband high-power amplifiers.

[0003] A power amplifier switch usually consists of two parts: a power amplifier and a switch, such as Figure 1 As shown, there are two circuits inside the switch: the first part is located between the output end of the power amplifier and the common end, and the second part is located between the common end and the receiving output end ( Figure 1 By precisely controlling these two switching circuits, efficient isolation between the transmit input and receive output can be achieved.

[0004] However, the output power and power added efficiency of the existing power amplifier switch often decrease significantly after the power amplifier and the switch are combined. At the same time, the size of the power amplifier switch is relatively large, resulting in high production costs. Utility Model Content

[0005] The purpose of the present utility model is to provide a power amplifier switch and electronic device, which improves the power added efficiency of the circuit, reduces the introduction of additional components, and thus reduces the size of the overall circuit; in addition, through the precise control of the first and second switching circuits, efficient isolation is achieved between the transmitting input end and the receiving output end, reducing signal interference and improving system stability. The overall design can solve the problems of reduced power and efficiency, large size, and high cost existing in existing solutions by reducing components and improving isolation and power efficiency.

[0006] In order to solve the above technical problems, the present invention provides a power amplifier switch, comprising:

[0007] power amplifier and switch modules;

[0008] The power amplifier includes N transistors with an amplifying function, wherein the first ends of the N transistors are connected to a first power supply and serve as the output end of the power amplifier, the second ends of the N transistors are grounded, and the control ends of the N transistors are connected to a second power supply, and the control end of the first transistor serves as the transmitting input end;

[0009] The switch module includes a first switch circuit and a second switch circuit, wherein the first switch circuit reuses M transistors in the power amplifier close to the output terminal of the power amplifier as a first isolation circuit, and the first switch circuit further includes a first control switch connected to the first terminal of the last transistor, N>M≥1, and N and M are both integers;

[0010] The second switch circuit includes a second control switch and a second isolation circuit, one end of the second control switch is connected to the first control switch and serves as the common end of the switch module, the other end of the second control switch is connected to one end of the second isolation circuit, and the other end of the second isolation circuit serves as the receiving output end;

[0011] The transistor is configured to be turned on or off according to a difference between the first power source and the second power source;

[0012] The first control switch and the second control switch are used to be turned on or off according to input signals from their control terminals.

[0013] Optionally, the power amplifier includes at least two stages of power amplifier submodules connected in series, each of the power amplifier submodules includes n transistors, and the number of transistors in all the power amplifier submodules is N;

[0014] The first switch circuit reuses M transistors in the last stage of the power amplifier submodule in the power amplifier close to the output end of the power amplifier as a first isolation circuit, N>M≥1, and n is an integer.

[0015] Optionally, when the first isolation circuit includes two transistors, the second isolation circuit includes two transistors and a first microstrip connection line;

[0016] The first end of the first transistor in the second isolation circuit is connected to the second end of the second control switch and the first end of the first microstrip connection line respectively; the second end of the first microstrip connection line is connected to the first end of the second transistor in the second isolation circuit and serves as the receiving output end; the second end of the first transistor and the second end of the second transistor are both grounded;

[0017] The first transistor and the second transistor are turned on or off according to input signals from their control terminals.

[0018] Optionally, the gate of the transistor is the control terminal of the transistor, the source of the transistor is the first terminal of the transistor, the source is connected to the first power supply, the drain of the transistor is the second terminal of the transistor, and the drain is grounded.

[0019] Optionally, the power amplifier further includes N second microstrip connecting lines;

[0020] The i-th second microstrip connection line is arranged between the first end of the i-th transistor and the first end of the i+1-th transistor, and the N-th second microstrip connection line is arranged between the first end of the N-th transistor and the first end of the first control switch, 1≤i<N.

[0021] Optionally, the power amplifier further includes N parallel branches corresponding to each of the transistors, a first end of each of the parallel branches being connected to the control end of the transistor corresponding to itself, and second ends of the N parallel branches being connected to the second power supply;

[0022] Each of the parallel branches includes a first resistor and a first capacitor, and the first resistor and the first capacitor are connected in parallel.

