A power amplifier circuit, device, system and control method

Abstract

The application relates to a power amplifier circuit, device, system and control method. The power amplifier circuit comprises a power amplifier with a first input end, a second input end and an output end; the first input end is electrically connected with an input signal source; a shunt device has an input end, an output end and at least two power supply ends; the input end of the shunt device is electrically connected with the output end of the power amplifier, and the output end of the shunt device serves as the output end of the power amplifier circuit; a power supply device comprises at least one fixed power supply and one variable power supply, and the fixed power supply and the variable power supply are respectively and one-to-one electrically connected with the power supply ends of the shunt device; the shunt device is used for selecting at least one fixed power supply for power supply in the waveform establishment stage of the power amplifier circuit and selecting the variable power supply for power supply in the direct current steady state stage of the power amplifier circuit. In this way, by arranging the shunt device, dynamic adjustment of the fixed power supply and the variable power supply is realized, and appropriate voltage support in the waveform establishment stage and the steady state stage is ensured.

Description

Technical Field

[0001] This application relates to the field of power amplifier technology, and in particular to a power amplifier circuit, device, system and control method. Background Technology

[0002] In automated test equipment (ATE), the power amplifier circuit (hereinafter referred to as "power amplifier") is one of the key components. Under certain operating conditions, especially when the power amplifier outputs low voltage and high current, its efficiency will decrease significantly. For example... Figure 1 As shown, when the power amplifier output current flows from the power supply Vs to the output Vo, the power consumed by the power amplifier output stage is (Vs-Vo)*Iout. If the output voltage Vo is low, the voltage difference between the power supply voltage Vs and the output voltage Vo is large. At the same time, when the output current is large, the power amplifier output stage will consume a lot of power, resulting in a decrease in efficiency.

[0003] Currently, the industry has tried various methods to improve power amplifier efficiency, but limitations still exist.

[0004] Method 1: Use a switching amplifier

[0005] For example, Class D amplifiers, although highly efficient, are not suitable for certain applications due to drawbacks such as high switching noise and slow output response.

[0006] Method 2: Use a variable power rail power amplifier output stage

[0007] like Figure 2 As shown, this scheme switches the power rails VPH and VPL of the power amplifier output stage via a switch based on the output voltage. While this method reduces the power consumption of the power amplifier output stage to some extent, the degree of reduction is related to the selection of the power rail VPL voltage and the output voltage Vo, thus it cannot always maintain high efficiency. Furthermore, rapid changes in the power supply voltage Vs can also cause unwanted jitter in the power amplifier output voltage.

[0008] Method 3: Preset power supply voltage

[0009] Based on the estimated output voltage, the power supply voltage is preset to ensure that the power consumed by the power amplifier output stage (Vs-Vo)*Iout is always small. For example, the output signal of a DAC can be used to control the output of a DC / DC switching power supply to provide power to the power amplifier output stage. Figure 3 As shown. However, this method is not suitable for some applications, such as when the power amplifier is configured as a constant current source but the load resistance is unknown.

[0010] Method 4: Control the power output through the power amplifier output.

[0011] like Figure 4As shown, this method controls the output of the power amplifier's output stage by controlling the power amplifier's output output, thus minimizing the power consumption of the output stage. Even when the output voltage is unpredictable, it maintains high efficiency in the power amplifier's output stage. However, this method requires the power supply's output voltage to change faster than the power amplifier's output voltage. Currently, most power supplies change their output voltage slower than the power amplifier; for example, the output voltage of a DC / DC switching power supply changes slower than that of the power amplifier. This affects the build-up waveform and speed during the power amplifier's build-up process. Figure 5 As shown.

[0012] In addition to the methods mentioned above, CN 106603016 B patent proposes a method to improve the efficiency of a linear power amplifier. This method uses an adjustable power supply to power the amplifier and adjusts the power supply according to the amplifier's output voltage. Although this method improves the amplifier's efficiency to some extent, it still suffers from the problem that the adjustable power supply rate cannot quickly keep up with the amplifier's output signal rate.

[0013] Therefore, in this context, existing technologies still face many challenges in improving power amplifier efficiency, and how to maintain the high efficiency of the power amplifier output stage has become an urgent problem to be solved. Summary of the Invention

[0014] In view of the above problems of the prior art, this application provides a power amplifier circuit, device, system and control method, which selects to use at least one fixed power supply during the waveform establishment stage of the power amplifier circuit output, and selects to use a variable power supply during the DC steady state stage of the power amplifier circuit output. Therefore, it ensures the fast response of the power amplifier circuit during the waveform establishment stage and achieves high-efficiency operation during the DC steady state stage.

[0015] To achieve the above objectives, the first aspect of this application provides a power amplifier circuit, comprising:

[0016] A power amplifier has a first input terminal, a second input terminal, and an output terminal; the first input terminal is electrically connected to an input signal source.

[0017] A shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the shunt serves as the output terminal of the power amplifier circuit.

[0018] A power supply device includes at least one fixed power supply and one variable power supply, wherein the fixed power supply and the variable power supply are electrically connected to the power terminals of the shunt in a one-to-one correspondence; wherein the output voltage of the variable power supply changes with the output voltage of the shunt, and the rate of change is slower than the maximum rate of change of the output voltage of the shunt; and when the power amplifier circuit is in a DC steady-state phase, when the power amplifier circuit outputs current, the output voltage of the variable power supply is higher than the output voltage of the shunt; when the power amplifier circuit absorbs current, the output voltage of the variable power supply is lower than the output voltage of the shunt.

[0019] The shunt is used to select the use of at least one fixed power supply during the waveform establishment phase of the power amplifier circuit output, and to select the use of the variable power supply during the DC steady state phase of the power amplifier circuit output.

[0020] Thus, this application achieves dynamic adjustment between a fixed power supply and a variable power supply through the configured shunt, enabling the power amplifier circuit to select the appropriate power supply at different stages. Specifically, during the waveform establishment stage, a fixed power supply is used to ensure the rapid establishment and stabilization of the power amplifier circuit's output waveform; while during the DC steady-state stage, the power supply is switched to a variable power supply. Although its voltage change rate is slower, its output voltage is higher than the shunt output voltage in steady state, thus maintaining high-efficiency operation.

[0021] As one possible implementation of the first aspect, the shunt is a positive shunt, and the output voltage of at least one of the fixed power supplies is higher than the maximum output voltage of the shunt and higher than the output voltage of the variable power supply when the power amplifier circuit output is in the DC steady state stage.

[0022] And / or, the shunt is a negative shunt, and the output voltage of at least one of the fixed power supplies is lower than the minimum output voltage of the shunt and lower than the output voltage of the variable power supply when the power amplifier circuit output is in the DC steady state phase.

[0023] Thus, during the waveform establishment phase of the power amplifier circuit, selecting a suitable fixed power supply can quickly provide sufficient energy to the power amplifier circuit, ensuring the rapid establishment and stabilization of the output waveform.

[0024] As one possible implementation of the first aspect, when the at least one fixed power source includes two or more fixed power sources, the output voltage of each fixed power source is different.

[0025] The shunt is used to select at least one fixed power supply for power supply during the power amplifier circuit output waveform establishment phase, including: the shunt is used to select, in real time or periodically, a fixed power supply with a voltage value lower than the current output voltage of the shunt and the smallest output voltage value, and / or select, in real time or periodically, a fixed power supply with a voltage value lower than the current output voltage of the shunt and the largest output voltage value, as the currently selected fixed power supply.

[0026] Thus, during the power amplifier circuit's output waveform establishment phase, the shunt can select, in real-time or periodically, a fixed power supply with the lowest output voltage value that is higher than its current output voltage, and / or, in real-time or periodically, a fixed power supply with the highest output voltage value that is lower than the shunt's current output voltage. This selection strategy ensures that the power amplifier circuit receives sufficient voltage to quickly establish a stable output waveform, while avoiding increased energy consumption and circuit stress that might result from using excessively high voltages.

[0027] As one possible implementation of the first aspect, the variable power supply's output voltage changing in response to changes in the shunt's output voltage includes:

[0028] The output voltage of the variable power supply changes linearly following the output voltage of the shunt.

[0029] In this way, linear variation can ensure that the output voltage of the variable power supply and the output voltage of the shunt maintain a consistent proportional relationship. When the output voltage of the shunt changes, the variable power supply can quickly adjust its output voltage to adapt to the change in the output voltage of the shunt in real time, ensuring that the variable power supply can provide stable voltage support under different operating conditions.

[0030] As one possible implementation of the first aspect, the variable power supply includes a bidirectional variable power supply, comprising: an input first port, an input second port, an output first port, and an output second port; wherein:

[0031] When current flows out from the first input port and into the second input port, and the potential of the first input port is higher than that of the second input port, the variable power supply is in a power supply state.

[0032] When current flows from the first input port and flows out from the second input port, and the potential of the first input port is higher than that of the second input port, the variable power supply is in a power absorption state.

[0033] When current flows out from the first output port and into the second output port, and the potential of the first output port is higher than that of the second output port, the variable power supply is in a power supply state.