[0023] Optionally, the distributed power further includes N third microstrip connecting lines;

[0024] The i-th third microstrip connecting line is arranged between the second end of the i-th parallel branch and the second end of the i+1-th parallel branch, and the N-th third microstrip connecting line is arranged between the second end of the N-th parallel branch and the second power supply, 1≤i<N.

[0025] Optionally, also include:

[0026] A fourth microstrip connecting line has a first end connected to the second end of the first parallel branch and one end of the first third microstrip connecting line, and a second end serving as the transmitting input end.

[0027] In order to solve the above technical problems, the present application also provides an electronic device, which includes the power amplifier switch as described above.

[0028] The present invention provides a power amplifier switch and electronic device that, through a rational modularization and reuse strategy, effectively addresses the issues of reduced output power and power-added efficiency, as well as large size and high production costs, that plague existing power amplifier switches. In this distributed power-efficiency switch, N transistors with amplification functions are reused, allowing M transistors to function not only as power amplifier output but also as a first isolation circuit. This dual utilization improves the circuit's power-added efficiency, reduces the need for additional components, and thus reduces the overall circuit size. Furthermore, precise control of the first and second switching circuits achieves efficient isolation between the transmit input and receive output, reducing signal interference and improving system stability. By reducing components, improving isolation and power efficiency, the overall design addresses the issues of reduced power and efficiency, large size, and high cost that plague existing solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of a power amplifier switch in the prior art;

[0031] Figure 2 A schematic diagram of a power amplifier switch provided by the present utility model;

[0032] Figure 3 This is a schematic diagram of another power amplifier switch provided by the present invention. DETAILED DESCRIPTION

[0033] The core of this utility model is to provide a power amplifier switch and electronic device, which improves the power added efficiency of the circuit, reduces the introduction of additional components, and thus reduces the size of the overall circuit. In addition, through the precise control of the first and second switching circuits, efficient isolation is achieved between the transmitting input and the receiving output, reducing signal interference and improving system stability. The overall design can solve the problems of reduced power and efficiency, large size, and high cost existing in existing solutions by reducing components and improving isolation and power efficiency.

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] like Figure 2 As shown, the present invention provides a power amplifier 11 switch, including:

[0036] Power amplifier 11 and switch module 12;

[0037] The power amplifier 11 includes N transistors with an amplifying function. The first terminals of the N transistors are connected to a first power supply and serve as output terminals of the power amplifier 11. The second terminals of the N transistors are grounded. The control terminals of the N transistors are connected to a second power supply, and the control terminal of the first transistor serves as a transmitting input terminal.

[0038] The switch module 12 includes a first switch circuit and a second switch circuit. The first switch circuit multiplexes M transistors in the power amplifier 11 close to the output terminal of the power amplifier 11 as a first isolation circuit. The first switch circuit also includes a first control switch SW1. The first control switch SW1 is connected to the first terminal of the last transistor. N>M≥1, and N and M are both integers.

[0039] The second switch circuit includes a second control switch SW2 and a second isolation circuit. One end of the second control switch SW2 is connected to the first control switch SW1 and serves as a common end of the switch module 12. The other end of the second control switch SW2 is connected to one end of the second isolation circuit. The other end of the second isolation circuit serves as a receiving output end.

[0040] The transistor is configured to be turned on or off according to a difference between a first power source and a second power source;

[0041] The first control switch SW1 and the second control switch SW2 are used to be turned on or off according to input signals at their control terminals.

[0042] The power amplifier 11 switch of this utility model significantly improves overall performance and efficiency through innovative modular design and component reuse strategies. The power amplifier 11 section utilizes N transistors with amplification functions. Through rational circuit configuration, these transistors not only achieve signal amplification but also take into account isolation and power control functions. In particular, the reuse of the M transistors near the output terminal not only provides output capacity for the power amplifier but also acts as a first isolation circuit. This dual-action design significantly reduces the need for additional components, simplifies the circuit structure, effectively improves power-added efficiency, and avoids power loss issues.

[0043] In addition, the entire power amplifier switch achieves effective isolation between the transmit input and receive output by precisely controlling the first and second switching circuits. This isolation performance ensures stable signal transmission in different modes, avoids signal interference and cross-influence, and improves the stability and reliability of the overall system.

[0044] Specifically, the signal transmission process of the distributed power amplifier switch ensures efficient signal amplification and isolation through precise power supply control and switching operation. When the signal is input from the transmitting input end, the voltage of the first power supply and the second power supply is first adjusted to form an appropriate voltage difference to turn on the transistor. When the N transistors are in the on state, they power amplify the input signal to ensure that the signal energy is effectively improved. At the same time, the first control switch SW1 is in the on state, allowing the amplified signal to pass through and output, while the second control switch SW2 remains in the off state to prevent the transmitting signal from entering the receiving end, avoiding interference between signals. When the signal is input from the common end, Vd1 is turned off and set to 0V, and Vg1 remains unchanged. At this time, the transistor is still in the on state. At the same time, the first control switch SW1 is in the off state to reduce the leakage of the received signal to the transmitting end, thereby reducing the receiving insertion loss. The second control switch SW2 is turned on to output the signal input from the common end through the receiving output end.

[0045] This design significantly reduces attenuation in the signal transmission path. In traditional designs, after passing through the power amplifier 11, the signal must pass through at least one first isolation circuit and switch. However, this design reuses transistors as the first isolation circuit, so that the signal only needs to pass through the power amplifier and a first control switch SW1 to complete the output. This simplification not only reduces signal loss but also improves the overall efficiency of the system. The presence of the second control switch SW2 and the second isolation circuit further ensures that the receiving end is not affected during signal transmission, maintaining efficient signal isolation and system stability. The entire process ensures high-performance power amplification and effective isolation through optimized switch control and power supply regulation, improving the signal amplification efficiency and reliability of the system.

[0046] In a preferred embodiment, the transistor is a transistor, the gate of the transistor is the control terminal of the transistor, the source of the transistor is the first terminal of the transistor, the source is connected to the first power supply, and the drain of the transistor is the second terminal of the transistor, which is grounded. In this preferred embodiment, the transistor is a transistor as its core component. The gate of the transistor serves as the control terminal of the transistor, receiving a control signal to determine the on or off state of the transistor. The source, as the first terminal of the transistor, is connected to the first power supply and is responsible for providing the power supply voltage to the circuit. The drain of the transistor, as the second terminal of the transistor, is directly connected to ground. This structural design utilizes the three-pole terminal characteristics of the transistor. By controlling the voltage on the gate, the conduction state between the source and drain can be precisely controlled. When a sufficient control voltage is applied to the gate, the transistor enters the on state, allowing current to flow from the source to the drain, completing signal transmission and amplification. Conversely, when the control voltage is insufficient, the transistor enters the off state, preventing current from flowing. This design effectively utilizes the switching characteristics of the transistor. Through the coordinated action of the source, drain, and gate, flexible signal control and amplification in the circuit are achieved. At the same time, the drain grounding design ensures the stability of signal transmission and the reliability of the circuit, thereby providing the system with more efficient power control capabilities and reliable working conditions.

[0047] In summary, by reducing unnecessary components and increasing the reuse rate of key devices, the present invention reduces circuit size and overall production costs. Therefore, this design not only effectively addresses the drawbacks of traditional solutions, such as reduced power and efficiency, large size, and high cost, but also adapts to the application requirements of ultra-wideband and high-gain amplifiers, making it an ideal choice for high-efficiency power amplifiers.

[0048] As a preferred embodiment, the power amplifier 11 includes at least two stages of power amplifier sub-modules connected in series, each power amplifier sub-module includes n transistors, and the number of transistors in all power amplifier sub-modules is N; the first switching circuit multiplexes M transistors in the last stage power amplifier sub-module in the power amplifier 11 close to the output end of the power amplifier 11 as the first isolation circuit, N>M≥1, and n is an integer.