[0034] When current flows from the first output port and flows out from the second output port, and the potential of the first output port is higher than that of the second output port, the variable power supply is in a power absorption state.

[0035] Thus, the variable power supply has a bidirectional power transmission function, which can transfer power from the input end to the output end, and also transfer power from the output end back to the input end. In other words, the variable power supply can both provide power and absorb power, thereby reducing energy waste.

[0036] As one possible implementation of the first aspect, the splitter includes one of the following:

[0037] When a positive shunt is included: the positive shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the positive shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the positive shunt serves as the output terminal of the power amplifier circuit; the fixed power supply and the variable power supply are respectively electrically connected to the power supply terminals of the positive shunt in a one-to-one correspondence.

[0038] When a negative shunt is included: the negative shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the negative shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the negative shunt serves as the output terminal of the power amplifier circuit; the fixed power supply and the variable power supply are respectively electrically connected to the power supply terminals of the negative shunt in a one-to-one correspondence.

[0039] When a combined shunt consisting of a positive shunt and a negative shunt is used: the combined shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminals of the positive shunt and the negative shunt are the input terminals of the combined shunt, which are electrically connected to the output terminal of the power amplifier; the output terminals of the positive shunt and the negative shunt are the output terminals of the combined shunt, and also serve as the output terminals of the power amplifier circuit; the fixed power supply and the variable power supply are electrically connected to the power supply terminals of the combined shunt in a one-to-one correspondence.

[0040] Thus, the design of the aforementioned shunt allows the power amplifier circuit to select different shunt types (positive shunt, negative shunt, or combined shunt) and adjust the number and connection method of the power supply terminals according to actual application requirements, meeting the needs of different scenarios and improving design flexibility.

[0041] As one possible implementation of the first aspect, when the shunt includes a combined shunt consisting of a positive shunt and a negative shunt, at the same time, either the positive shunt or the negative shunt is operating; the power supply device further includes:

[0042] A current detection device is electrically connected to the output terminal of the power amplifier circuit to detect the direction of the output current of the power amplifier circuit and select whether the positive shunt or the negative shunt is working based on it.

[0043] A voltage detection device is electrically connected to the output terminal of the power amplifier circuit to detect the output voltage of the power amplifier circuit and adjust the output voltage of the variable power supply accordingly.

[0044] When the current detection device detects that the power amplifier circuit is outputting current, the positive shunt operates. The voltage detection device adjusts the output voltage of the variable power supply according to the detected output voltage of the power amplifier circuit, so that the difference between the output voltage of the variable power supply and the output voltage of the power amplifier circuit is positive.

[0045] When the current detection device detects that the power amplifier circuit is absorbing current, the negative shunt operates. The voltage detection device adjusts the output voltage of the variable power supply according to the detected output voltage of the power amplifier circuit, so that the difference between the output voltage of the variable power supply and the output voltage of the power amplifier circuit is negative.

[0046] In this way, the current detection device can detect the direction of the output current of the power amplifier circuit in real time, and automatically select the positive shunt or the negative shunt to operate based on the current direction. Furthermore, the voltage detection device can monitor the output voltage of the power amplifier circuit in real time and adjust the output voltage of the variable power supply as needed. By maintaining an appropriate difference between the output voltage and the power amplifier circuit's output voltage, voltage regulation can be optimized, reducing heat dissipation and energy waste.

[0047] As one possible implementation of the first aspect, the shunt includes: a bias voltage Vbias5, a bias voltage Vbias6, a field-effect transistor M5, a field-effect transistor M6, and a diode D5;

[0048] The bias voltage Vbias5 is electrically connected to the gate of the field-effect transistor M5, the drain of the field-effect transistor M5 is electrically connected to the cathode of the diode D5, and the anode of the diode D5 is electrically connected to the variable power supply.

[0049] The bias voltage Vbias6 is electrically connected to the gate of the field-effect transistor M6, the drain of the field-effect transistor M6 is electrically connected to the fixed power supply, and the source of the field-effect transistor M6 is electrically connected to the source of the field-effect transistor M5.

[0050] Thus, by using field-effect transistors and diodes, along with a simple bias voltage configuration, the design of the entire power amplifier circuit becomes simpler and clearer, which not only reduces the complexity of the power amplifier circuit but also improves its maintainability.

[0051] To achieve the above objectives, a second aspect of this application provides a power amplifier device, comprising: a system power supply, at least a first power amplifier circuit and a second power amplifier circuit, wherein the first power amplifier circuit and the second power amplifier circuit are the power amplifier circuits described in the first aspect above;

[0052] The input first port and input second port of the variable power supply in the first power amplifier circuit and the variable power supply in the second power amplifier circuit are connected in parallel and connected to the output first port and output second port of the system power supply.

[0053] To achieve the above objectives, a third aspect of this application provides a power amplifier system, comprising at least a first power amplifier device and a second power amplifier device;

[0054] The first power amplifier device includes the power amplifier circuit and the first system power supply described in the first aspect above, wherein the power amplifier circuit includes a variable power supply with an input first port and an input second port that are electrically connected to the output first port and the output second port of the first system power supply, respectively.

[0055] The second power amplifier device includes the power amplifier circuit and the second system power supply described in the first aspect above, wherein the power amplifier circuit includes a variable power supply with an input first port and an input second port that are electrically connected to the output first port and the output second port of the second system power supply, respectively.

[0056] The first input port and the second input port of the first system power supply are electrically connected to the first input port and the second input port of the second system power supply, respectively.

[0057] To achieve the above objectives, a fourth aspect of this application provides a power amplifier control method applied to the power amplifier circuit described in the first aspect, the method comprising:

[0058] During the power amplifier circuit output waveform establishment stage, at least one fixed power supply is selected through a shunt to power the circuit.

[0059] When the output of the power amplifier circuit reaches the DC steady state, a variable power supply is selected through a shunt to power the circuit. Attached Figure Description

[0060] Figure 1 This is a schematic diagram illustrating the efficiency problem of the conventional power amplifier circuit provided in this application;

[0061] Figure 2 This is a schematic diagram of the power amplifier output stage using power rail switching provided in this application;

[0062] Figure 3 This is a schematic diagram of the power supply voltage preset based on the estimated output voltage provided in this application;

[0063] Figure 4 This is a schematic diagram provided in this application of directly controlling the power output of the power amplifier output stage through the power amplifier output;

[0064] Figure 5 This is a schematic diagram of the power amplifier output waveform establishment process provided in this application;

[0065] Figure 6 This is one of the structural schematic diagrams of a power amplifier circuit provided in this application;

[0066] Figure 7 This application provides a structural schematic diagram of a positive shunt applied in an open-loop system;

[0067] Figure 8 This is a structural schematic diagram of a positive shunt applied in a closed-loop system according to an embodiment of this application;

[0068] Figure 9 This is a structural schematic diagram of a closed-loop system that simultaneously applies positive and negative shunts, as provided in this application.

[0069] Figure 10 This is a schematic diagram of the structure of a variable power source provided in this application;

[0070] Figure 11 This is a structural schematic diagram of an adjustable fixed power supply provided in this application;

[0071] Figure 12 This is a schematic diagram of a variable power supply port provided in this application;

[0072] Figure 13 This is a structural schematic diagram of a positive and negative shunt provided in this application, driven by a variable power supply and a fixed power supply;

[0073] Figure 14 This is a structural schematic diagram of a positive and negative shunt driven by a variable power supply, as provided in this application;

[0074] Figure 15 This is a structural schematic diagram of a power amplifier device provided in this application;

[0075] Figure 16 This is a structural schematic diagram of a power amplifier system provided in this application;

[0076] Figure 17 This is a waveform diagram of the rising phase of the positive shunt output according to Embodiment 1 of this application;

[0077] Figure 18 This is a waveform diagram of the falling phase of the positive shunt output of Embodiment 1 provided in this application;

[0078] Figure 19This is a waveform diagram of the rising phase of the positive shunt output of Embodiment 2 provided in this application;

[0079] Figure 20 This is a structural schematic diagram of a negative shunt applied in an open-loop system, as provided in this application;

[0080] Figure 21 This is a structural schematic diagram of a negative shunt applied in a closed-loop system, as provided in this application;

[0081] Figure 22 This is a waveform diagram of the output descent phase of the negative shunt provided in Embodiment 3 of this application;

[0082] Figure 23 This is a structural schematic diagram of an embodiment of the positive shunt provided in this application;

[0083] Figure 24 This is a structural schematic diagram of Embodiment 2, which uses both positive and negative shunts provided in this application.

[0084] Figure 25 This is a structural schematic diagram of Embodiment 3 of the positive shunt provided in this application;

[0085] Figure 26 This is a structural schematic diagram of Embodiment 4 of the positive shunt provided in this application;

[0086] Figure 27 This is a structural schematic diagram of Embodiment 5 of the negative shunt provided in this application;

[0087] Figure 28 This is the second structural schematic diagram of a power amplifier circuit provided in this application.