[0049] In this preferred embodiment, power amplifier 11 is constructed from at least two stages of power amplifier submodules connected in series. Each power amplifier submodule comprises n transistors, and the total number of transistors in all submodules is N. This multi-stage series structure of power amplifier 11 can gradually increase the power gain of the signal, thereby effectively amplifying the input signal.

[0050] In this design, the first switching circuit reuses the M transistors near the output end of the last-stage submodule of the power amplifier 11 and uses it as the first isolation circuit. Such a design can not only continue to undertake the task of signal amplification, but also provide effective isolation for the signal transmission process, avoiding reverse interference and unnecessary loss of the signal. By reusing these M transistors as an isolation circuit, the overall complexity of the circuit is reduced, while the introduction of additional components is reduced, and the overall efficiency of the power amplifier is optimized. In addition, this dual utilization strategy enables the circuit to ensure efficient amplification while ensuring effective isolation between different signal paths by precisely controlling the switching circuit, thereby improving the reliability and stability of the system.

[0051] As a preferred embodiment, when the first isolation circuit includes two transistors, the second isolation circuit includes two transistors and a first microstrip connection line; wherein the first end of the first transistor SW3 in the second isolation circuit is respectively connected to the second end of the second control switch SW2 and the first end of the first microstrip connection line, the second end of the first microstrip connection line is connected to the first end of the second transistor SW4 in the second isolation circuit and serves as a receiving output end, and the second end of the first transistor SW3 and the second end of the second transistor SW4 are both grounded;

[0052] The first transistor SW3 and the second transistor SW4 are turned on or off according to input signals from their control terminals.

[0053] In this preferred embodiment, the design of the first and second isolation circuits further enhances system performance and signal isolation. Specifically, the first isolation circuit consists of two transistors, while the second isolation circuit consists of two transistors and a first microstrip connecting line. The second terminals of the first and second transistors SW3 and SW4 are both grounded to ensure circuit stability and effective isolation. The two transistors are turned on or off based on the input signals at their respective control terminals. The key to this design is the precise control of the first and second transistors SW3 and SW4, which effectively isolates signals between transmit and receive modes.

[0054] Specifically, when the first transistor SW3 and the second transistor SW4 are turned on or off according to the input signal, they switch the signal path according to the control logic, effectively preventing the signal from undesirably affecting the receiving end or causing interference, ensuring signal integrity and stability, and enhancing overall system performance. Furthermore, the introduction of the first microstrip connecting line optimizes the signal path, reduces signal loss, and further improves system efficiency.

[0055] like Figure 2 or Figure 3As shown, the process is as follows: When the distributed power amplifier switch operates in transmit mode, Vg and Vd represent the bias voltages for normal power amplifier operation (Vg1 and Vd1, or Vg2 and Vd2), while VC1 and VC2 control the switch to shut off the receiving branch and conduct the transmitting branch (i.e., SW1 is on, SW2 is off, and SW3 and SW4 are on). At this point, the signal is input from the transmit input, amplified by power amplifier 11, and output from the common terminal of switch module 12. The die SW2, SW3, and SW4 in the receiving branch of switch module 11 jointly ensure isolation at the receiving output, while the only impact on the transmitting branch is the insertion loss of SW1. This improves the impact of traditional distributed power amplifier switches on transmit power and power-added efficiency.

[0056] When the power amplifier switches are operating in receive mode, Vd is set to 0V, and VC1 and VC2 jointly control the receive branch to conduct and the transmit branch to shut down (that is, SW1 is off, SW2 is on, and SW3 and SW4 are off). By utilizing the PFn-1 and PFn die in the distributed power amplifier, the receive branch is immune to the influence of the transmit branch, thereby achieving low insertion loss.

[0057] As a preferred embodiment, the power amplifier 11 also includes N second microstrip connecting lines; the i-th second microstrip connecting line is arranged between the first end of the i-th transistor and the first end of the i+1-th transistor, and the N-th second microstrip connecting line is arranged between the first end of the N-th transistor and the first end of the first control switch SW1, 1≤i<N.

[0058] In this preferred embodiment, the N second microstrip lines incorporated into the power amplifier 11 play an important role in circuit stability and power regulation. Specifically, this embodiment relates to the use of second microstrip lines in the power amplifier. By providing these second microstrip lines between adjacent transistors and between the last transistor and the first control switch, they enable effective signal transmission and matching. These second microstrip lines provide low-loss transmission paths, making signal conversion between different transistors more efficient, reducing signal attenuation, and improving bandwidth characteristics and the system's frequency response. Furthermore, the microstrip structure design optimizes electromagnetic compatibility, reduces crosstalk and reflections, and thus enhances the overall performance and stability of the power amplifier. This arrangement not only improves system efficiency but also strongly supports the power amplifier's performance in high-frequency applications, enabling it to adapt to more complex signal environments and dynamically changing operating conditions, ensuring output signal clarity and reliability. By precisely designing the position and layout of these microstrip lines, the power amplifier's gain characteristics and frequency range can be effectively improved, thereby enhancing the functionality and applicability of the entire system.

[0059] As a preferred embodiment, the power amplifier 11 also includes N parallel branches corresponding to each transistor, the first end of each parallel branch is connected to the control end of the transistor corresponding to itself, and the second ends of the N parallel branches are connected to the second power supply; each parallel branch includes a first resistor and a first capacitor, and the first resistor and the first capacitor are connected in parallel.

[0060] In this preferred embodiment, the parallel branch corresponding to each transistor in the power amplifier 11 includes a first resistor and a first capacitor, which are configured in parallel. The main function of the first capacitor is to reduce the effective gate capacitance, thereby increasing the cutoff frequency of the entire circuit, allowing the circuit to operate stably at higher frequencies. At the same time, the presence of the first resistor ensures the stability of the circuit and prevents self-excitation without reducing the high-frequency gain. Specifically, the first resistor avoids signal distortion and stability issues caused by excessive capacitance by limiting the charge and discharge speed of the parallel capacitor, thereby ensuring the reliable performance of the power amplifier 11 in high-frequency operation.

[0061] Overall, this combination of parallel resistors and capacitors increases the operating frequency range of the circuit and improves the stability and high-frequency performance of the circuit.

[0062] As a preferred embodiment, the distributed power supply further includes N third microstrip connecting lines;

[0063] The i-th third microstrip connecting line is arranged between the second end of the i-th parallel branch and the second end of the i+1-th parallel branch, and the N-th third microstrip connecting line is arranged between the second end of the N-th parallel branch and the second power supply, 1≤i<N.

[0064] In this preferred embodiment, a third microstrip line is introduced into the power amplifier to enhance signal transmission and power management between parallel branches. By providing a third microstrip line between the second end of each parallel branch and between the last parallel branch and the second power supply, more efficient energy distribution and signal coupling can be achieved. This configuration not only reduces crosstalk between the individual parallel branches but also effectively reduces signal transmission loss and delay, thereby improving overall system performance. In high-frequency applications, the design of the third microstrip line optimizes the signal path, ensuring signal integrity and stability during broadband operation. Furthermore, the parallel arrangement of the third microstrip line enhances power supply stability, allowing the power amplifier to maintain low voltage fluctuations during transient response and load changes.

[0065] This design effectively improves the gain characteristics of the power amplifier 11 and enhances the anti-interference capability of the system, ensuring reliable operation in complex working environments.

[0066] As a preferred embodiment, the present invention further comprises:

[0067] The fourth microstrip connecting line has a first end connected to the second end of the first parallel branch and one end of the first third microstrip connecting line, and a second end serving as a transmitting input end.

[0068] In this preferred embodiment, a fourth microstrip connection line is introduced to optimize the input signal processing and transmission efficiency of the power amplifier. By connecting the first end of the fourth microstrip connection line to the second end of the first parallel branch and one end of the first third microstrip connection line, the design achieves direct coupling of the transmit input end, thereby improving the signal transmission capability and response speed. The setting of the fourth microstrip connection line can not only effectively transmit the transmit signal, but also ensure the integrity of the signal at a lower insertion loss. In addition, this configuration helps to reduce the impedance matching problem at the transmit input end, thereby enhancing the gain characteristics of the power amplifier 11. At the same time, combined with the design of the parallel branch, the signal can obtain better stability and anti-interference ability during the transmission process, making the overall system perform better under high frequency and dynamic conditions.