[0088] It should be understood that the dimensions and shapes of the blocks in the above structural diagrams are for reference only and should not constitute an exclusive interpretation of the embodiments of the present invention. The relative positions and inclusion relationships between the blocks presented in the structural diagrams are only schematic representations of the structural relationships between the blocks, and are not intended to limit the physical connection methods of the embodiments of the present invention. Detailed Implementation

[0089] The technical solutions provided in this application will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the system architecture and business scenarios provided in the embodiments of this application are mainly for illustrating possible implementations of the technical solutions of this application and should not be construed as the sole limitation on the technical solutions of this application. Those skilled in the art will recognize that the technical solutions provided in this application are equally applicable to similar technical problems as system architectures evolve and new business scenarios emerge.

[0090] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0091] This application provides a power amplifier circuit, such as... Figure 6 As shown, it includes: a power amplifier having a first input terminal, a second input terminal, and an output terminal; the first input terminal is electrically connected to an input signal source;

[0092] A shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the shunt serves as the output terminal of the power amplifier circuit.

[0093] A power supply device includes at least one fixed power supply and one variable power supply, wherein the fixed power supply and the variable power supply are electrically connected to the power terminals of the shunt in a one-to-one correspondence; wherein the output voltage of the variable power supply changes with the output voltage of the shunt, and the rate of change is slower than the maximum rate of change of the output voltage of the shunt; and when the power amplifier circuit is in a DC steady-state phase, when the power amplifier circuit outputs current, the output voltage of the variable power supply is higher than the output voltage of the shunt; when the power amplifier circuit absorbs current, the output voltage of the variable power supply is lower than the output voltage of the shunt.

[0094] The shunt is used to select the use of at least one fixed power supply during the waveform establishment phase of the power amplifier circuit output, and to select the use of the variable power supply during the DC steady state phase of the power amplifier circuit output.

[0095] Generally, the rate of change of the variable power supply's output voltage is slower than the maximum rate of change of the shunt's output voltage, which mainly depends on the speed of the power amplifier's input signal. It is worth noting that in this application, the shunt's output voltage and the power amplifier's output voltage are the same voltage. That is, the variable power supply's output voltage changes in accordance with the power amplifier's output voltage, but the rate of change is slower than the maximum rate of change of that power amplifier's output voltage.

[0096] Thus, this application achieves dynamic adjustment between a fixed power supply and a variable power supply through the configured shunt, enabling the power amplifier circuit to select the appropriate power supply at different stages. Specifically, during the waveform establishment stage, a fixed power supply is used to ensure the rapid establishment and stabilization of the power amplifier circuit's output waveform; while during the DC steady-state stage, the power supply is switched to a variable power supply. Although its voltage change rate is slower, its output voltage is higher than the shunt output voltage in steady state, thus maintaining high-efficiency operation.

[0097] For a shunt, the output (Out) is a function of the input (In), and this function is... Figure 7 The gate-source voltage (gs voltage) and output current of the MOSFET are functions of the MOSFET's gate-source voltage (gs voltage) and output current.

[0098] Furthermore, shunts (taking positive shunts as an example) can be applied in different systems:

[0099] For example, such as Figure 7 As shown, a positive shunt is applied in an open-loop system.

[0100] For example, such as Figure 8 As shown, the positive shunt is used in the closed-loop system. Unlike the open-loop system, the output of the positive shunt is used as the output of the power amplifier circuit and is electrically connected to the second input of the power amplifier to form a feedback loop.

[0101] For example, such as Figure 20 As shown, a negative shunt is applied in an open-loop system.

[0102] For example, such as Figure 21 As shown, the negative shunt is used in a closed-loop system. Unlike the open-loop system, the output of the negative shunt is used as the output of the power amplifier circuit and is electrically connected to the second input of the power amplifier to form a feedback loop.

[0103] For example, such as Figure 9 As shown, both positive and negative shunts are used in the closed-loop system.

[0104] It's important to note that positive and negative shunts are physically identical; the main difference lies in the direction of the current they handle and the resulting voltage polarity. Specifically, in a positive shunt, because the current flows from the power source to the output, the voltage difference across the shunt is positive (i.e., the positive terminal of the voltage is at the input of the shunt); while in a negative shunt, because the current flows from the output to the power source, the voltage difference across the shunt is negative (i.e., the positive terminal of the voltage is at the output of the shunt).

[0105] In some embodiments, the stationary power supply is a DC / DC switching power supply.

[0106] In some embodiments, one implementation of a variable power supply is based on a DC / DC switching power supply. Specifically, the input or output control signal of the shunt after voltage conversion is connected to the Vref voltage reference terminal of the DC / DC switching power supply to regulate the output voltage. However, it is worth noting that some DC / DC switching power supplies do not have a Vref control interface. For this situation, there is another implementation of the variable power supply: such as... Figure 10 As shown, resistor R3 is introduced, with one end connected to the FB feedback voltage port of the DC / DC switching power supply, and the other end connected to the input or output control signal (called Vctrl signal) of the shunt after voltage transformation. Under normal operating conditions, the FB feedback voltage port maintains a constant voltage Vref, which generates a stable current across resistor R1. When Vctrl is higher than Vref, the power feedback system lowers the output voltage Vout to ensure the current across R1 remains constant; conversely, when Vctrl is lower than Vref, the power feedback system raises the output voltage Vout, again to maintain a stable current across R1.

[0107] It should be noted that when adjusting the output voltage of a fixed power supply, two implementation methods are available. The first method uses a multi-output DC / DC switching power supply to generate different output voltages, and connects these output voltages to the fixed power supply voltage input of a shunt via a multiplexer switch. Figure 11 As shown. The second embodiment utilizes, as Figure 10 The variable power supply shown uses a digital-to-analog converter (DAC) to control either the Vref voltage reference terminal or the Vctrl voltage terminal, thereby enabling flexible adjustment of the fixed power supply output voltage.

[0108] In some embodiments, the shunt is a positive shunt, wherein the output voltage of at least one of the fixed power supplies is higher than the maximum output voltage of the shunt and higher than the output voltage of the variable power supply when the power amplifier circuit output is in the DC steady state stage; and / or, the shunt is a negative shunt, wherein the output voltage of at least one of the fixed power supplies is lower than the minimum output voltage of the shunt and lower than the output voltage of the variable power supply when the power amplifier circuit output is in the DC steady state stage.

[0109] The output voltage of the fixed power supply can be adjusted according to the maximum output voltage of the shunt. After adjustment, the output voltage of the fixed power supply does not change with the output voltage of the shunt. Therefore, adjusting the output voltage of the fixed power supply can further improve the efficiency of the shunt. Here, adjustment refers to selecting different fixed power supplies for different output voltages. If the shunt is a positive shunt, at least one fixed power supply with an output voltage higher than the maximum output voltage of the shunt and higher than the output voltage of the variable power supply when the power amplifier circuit is in the DC steady-state stage is used for power supply. If the shunt is a negative shunt, at least one fixed power supply with an output voltage lower than the minimum output voltage of the shunt and lower than the output voltage of the variable power supply when the power amplifier circuit is in the DC steady-state stage is used for power supply. The specific selection method can be seen in the following embodiments, which will not be described in detail here.

[0110] Thus, during the power amplifier circuit's output waveform establishment phase, a fixed power supply with a high output voltage can quickly provide sufficient energy to the power amplifier circuit, ensuring the rapid establishment and stabilization of the output waveform.

[0111] In some embodiments, when the at least one fixed power source includes two or more fixed power sources, the output voltage of each fixed power source is different.

[0112] The shunt is used to select at least one fixed power supply for power supply during the power amplifier circuit output waveform establishment phase, including: the shunt is used to select, in real time or periodically, a fixed power supply with a voltage value lower than the current output voltage of the shunt and the smallest output voltage value, and / or select, in real time or periodically, a fixed power supply with a voltage value lower than the current output voltage of the shunt and the largest output voltage value, as the currently selected fixed power supply.

[0113] For example, a power amplifier circuit includes a shunt and two fixed power supplies, wherein the first fixed power supply outputs 15V and the second fixed power supply outputs 10V.

[0114] Assuming the power amplifier circuit has just started working, the current output voltage of the shunt is 5V. The shunt checks the current output voltage of 5V in real time or periodically. The shunt selects the fixed power supply with the lowest output voltage value that is higher than the current output voltage of 5V. The output voltage of the second fixed power supply is 10V, which meets the selection criteria. Therefore, the shunt selects the second fixed power supply as the fixed power supply to be used, providing 10V voltage support to the load.

[0115] Assuming that during the waveform setup phase, the output voltage of the shunt gradually rises to 12V, the shunt checks the current output voltage of 12V in real time or periodically. The shunt selects the fixed power supply with the lowest output voltage value that is higher than the current output voltage of 12V. The output voltage of the first fixed power supply is 15V, which meets the selection criteria. Therefore, the shunt selects the first fixed power supply as the fixed power supply currently in use to provide 15V voltage support to the load.

[0116] It should be noted that when the shunt is a negative shunt, the fixed power supply with the largest output voltage value lower than the current output voltage of the shunt is selected as the fixed power supply for the current stage. For example, if the first fixed power supply output voltage is -10V and the second fixed power supply output voltage is -8V, when the shunt output voltage is -5V, in order to avoid wasting resources and improve the power amplifier efficiency, the second fixed power supply is preferred as the fixed power supply for the shunt.