[0069] To solve the above technical problems, the present application further provides an electronic device, which includes the power amplifier switch as described above. For an introduction to the electronic device, please refer to the above embodiments, and this application will not elaborate on them here.

[0070] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0071] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power amplifier switch, characterized in that: include: power amplifier and switch modules; The power amplifier includes N transistors with an amplifying function, wherein the first ends of the N transistors are connected to a first power supply and serve as the output end of the power amplifier, the second ends of the N transistors are grounded, and the control ends of the N transistors are connected to a second power supply, and the control end of the first transistor serves as the transmitting input end; The switch module includes a first switch circuit and a second switch circuit, wherein the first switch circuit reuses M transistors in the power amplifier close to the output terminal of the power amplifier as a first isolation circuit, and the first switch circuit further includes a first control switch connected to the first terminal of the last transistor, N>M≥1, and N and M are both integers; The second switch circuit includes a second control switch and a second isolation circuit, one end of the second control switch is connected to the first control switch and serves as the common end of the switch module, the other end of the second control switch is connected to one end of the second isolation circuit, and the other end of the second isolation circuit serves as the receiving output end; The transistor is configured to be turned on or off according to a difference between the first power source and the second power source; The first control switch and the second control switch are used to be turned on or off according to input signals from their control terminals.

2. The power amplifier switch according to claim 1, wherein: The power amplifier includes at least two stages of power amplifier submodules connected in series, each of the power amplifier submodules includes n transistors, and the number of transistors in all the power amplifier submodules is N; The first switch circuit reuses the last stage of the power amplifier, and M transistors in the power amplifier submodule close to the output end of the power amplifier serve as a first isolation circuit, where N>M≥1, and n is an integer.

3. The power amplifier switch according to claim 1, wherein: When the first isolation circuit includes two transistors, the second isolation circuit includes two transistors and a first microstrip connection line; The first end of the first transistor in the second isolation circuit is connected to the second end of the second control switch and the first end of the first microstrip connection line respectively; the second end of the first microstrip connection line is connected to the first end of the second transistor in the second isolation circuit and serves as the receiving output end; the second end of the first transistor and the second end of the second transistor are both grounded; The first transistor and the second transistor are turned on or off according to input signals from their control terminals.

4. The power amplifier switch according to claim 1, wherein: The gate of the transistor is the control terminal of the transistor, the source of the transistor is the first terminal of the transistor, the source is connected to the first power supply, the drain of the transistor is the second terminal of the transistor, and the drain is grounded.

5. The power amplifier switch according to claim 1, wherein: The power amplifier further includes N second microstrip connecting lines; The i-th second microstrip connection line is arranged between the first end of the i-th transistor and the first end of the i+1-th transistor, and the N-th second microstrip connection line is arranged between the first end of the N-th transistor and the first end of the first control switch, 1≤i<N.

6. The power amplifier switch according to any one of claims 1 to 5, wherein: The power amplifier further includes N parallel branches corresponding to each of the transistors, wherein a first end of each of the parallel branches is connected to the control end of the transistor corresponding to itself, and second ends of the N parallel branches are connected to the second power supply. Each of the parallel branches includes a first resistor and a first capacitor, and the first resistor and the first capacitor are connected in parallel.

7. The power amplifier switch according to claim 6, wherein: The power amplifier further includes N third microstrip connecting lines; The i-th third microstrip connecting line is arranged between the second end of the i-th parallel branch and the second end of the i+1-th parallel branch, and the N-th third microstrip connecting line is arranged between the second end of the N-th parallel branch and the second power supply, 1≤i<N.

8. The power amplifier switch according to claim 7, wherein: Also includes: A fourth microstrip connecting line has a first end connected to the second end of the first parallel branch and one end of the first third microstrip connecting line, and a second end serving as the transmitting input end.

9. An electronic device, characterized in that: The electronic device comprises the power amplifier switch according to any one of claims 1 to 8.

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