[0117] Thus, during the power amplifier circuit's output waveform establishment phase, the shunt can select a suitable fixed power supply as the current power source in real time or periodically. This selection strategy ensures that the power amplifier circuit receives sufficient voltage to quickly establish a stable output waveform, while avoiding increased energy consumption and circuit stress that may result from using excessively high voltage.

[0118] In some embodiments, the output voltage of the variable power supply varies in response to changes in the output voltage of the shunt, including:

[0119] The output voltage of the variable power supply changes linearly following the output voltage of the shunt.

[0120] There is a difference between the voltage of the variable power supply and the output voltage of the shunt. For a positive shunt, this difference is positive; for a negative shunt, it is negative. The smaller this difference, the higher the efficiency of the shunt under steady-state DC conditions.

[0121] It is worth noting that the reason for setting the output voltage of the variable power supply to change linearly with the output voltage of the shunt is that:

[0122] (1) Linear change ensures that the output voltage of the variable power supply and the output voltage of the shunt maintain a consistent proportional relationship, avoids voltage fluctuations caused by nonlinear changes, and improves the stability of the power amplifier circuit.

[0123] (2) Linear changes can be described and controlled by simple mathematical models, making the design and implementation of power amplifier circuits simpler and more reliable.

[0124] (3) Linear change can quickly respond to changes in the output voltage of the shunt, so that the variable power supply can quickly adjust the output voltage and improve the response speed.

[0125] In this way, linear variation can ensure that the output voltage of the variable power supply and the output voltage of the shunt maintain a consistent proportional relationship. When the output voltage of the shunt changes, the variable power supply can quickly adjust its output voltage to adapt to the change in the output voltage of the shunt in real time, ensuring that the variable power supply can provide stable voltage support under different operating conditions.

[0126] In some embodiments, such as Figure 12 As shown, the variable power supply includes a bidirectional variable power supply, comprising: an input first port, an input second port, an output first port, and an output second port; wherein:

[0127] When current flows out from the first input port and into the second input port, and the potential of the first input port is higher than that of the second input port, the variable power supply is in a power supply state.

[0128] When current flows from the first input port and flows out from the second input port, and the potential of the first input port is higher than that of the second input port, the variable power supply is in a power absorption state.

[0129] When current flows out from the first output port and into the second output port, and the potential of the first output port is higher than that of the second output port, the variable power supply is in a power supply state.

[0130] When current flows from the first output port and flows out from the second output port, and the potential of the first output port is higher than that of the second output port, the variable power supply is in a power absorption state.

[0131] Specifically, a variable power supply transforms the input and output voltages by transferring power, with almost no power loss during the transformation process. When power flows from the input to the output, the input current flows in from the first input port and out from the second input port, with the potential at the first input port being higher than that at the second input port; the output current flows out from the first output port and in from the second output port, with the voltage at the first output port being higher than that at the second output port. When power flows from the input to the output, the principle is similar, and the repetitions will not be repeated.

[0132] Thus, the variable power supply has a bidirectional power transmission function, which can transfer power from the input end to the output end, and also transfer power from the output end back to the input end. In other words, the variable power supply can both provide power and absorb power, thereby reducing energy waste.

[0133] For example, let's take the positive voltage output of a positive shunt as an example.

[0134] Connection method: The first output port of the variable power supply is connected to the power supply terminal of the positive shunt, and the second output port of the variable power supply is grounded.

[0135] The working principle is as follows:

[0136] Output voltage: The first output port of the variable power supply outputs a positive voltage that is slightly higher than the output voltage of the positive shunt. For example, if the output voltage of the positive shunt is 10V, the first output port of the variable power supply may output 10.5V.

[0137] Current direction: The current flows out from the first output port and flows in from the second output port, that is, the current flows from the high potential to the low potential.

[0138] Potential relationship: The potential of the first output port is higher than that of the second output port, ensuring that the current flows from the high potential to the low potential.

[0139] Power transfer direction: At this time, the power of the variable power supply flows from the input terminal to the output terminal, providing the required voltage and current support.

[0140] For example, let's take the case of a positive shunt outputting a negative voltage as an example.

[0141] Connection method: The first output port of the variable power supply is connected to the power supply terminal of the positive shunt, and the second output port of the variable power supply is grounded.

[0142] The working principle is as follows:

[0143] Output voltage: The first output port of the variable power supply outputs a negative voltage that is slightly higher than the output voltage of the positive shunt. For example, if the output voltage of the positive shunt is -10V, the first output port of the variable power supply may output -9.5V.

[0144] Current direction: The current flows out from the first output port and flows in from the second output port, that is, the current flows from the low potential to the high potential.

[0145] Potential relationship: The potential of the first output port is lower than that of the second output port, ensuring that the current flows from the low potential to the high potential.

[0146] Power transfer direction: At this time, the power of the variable power supply flows from the output to the input, which can be used for energy recovery or inverter operation.

[0147] In some embodiments, the power supply device further includes:

[0148] An energy storage device, electrically connected to the input terminal of the power supply device, is used to store electrical energy;

[0149] An energy release device, electrically connected to the input terminal of the power supply device, is used to release electrical energy;

[0150] The energy storage device includes a capacitor;

[0151] The energy release device includes a capacitor and a Zener diode connected in parallel with the capacitor.

[0152] For energy release devices, when the capacitor voltage exceeds the threshold, the Zener diode turns on, releasing the energy in the capacitor in the form of heat.

[0153] In some embodiments, the shunt includes one of the following:

[0154] When a positive shunt is included: the positive shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the positive shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the positive shunt serves as the output terminal of the power amplifier circuit; the fixed power supply and the variable power supply are respectively electrically connected to the power supply terminals of the positive shunt in a one-to-one correspondence.

[0155] When a negative shunt is included: the negative shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the negative shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the negative shunt serves as the output terminal of the power amplifier circuit; the fixed power supply and the variable power supply are respectively electrically connected to the power supply terminals of the negative shunt in a one-to-one correspondence.

[0156] When a combined shunt consisting of a positive shunt and a negative shunt is used: the combined shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminals of the positive shunt and the negative shunt are the input terminals of the combined shunt, which are electrically connected to the output terminal of the power amplifier; the output terminals of the positive shunt and the negative shunt are the output terminals of the combined shunt, and also serve as the output terminals of the power amplifier circuit; the fixed power supply and the variable power supply are electrically connected to the power supply terminals of the combined shunt in a one-to-one correspondence.

[0157] Thus, the design of the aforementioned shunt allows the power amplifier circuit to select different shunt types (positive shunt, negative shunt, or combined shunt) and adjust the number and connection method of the power supply terminals according to actual application requirements, meeting the needs of different scenarios and improving design flexibility.

[0158] It is worth noting that when both the positive and negative shunts are needed, each requires a variable power supply. However, compared to a fixed power supply, the circuitry of a variable power supply is more complex and more expensive. Therefore, as... Figure 13As shown, a scheme using one variable power supply and one fixed power supply can replace two variable power supplies. Specifically, the output of one variable power supply is connected to the power supply terminal of the positive shunt, while the high-potential output terminal of the fixed power supply is connected to the power supply terminal of the positive shunt, and the low-potential output terminal is connected to the power supply terminal of the negative shunt. This allows the positive and negative shunts to be driven by the same variable power supply with a certain voltage difference. This scheme not only simplifies circuit design and reduces costs, but also effectively improves the overall system efficiency.

[0159] In some embodiments, when the shunt includes a combined shunt consisting of a positive shunt and a negative shunt, at the same time, either the positive shunt or the negative shunt is operating; the power supply device further includes:

[0160] A current detection device is electrically connected to the output terminal of the power amplifier circuit to detect the direction of the output current of the power amplifier circuit and select whether the positive shunt or the negative shunt is working based on it.

[0161] A voltage detection device is electrically connected to the output terminal of the power amplifier circuit to detect the output voltage of the power amplifier circuit and adjust the output voltage of the variable power supply accordingly.

[0162] When the current detection device detects that the power amplifier circuit is outputting current, the positive shunt operates. The voltage detection device adjusts the output voltage of the variable power supply according to the detected output voltage of the power amplifier circuit, so that the difference between the output voltage of the variable power supply and the output voltage of the power amplifier circuit is positive.

[0163] When the current detection device detects that the power amplifier circuit is absorbing current, the negative shunt operates. The voltage detection device adjusts the output voltage of the variable power supply according to the detected output voltage of the power amplifier circuit, so that the difference between the output voltage of the variable power supply and the output voltage of the power amplifier circuit is negative.

[0164] It's important to note that power amplifier circuits can only output or sink current. When a power amplifier circuit uses both positive and negative shunts simultaneously, only one shunt can be active at any given time. For example... Figure 14 As shown, the power supply terminals of the positive and negative shunts can be connected to the same variable power source simultaneously, resulting in zero voltage difference. This reduces circuit complexity and cost. When the current detection device detects that the power amplifier circuit is outputting current, the positive shunt operates, and the difference between the output voltage of the variable power source and the output voltage of the power amplifier circuit is positive. When the current detection device detects that the power amplifier circuit is absorbing current, the negative shunt operates, and the difference between the output voltage of the variable power source and the output voltage of the power amplifier circuit is negative.

[0165] For example, the current detection device may include a resistor connected in series at the output terminal of the power amplifier circuit; a comparator is used to detect the change in the polarity of the voltage across the resistor, thereby monitoring the direction of the output current of the power amplifier circuit.

[0166] For example, the voltage detection device may include an operational amplifier, which is used to measure the output voltage of the power amplifier circuit.

[0167] In this way, the current detection device can detect the direction of the output current of the power amplifier circuit in real time, and automatically select the positive shunt or the negative shunt to operate based on the current direction. Furthermore, the voltage detection device can monitor the output voltage of the power amplifier circuit in real time and adjust the output voltage of the variable power supply as needed. By maintaining an appropriate difference between the output voltage and the power amplifier circuit's output voltage, voltage regulation can be optimized, reducing heat dissipation and energy waste.

[0168] This application provides a power amplifier device, such as... Figure 15 As shown, it includes: a system power supply, at least a first power amplifier circuit and a second power amplifier circuit, wherein the first power amplifier circuit and the second power amplifier circuit are the power amplifier circuits mentioned above.

[0169] The input first port and input second port of the variable power supply in the first power amplifier circuit and the variable power supply in the second power amplifier circuit are connected in parallel and connected to the output first port and output second port of the system power supply.

[0170] Specifically, the system power supply can provide power to the variable power supply in the first power amplifier circuit and the variable power supply in the second power amplifier circuit. When the variable power supply in the first power amplifier circuit absorbs power, it not only obtains power from the system power supply, but can also transfer part or all of the absorbed power to the variable power supply in the second power amplifier circuit. The variable power supply in the second power amplifier circuit provides the obtained power to the second power amplifier to ensure that the second power amplifier can work normally.

[0171] In this way, the variable power supply in the first power amplifier circuit can transfer unused or excess power to the variable power supply in the second power amplifier circuit, reducing unnecessary energy waste and improving the overall efficiency of the system.

[0172] This application provides a power amplifier system, such as... Figure 16 As shown, it includes at least a first power amplifier and a second power amplifier.

[0173] The first power amplifier device includes a power amplifier circuit and a first system power supply, wherein the power amplifier circuit includes a variable power supply with an input first port and an input second port that are electrically connected to the output first port and the output second port of the first system power supply, respectively.

[0174] The second power amplifier device includes a power amplifier circuit and a second system power supply, wherein the power amplifier circuit includes a variable power supply with an input first port and an input second port that are electrically connected to the output first port and the output second port of the second system power supply, respectively.

[0175] The first input port and the second input port of the first system power supply are electrically connected to the first input port and the second input port of the second system power supply, respectively.

[0176] Specifically, the variable power supply in the first power amplifier circuit can provide the absorbed power to the first system power supply, the first system power supply can provide the power obtained from the first power amplifier circuit to the second system power supply, and the second system power supply obtains power from the first system power supply and then provides power to the variable power supply in the second power amplifier circuit.

[0177] Thus, the bidirectional transfer characteristic of the variable power supply allows power to flow efficiently between different devices (i.e., the first power amplifier and the second power amplifier), reducing energy consumption and improving the overall efficiency of the system.

[0178] As one possible implementation of the first aspect, such as Figure 25 As shown, the shunt includes: bias voltage Vbias5, bias voltage Vbias6, field-effect transistor M5, field-effect transistor M6, and diode D5;

[0179] The bias voltage Vbias5 is electrically connected to the gate of the field-effect transistor M5, the drain of the field-effect transistor M5 is electrically connected to the cathode of the diode D5, and the anode of the diode D5 is electrically connected to the variable power supply.

[0180] The bias voltage Vbias6 is electrically connected to the gate of the field-effect transistor M6, the drain of the field-effect transistor M6 is electrically connected to the fixed power supply, and the source of the field-effect transistor M6 is electrically connected to the source of the field-effect transistor M5.

[0181] Thus, by using field-effect transistors and diodes, along with a simple bias voltage configuration, the design of the entire power amplifier circuit becomes simpler and clearer, which not only reduces the complexity of the power amplifier circuit but also improves its maintainability.

[0182] Of course, in practical applications, the splitter can also adopt other structures, which are not specifically limited here, in order to meet the needs of different scenarios and improve the flexibility of design.

[0183] For example, the structure of the shunt can also be seen below. Figure 23 , Figure 24 , Figure 26 , Figure 27 .

[0184] To more clearly illustrate the above-mentioned power amplifier circuit, device, and system, this application provides the following specific embodiments.

[0185] Example 1: As Figure 6 As shown, this embodiment uses a shunt as a positive shunt, and the power supply device includes a fixed power supply and a variable power supply as an example.

[0186] The output of the positive shunt is Vout, the output voltage of the fixed power supply is Vs, and the output voltage of the variable power supply is Vcp. Vcp is controlled by Vout. Vcp follows Vout with a certain difference greater than Vout, but the rate of change of Vcp is less than the rate of change of Vout. Vcp can only stabilize after Vout has stabilized for a period of time. Under DC steady state, the difference between Vcp and Vout is small.

[0187] Waveform diagram as follows Figure 17 As shown, when the input of the positive shunt changes and Vout rises to just entering the DC steady state, since the rise rate of Vcp is less than that of Vout, Vs>Vout>Vcp. At this time, Vcp cannot provide current to Vout, and the output current is provided to Vout through Vs. Therefore, the slower rise rate of Vcp will not affect the settling waveform and settling time of Vout. After Vout enters the DC steady state for a period of time, Vcp also enters the DC steady state following the rise of Vout, Vs>Vcp>Vout. At this time, the current is provided to Vout through Vcp. Since the difference between Vcp and Vout is small in the DC steady state, the positive shunt maintains a high-efficiency operating state.

[0188] Waveform diagram as follows Figure 18 As shown, when the input of the positive shunt changes and Vout drops to the DC steady state, Vcp decreases at a slower rate than Vout, so Vcp > Vout. At this time, the positive shunt always provides current to Vout through Vcp. When Vcp follows Vout to the steady state, the difference between Vcp and Vout decreases, and the positive shunt remains in a high-efficiency operating state.

[0189] It should be noted that, based on Example 1, as... Figure 28As shown, another example exists: taking a power supply device with two fixed power supplies and two variable power supplies, using a positive shunt and a negative shunt as examples. The positive shunt connects to a fixed power supply Vs and a variable power supply Vcp, while the negative shunt connects to a fixed power supply VE and a variable power supply Vcn, with an output voltage Vout. When both the positive and negative shunts are used, Vcp and Vcn are controlled by Vout. Vcp follows Vout with a certain difference greater than Vout, and Vcn follows Vout with a certain difference less than Vout. However, the rate of change of Vcp and Vcn is less than the rate of change of Vout, and Vcp and Vcn only stabilize after Vout has stabilized for a period of time.

[0190] In DC steady state, the positive shunt variable power supply Vcp outputs a voltage higher than Vout by a certain amount, and the negative shunt variable power supply Vcn outputs a voltage lower than Vout by a certain amount. When the power amplifier circuit outputs current, the positive shunt variable power supply Vcp provides power to Vout; when the power amplifier circuit draws current, the negative shunt variable power supply Vcn provides power to Vout. When both positive and negative shunts are present, at least two variable power supplies are set to provide energy to the power amplifier circuit, ensuring that only one variable power supply powers the power amplifier circuit at any given time, so that it has appropriate voltage support in each stage.

[0191] Example 2: This example is based on Example 1, such as... Figure 7 As shown, an additional fixed power supply has been added. That is, this embodiment uses a shunt as the positive shunt, and the power supply device includes two fixed power supplies and one variable power supply. The two fixed power supplies are the first fixed power supply and the second fixed power supply.

[0192] The output of the positive shunt is Vout, the output voltage of the first fixed power supply is Vs1, the output voltage of the second fixed power supply is Vs2, and the output voltage of the variable power supply is Vcp. Vcp is controlled by Vout. Vcp changes with Vout by a certain difference greater than Vout, but the rate of change of Vcp is less than the rate of change of Vout. Vcp can only stabilize after Vout has stabilized for a period of time. Under DC steady state, the difference between Vcp and Vout is small.

[0193] Waveform diagram as follows Figure 19As shown, when the input of the positive shunt changes to cause Vout to rise until it just enters the DC steady state, if Vs1 > Vs2 > Vout > Vcp, at this time the positive shunt provides output current for Vout through Vs2; if Vs1 > Vout > Vs2 > Vcp, at this time the positive shunt provides output current for Vout through Vs1. After Vout enters the DC steady state for a period of time, Vcp also enters the DC steady state following the rise of Vout. Whether Vs1 > Vs2 > Vcp > Vout or Vs2 > Vs1 > Vcp > Vout, at this time current is provided for Vout through Vcp. Since the difference between Vcp and Vout is small under DC steady state, the positive shunt remains in a high-efficiency operating state.

[0194] Similarly, when the input of the positive shunt changes to cause Vout to drop until it enters the DC steady state, the specific principle is similar to that of the above-mentioned first embodiment and will not be elaborated here.

[0195] Embodiment Three: As Figure 20 shown, in this embodiment, the shunt is a negative shunt, and the power supply device includes two fixed power supplies and a variable power supply as an example. Among them, the two fixed power supplies are the first fixed power supply and the second fixed power supply respectively.

[0196] The output of the negative shunt is Vout, the output voltage of the first fixed power supply is VE1, the output voltage of the second fixed power supply is VE2, the output voltage of the variable power supply is Vcn, Vcn is controlled by Vout, Vcn changes following Vout with a certain difference less than Vout, but the change speed of Vcn is less than the change speed of Vout, and Vcn can be stable only after a period of time when Vout is stable. The difference between Vcn and Vout is small under DC steady state.

[0197] The waveform diagram is as Figure 22 shown, when the input of the negative shunt changes to cause Vout to drop until it just enters the DC steady state, if VE1 < VE2 < Vout < Vcn, at this time the negative shunt provides suction current for Vout through VE2; if VE1 < Vout < VE2 < Vcn, at this time the negative shunt provides suction current for Vout through VE1. After Vout enters the DC steady state for a period of time, Vcn also enters the DC steady state following the drop of Vout. If Vout > Vcn > VE2 > VE1, at this time current is absorbed from Vout through Vcn. Since the difference between Vcn and Vout is small under DC steady state, the negative shunt remains in a high-efficiency operating state.

[0198] In addition, in order to more clearly illustrate the specific structure of the shunt, the present application provides the following specific embodiments.

[0199] Embodiment One:

[0200] In this embodiment, as Figure 23 As shown, the positive shunt includes: bias voltage Vbias1, bias voltage Vbias2, field-effect transistor M1, field-effect transistor M2, diode D1, diode D2 and resistor R1;

[0201] The bias voltage Vbias1 is electrically connected to the gate of the field-effect transistor M2, the drain of the field-effect transistor M2 is electrically connected to the cathode of the diode D1, and the anode of the diode D1 is electrically connected to the variable power supply.

[0202] The bias voltage Vbias1 is also electrically connected to the gate of the field-effect transistor M1 through the bias voltage Vbias2 and the diode D2 in series. The drain of the field-effect transistor M1 is electrically connected to the fixed power supply, and the source of the field-effect transistor M1 is electrically connected to the cathode of the diode D1.

[0203] One end of the resistor R1 is electrically connected to the gate of the field-effect transistor M1, and the other end is connected to the source of the field-effect transistor M1.

[0204] The output of the positive shunt is Vout, the output voltage of the fixed power supply is Vs, and the output voltage of the variable power supply is Vcp. Vcp is controlled by Vout. Vcp follows Vout with a certain difference greater than Vout, but the rate of change of Vcp is less than the maximum rate of change of Vout. Vcp can only stabilize after Vout has stabilized for a period of time. Under DC steady state, the difference between Vcp and Vout is small.

[0205] In steady-state DC operation, Vcp > Vout. The input voltage Vin turns on MOSFET M2 and conducts diode D1. The positive shunt provides current to Vout through Vcp. The bias voltage Vbias1 determines whether MOSFET M2 operates in class AB, class B, or class C. Simultaneously, a suitable bias voltage Vbias2 will prevent diode D2 from conducting, and resistor R1 keeps MOSFET M1's Vgs = 0V, placing M1 in the off state. The positive shunt will not provide current to Vout through Vs.

[0206] When the input voltage Vin rises, causing Vout to rise, since the rise rate of Vcp is less than that of Vout, Vout > Vcp. Diode D1 is cut off, and the positive shunt does not provide current to Vout through Vcp. The difference between Vin and Vout causes MOSFET M2 to turn on, lowering the source voltage of MOSFET M1 to be closer to Vout. At this point, a suitable bias voltage Vbias2 turns on diode D2, and the current flowing through diode D2 generates a voltage Vgs across R1, turning on MOSFET M1. The positive shunt then provides current to Vout through Vs. Therefore, the slower rise rate of Vcp does not affect the settling waveform and settling time of Vout. After Vout enters the DC steady state for a period of time, Vcp follows the rise of Vout and also enters the DC steady state. At this point, Vcp > Vout, diode D1 turns on, and the positive shunt provides output current to Vout through Vcp, entering the DC steady state. Since the difference between Vcp and Vout is small in the DC steady state, the positive shunt maintains a high-efficiency operating state.

[0207] When the input voltage Vin decreases, causing Vout to decrease, Vcp decreases at a slower rate than Vout, therefore Vcp > Vout. Diode D1 remains conducting, and the positive shunt continuously supplies current to Vout through Vcp. Once Vcp follows Vout to a steady state, the difference between Vcp and Vout decreases.

[0208] Example 2: Based on Example 1 above, a negative shunt is added, whose structure is the same as that of the positive shunt, as follows: Figure 24 As shown, its control principle is similar to that of Embodiment 1 above. For details, please refer to the above content, which will not be repeated here.

[0209] Example 3:

[0210] In this embodiment, as Figure 25 As shown, the positive shunt includes: bias voltage Vbias5, bias voltage Vbias6, field-effect transistor M5, field-effect transistor M6, and diode D5;

[0211] The bias voltage Vbias5 is electrically connected to the gate of the field-effect transistor M5, the drain of the field-effect transistor M5 is electrically connected to the cathode of the diode D5, and the anode of the diode D5 is electrically connected to the variable power supply.

[0212] The bias voltage Vbias6 is electrically connected to the gate of the field-effect transistor M6, the drain of the field-effect transistor M6 is electrically connected to the fixed power supply, and the source of the field-effect transistor M6 is electrically connected to the source of the field-effect transistor M5.

[0213] The output of the positive shunt is Vout, the output voltage of the fixed power supply is Vs, and the output voltage of the variable power supply is Vcp. Vcp is controlled by Vout. Vcp follows Vout with a certain difference greater than Vout, but the rate of change of Vcp is less than the rate of change of Vout. Vcp can only stabilize after Vout has stabilized for a period of time. Under DC steady state, the difference between Vcp and Vout is small.

[0214] In steady-state DC operation, Vcp > Vout, and diode D5 conducts. By setting appropriate bias voltages Vbias5 and Vbias6, and selecting suitable parameters for MOSFETs M5 and M6, the current flowing from Vcp to the output can be made significantly greater than the current flowing from Vs to the output for the same Vin. For example, with the same parameters for MOSFETs M5 and M6, Vbias5 can be set to be much larger than Vbias6. The positive shunt provides the vast majority of the current to Vout through Vcp, and almost no current to Vout is provided through Vs.

[0215] When the input voltage Vin rises, causing Vout to rise, since the rise rate of Vcp is less than that of Vout, Vout > Vcp. Diode D5 is cut off, and the positive shunt does not provide current to Vout through Vcp. The difference between Vin and Vout causes the field-effect transistor M6 to turn on, and the positive shunt provides current to Vout through Vs. Therefore, the slower rise rate of Vcp does not affect the settling waveform and settling time of Vout. After Vout enters the DC steady state for a period of time, Vcp follows the rise of Vout and also enters the DC steady state. At this time, Vcp > Vout, diode D5 turns on, and the positive shunt provides most of the current to Vout through Vcp, entering the DC steady state. Because the difference between Vcp and Vout is small in the DC steady state, the positive shunt maintains a high-efficiency operating state.

[0216] When the input voltage Vin decreases, causing Vout to decrease, Vcp decreases at a slower rate than Vout, therefore Vcp > Vout. Diode D5 remains conducting, and the positive shunt always provides the majority of the current to Vout through Vcp. Once Vcp follows Vout to a steady state, the difference between Vcp and Vout decreases.

[0217] Example 4:

[0218] In this embodiment, as Figure 26 As shown, the power supply device includes a first fixed power supply, a second fixed power supply, and a variable power supply; the positive shunt includes: bias voltage Vbias5, bias voltage Vbias6, bias voltage Vbias7, field-effect transistor M5, field-effect transistor M6, field-effect transistor M8, diode D5, and diode D6.

[0219] The bias voltage Vbias5 is electrically connected to the gate of the field-effect transistor M5, the drain of the field-effect transistor M5 is electrically connected to the cathode of the diode D5, and the anode of the diode D5 is electrically connected to the variable power supply.

[0220] The bias voltage Vbias6 is electrically connected to the gate of the field-effect transistor M6, the drain of the field-effect transistor M6 is electrically connected to the cathode of the diode D6, and the anode of the diode D6 is electrically connected to the second fixed power supply.

[0221] The bias voltage Vbias7 is electrically connected to the gate of the field-effect transistor M8, the drain of the field-effect transistor M8 is electrically connected to the first fixed power supply, and the source of the field-effect transistor M8, the source of the field-effect transistor M6, and the source of the field-effect transistor M5 are electrically connected.

[0222] The output of the positive shunt is Vout, the output voltage of the first fixed power supply is Vs1, the output voltage of the second fixed power supply is Vs2, and the output voltage of the variable power supply is Vcp. Vcp is controlled by Vout. Vcp changes with Vout by a certain difference greater than Vout, but the rate of change of Vcp is less than the rate of change of Vout. Vcp can only stabilize after Vout has stabilized for a period of time. Under DC steady state, the difference between Vcp and Vout is small.

[0223] In steady-state DC operation, Vcp > Vout, and diode D5 conducts. By setting appropriate bias voltages Vbias5, Vbias6, and Vbias7, and selecting suitable parameters for MOSFETs M5, M6, and M8, the current flowing from Vcp to the output can be made significantly greater than the current flowing from Vs1 or Vs2 to the output for the same Vin. For example, with the same parameters for MOSFETs M5, M6, and M8, Vbias5 can be set to be much greater than Vbias6 and Vbias7. The positive shunt provides the vast majority of the current to Vout through Vcp, and almost no current to Vout is provided through Vs1 and Vs2.

[0224] When the input voltage Vin rises, causing Vout to rise, since the rise rate of Vcp is less than that of Vout, Vout > Vcp. Diode D5 is cut off, and the positive shunt will not provide current to Vout through Vcp. When Vs1 > Vs2 > Vout > Vcp, diode D6 turns on. By setting appropriate bias voltages Vbias6 and Vbias7, and selecting appropriate parameters for MOSFETs M6 and M8, the current flowing from Vs2 to the output can be made much greater than the current flowing from Vs1 to the output for the same Vin. For example, with the same parameters for MOSFETs M6 and M8, Vbias6 can be set much larger than Vbia7. In this case, the positive shunt provides most of the current to Vout through Vs2. When Vs1 > Vout > Vs2 > Vcp, diode D6 is cut off. The difference between Vin and Vout will cause MOSFET M8 to turn on, and the positive shunt will provide current to Vout through Vs1. Therefore, the slower rise rate of Vcp will not affect the settling waveform and settling time of Vout. After Vout reaches DC steady state for a period of time, Vcp also enters DC steady state following the rise of Vout. At this time, Vcp > Vout, diode D5 conducts, and the positive shunt provides most of the current to Vout through Vcp, entering the DC steady state. Since the difference between Vcp and Vout is small in DC steady state, the positive shunt maintains a high-efficiency operating state.

[0225] When the input voltage Vin decreases, causing Vout to decrease, Vcp decreases at a slower rate than Vout, therefore Vcp > Vout. Diode D5 remains conducting, and the positive shunt always provides the majority of the current to Vout through Vcp. Once Vcp follows Vout to a steady state, the difference between Vcp and Vout decreases.

[0226] Example 5:

[0227] In this embodiment, as Figure 27 As shown, the power supply device includes a first fixed power supply, a second fixed power supply, and a variable power supply; the negative shunt includes: bias voltage Vbias1, bias voltage Vbias2, bias voltage Vbias3, field-effect transistor M1, field-effect transistor M2, field-effect transistor M3, diode D1, and diode D2.

[0228] The bias voltage Vbias1 is electrically connected to the gate of the field-effect transistor M1, the drain of the field-effect transistor M1 is electrically connected to the anode of the diode D1, and the cathode of the diode D1 is electrically connected to the variable power supply.

[0229] The bias voltage Vbias2 is electrically connected to the gate of the field effect transistor M2. The drain of the field effect transistor M2 is electrically connected to the anode of the diode D2, and the cathode of the diode D2 is electrically connected to the second fixed power supply;

[0230] The bias voltage Vbias3 is electrically connected to the gate of the field effect transistor M3. The drain of the field effect transistor M3 is electrically connected to the first fixed power supply. The sources of the field effect transistor M1, the field effect transistor M2, and the field effect transistor M3 are electrically connected to each other.

[0231] The output of the negative shunt is Vout, the output voltage of the first fixed power supply is VE1, the output voltage of the second fixed power supply is VE2, and the output voltage of the variable power supply is Vcn. Vcn is controlled by Vout. Vcn changes following Vout with a certain difference less than Vout, but the change speed of Vcn is less than that of Vout. Vcn can only be stable after a period of time when Vout is stable. The difference between Vcn and Vout is small in the DC steady state.

[0232] In the DC steady state, Vcn < Vout and the diode D1 conducts. By setting appropriate bias voltages Vbias1, Vbias2, and Vbias3, and selecting appropriate device parameters of the field effect transistor M1, the field effect transistor M2, and the field effect transistor M3, the current flowing from the output to Vcn is much larger than the current flowing to VE1 or VE2 under the same Vin. For example, when the parameters of the field effect transistor M1, the field effect transistor M2, and the field effect transistor M3 are the same, Vbias1 is set to be much larger than Vbias2 and Vbias1 is much larger than Vbias3. The negative shunt absorbs most of the current from Vout through Vcn, and the negative shunt hardly absorbs current from Vout through VE1 and VE2.

[0233] When the input voltage Vin drops and causes Vout to drop, since the dropping speed of Vcn is less than that of Vout, at this time Vout < Vcn, the diode D1 is cut off, and the negative shunt does not absorb current from Vout through Vcn. When VE1 < VE2 < Vout < Vcn, the diode D2 conducts. By setting appropriate bias voltages Vbias2 and Vbias3, and selecting appropriate device parameters of the field effect transistor M2 and the field effect transistor M3, the current flowing from Vout to VE2 is much larger than the current flowing from Vout to VE1 under the same Vin. For example, when the parameters of the field effect transistor M2 and the field effect transistor M3 are the same, Vbias2 is set much larger than Vbias3. At this time, the negative shunt absorbs most of the current from Vout through VE2. When VE1 < Vout < VE2 < Vcn, the diode D2 is cut off. The difference between Vin and Vout causes the field effect transistor M3 to turn on, and the negative shunt absorbs current from Vout through VE1. Therefore, the slower dropping speed of Vcn does not affect the establishment waveform and establishment time of Vout. After Vout enters the DC steady state for a period of time, Vcn also enters the DC steady state following the drop of Vout. At this time, Vcn < Vout, the diode D1 conducts, and the negative shunt absorbs most of the current from Vout through Vcn and enters the DC steady state. Since the difference between Vcn and Vout is small under DC steady state, the negative shunt remains in a high-efficiency working state.

[0234] When the input voltage Vin rises and causes Vout to rise, since the rising speed of Vcn is less than that of Vout, so Vcn < Vout, the diode D1 is always on, and the negative shunt always absorbs most of the current from Vout through Vcn. After Vcn follows Vout and drops to the steady state, the difference between Vcn and Vout becomes smaller.

[0235] It should be noted that the field effect transistor (MOSFET) used in the above embodiments can also use three-terminal devices such as BJTs to complete the design of the shunt structure in other embodiments. As long as the design of the shunt can be achieved, the specific device used is not limited, and all belong to the protection scope of this application.

[0236] The control method of this application is applied to a power amplifier circuit that integrates a power amplifier, a shunt, and a power supply device including at least one fixed power supply and one variable power supply. Specifically, during the output waveform establishment phase of the power amplifier circuit, the control method intelligently selects at least one fixed power supply to power the power amplifier circuit via the shunt. At least one of these fixed power supplies has an output voltage higher than the maximum output voltage of the shunt, ensuring that the power amplifier circuit can respond quickly and establish a stable output waveform. Once the output of the power amplifier circuit reaches the DC steady-state phase, the shunt is switched to the variable power supply. The output voltage of the variable power supply can change with the shunt output voltage, although the change rate is slower. However, during the DC steady-state phase, its output voltage is higher than the shunt output voltage, thereby maintaining the high-efficiency operation of the power amplifier circuit.

[0237] In another embodiment of this application, regardless of whether it is the waveform setup stage or the DC steady-state stage, when the rate of change of the variable power supply is faster than the rate of change of the output voltage of the power amplifier circuit, the shunt can choose to use the variable power supply to power the power amplifier circuit, or select the variable power supply to provide partial power to it. It should be noted that the selection method of the variable power supply is not limited to the method provided in the above embodiments, and can be set according to the user's needs.

[0238] The inventive points and corresponding technical effects of this application are as follows:

[0239] (1) The innovation of this application lies in proposing an innovative shunt design, applied when the rate of change of the variable power supply is slower than the maximum rate of change of the power amplifier circuit's output voltage. This design can effectively shunt the power supply output under different output voltages of the power amplifier circuit. Specifically, during the waveform establishment phase of the power amplifier circuit's output, a fixed power supply is used to ensure that the waveform is established quickly and stably; however, after the power amplifier circuit's output enters the DC steady-state phase, a variable power supply is used. At this time, the output voltage of the variable power supply is dynamically adjusted according to the actual output voltage of the power amplifier circuit to minimize the voltage difference between the two. This design not only helps reduce power consumption but also significantly improves the power amplifier's operating efficiency.

[0240] (2) The innovation of this application lies in the ingenious combination of a fixed power supply and a variable power supply to form a novel power supply device. During the waveform establishment stage of the power amplifier circuit output, the fixed power supply can respond quickly, accelerating the waveform establishment process. Once the power amplifier circuit output reaches the DC steady-state stage, it switches to the variable power supply, which can adjust the output voltage according to actual needs, further optimizing the operating efficiency of the power amplifier. This combination not only speeds up the startup speed of the power amplifier circuit but also effectively improves the overall performance of the power amplifier circuit.

[0241] (3) The innovation of this application also lies in the unique bidirectional power transmission function of the variable power supply used. It can absorb power from the system power supply and provide the required power to the power amplifier circuit, and under certain conditions, it can also recover excess power from the power amplifier circuit and transmit it back to the system power supply. This not only makes the energy utilization within the system more efficient, but also allows the recovered energy to be distributed to other devices or systems that need it through the system power supply, thereby maximizing the utilization of resources.

[0242] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0243] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0244] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0245] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0246] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0247] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, is used to perform the above-described method, which includes at least one of the schemes described in the above embodiments.

[0248] The computer storage medium in this application embodiment can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0249] Furthermore, the terms "first, second, third, etc." or similar terms such as module A, module B, and module C used in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that, where permissible, a specific order or sequence may be interchanged so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0250] In the above description, the labels of the steps involved, such as S110, S120, etc., do not mean that the steps will necessarily be executed. The order of the steps can be interchanged or executed simultaneously if permitted.

[0251] The term "comprising" as used in the specification and claims should not be construed as limiting itself to what follows; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying the presence of the mentioned feature, integral, step, or component, but does not exclude the presence or addition of one or more other features, integrals, steps, or components, or groups thereof. Thus, the statement "device comprising means A and B" should not be limited to a device consisting solely of components A and B.

[0252] The terms "an embodiment" or "an embodiment" as used in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in at least one embodiment of this application. Therefore, the terms "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics can be combined in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0253] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, all of which fall within the scope of protection of this application.

Claims

1. A power amplifier circuit, characterized in that, include: A power amplifier having a first input terminal, a second input terminal, and an output terminal; The first input terminal is electrically connected to the input signal source; A shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the shunt serves as the output terminal of the power amplifier circuit. A power supply device includes at least one fixed power supply and one variable power supply, wherein the fixed power supply and the variable power supply are electrically connected to the power terminals of the shunt in a one-to-one correspondence; wherein the output voltage of the variable power supply changes with the output voltage of the shunt, and the rate of change is slower than the maximum rate of change of the output voltage of the shunt; and when the power amplifier circuit is in a DC steady-state phase, when the power amplifier circuit outputs current, the output voltage of the variable power supply is higher than the output voltage of the shunt; when the power amplifier circuit absorbs current, the output voltage of the variable power supply is lower than the output voltage of the shunt. The shunt is used to select the use of at least one fixed power supply during the waveform establishment phase of the power amplifier circuit output, and to select the use of the variable power supply during the DC steady state phase of the power amplifier circuit output.

2. The power amplifier circuit as described in claim 1, characterized in that, The shunt is a positive shunt, and the output voltage of at least one of the fixed power supplies is higher than the maximum output voltage of the shunt and higher than the output voltage of the variable power supply when the power amplifier circuit output is in the DC steady state stage. And / or, the shunt is a negative shunt, and the output voltage of at least one of the fixed power supplies is lower than the minimum output voltage of the shunt and lower than the output voltage of the variable power supply when the power amplifier circuit output is in the DC steady state phase.

3. The power amplifier circuit as described in claim 1 or 2, characterized in that, When the at least one fixed power source includes two or more fixed power sources, the output voltage of each fixed power source is different; The shunt is used to select at least one fixed power supply for power supply during the power amplifier circuit output waveform establishment phase, including: the shunt is used to select, in real time or periodically, a fixed power supply with a voltage value lower than the current output voltage of the shunt and the smallest output voltage value, and / or select, in real time or periodically, a fixed power supply with a voltage value lower than the current output voltage of the shunt and the largest output voltage value, as the currently selected fixed power supply.

4. The power amplifier circuit as described in claim 1, characterized in that, The output voltage of the variable power supply changes in accordance with the output voltage of the shunt, including: The output voltage of the variable power supply changes linearly following the output voltage of the shunt.

5. The power amplifier circuit as described in claim 1, characterized in that, The variable power supply includes a bidirectional variable power supply, comprising: an input first port, an input second port, an output first port, and an output second port; wherein: When current flows out from the first input port and into the second input port, and the potential of the first input port is higher than that of the second input port, the variable power supply is in a power supply state. When current flows from the first input port and flows out from the second input port, and the potential of the first input port is higher than that of the second input port, the variable power supply is in a power absorption state. When current flows out from the first output port and into the second output port, and the potential of the first output port is higher than that of the second output port, the variable power supply is in a power supply state. When current flows from the first output port and flows out from the second output port, and the potential of the first output port is higher than that of the second output port, the variable power supply is in a power absorption state.

6. The power amplifier circuit as described in claim 1, characterized in that, The shunt includes one of the following: When a positive shunt is included: the positive shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the positive shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the positive shunt serves as the output terminal of the power amplifier circuit; the fixed power supply and the variable power supply are respectively electrically connected to the power supply terminals of the positive shunt in a one-to-one correspondence. When a negative shunt is included: the negative shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminal of the negative shunt is electrically connected to the output terminal of the power amplifier, and the output terminal of the negative shunt serves as the output terminal of the power amplifier circuit; the fixed power supply and the variable power supply are respectively electrically connected to the power supply terminals of the negative shunt in a one-to-one correspondence. When a combined shunt consisting of a positive shunt and a negative shunt is used: the combined shunt has an input terminal, an output terminal, and at least two power supply terminals; the input terminals of the positive shunt and the negative shunt are the input terminals of the combined shunt, which are electrically connected to the output terminal of the power amplifier; the output terminals of the positive shunt and the negative shunt are the output terminals of the combined shunt, and also serve as the output terminals of the power amplifier circuit; the fixed power supply and the variable power supply are electrically connected to the power supply terminals of the combined shunt in a one-to-one correspondence.

7. The power amplifier circuit as described in claim 6, characterized in that, When the shunt includes a combined shunt consisting of a positive shunt and a negative shunt, at the same time, either the positive shunt or the negative shunt is operating; the power supply device further includes: A current detection device is electrically connected to the output terminal of the power amplifier circuit to detect the direction of the output current of the power amplifier circuit and select whether the positive shunt or the negative shunt is working based on it. A voltage detection device is electrically connected to the output terminal of the power amplifier circuit to detect the output voltage of the power amplifier circuit and adjust the output voltage of the variable power supply accordingly. When the current detection device detects that the power amplifier circuit is outputting current, the positive shunt operates. The voltage detection device adjusts the output voltage of the variable power supply according to the detected output voltage of the power amplifier circuit, so that the difference between the output voltage of the variable power supply and the output voltage of the power amplifier circuit is positive. When the current detection device detects that the power amplifier circuit is absorbing current, the negative shunt operates. The voltage detection device adjusts the output voltage of the variable power supply according to the detected output voltage of the power amplifier circuit, so that the difference between the output voltage of the variable power supply and the output voltage of the power amplifier circuit is negative.

8. The power amplifier circuit as described in claim 1, characterized in that, The shunt includes: bias voltage Vbias5, bias voltage Vbias6, field-effect transistor M5, field-effect transistor M6, and diode D5; The bias voltage Vbias5 is electrically connected to the gate of the field-effect transistor M5, the drain of the field-effect transistor M5 is electrically connected to the cathode of the diode D5, and the anode of the diode D5 is electrically connected to the variable power supply. The bias voltage Vbias6 is electrically connected to the gate of the field-effect transistor M6, the drain of the field-effect transistor M6 is electrically connected to the fixed power supply, and the source of the field-effect transistor M6 is electrically connected to the source of the field-effect transistor M5.

9. A power amplifier device, characterized in that, include: A system power supply, at least a first power amplifier circuit and a second power amplifier circuit, wherein the first power amplifier circuit and the second power amplifier circuit are power amplifier circuits as described in any one of claims 1-8; The input first port and input second port of the variable power supply in the first power amplifier circuit and the variable power supply in the second power amplifier circuit are connected in parallel and connected to the output first port and output second port of the system power supply.

10. A power amplifier system, characterized in that, It includes at least a first power amplifier and a second power amplifier; The first power amplifier device includes the power amplifier circuit as described in any one of claims 1-8 and a first system power supply, wherein the power amplifier circuit includes a variable power supply with an input first port and an input second port electrically connected to the output first port and the output second port of the first system power supply, respectively. The second power amplifier device includes the power amplifier circuit and the second system power supply as described in any one of claims 1-8, wherein the power amplifier circuit includes an input first port and an input second port of the variable power supply, which are respectively electrically connected to the output first port and the output second port of the second system power supply. The first input port and the second input port of the first system power supply are electrically connected to the first input port and the second input port of the second system power supply, respectively.

11. A control method for a power amplifier circuit, characterized in that, Applied to the power amplifier circuit according to any one of claims 1-8, the method includes: During the power amplifier circuit output waveform establishment stage, at least one fixed power supply is selected through a shunt to power the circuit. When the output of the power amplifier circuit reaches the DC steady state, a variable power supply is selected through a shunt to power the circuit.

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