Power amplifier control method, device, power amplifier system and storage medium

Abstract

The present application relates to a power amplifier control method, device, power amplifier system and storage medium. The method is applied to a power amplifier system, which includes a power amplifier, and the method includes: when the startup time arrives, outputting a first driving voltage to the power amplifier so that the power amplifier enters a working state and operates under the drive of the first driving voltage; when the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, outputting a second driving voltage to the power amplifier so that the power amplifier operates under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the power amplifier working bias voltage is determined according to the second driving voltage. In the present application, even if the power amplifier operates at the same temperature, the driving voltage output to the power amplifier will change with time, thereby accelerating the startup speed of the power amplifier and solving the problem of performance deterioration of the power amplifier.

Description

Technical Field

[0001] The present application relates to the field of power amplification technology, and in particular to a power amplifier control method, device, power amplification system and storage medium. Background Art

[0002] In the TDD (Time Division Duplexing) communication process, the uplink signal and the downlink signal are carried out in different time slots of the same frequency, and an idle protection time interval is left between the uplink time slot and the downlink time slot to avoid collision and mutual influence between the uplink signal and the downlink signal. That is, when the uplink time slot arrives, the uplink is turned on and the downlink is turned off. When the downlink time slot arrives, the downlink is turned on and the uplink is turned off. It can be seen that the uplink works in an open-close cycle, and the downlink works in a close-open cycle.

[0003] The on / off control of the uplink and downlink is generally achieved by controlling the working state of the RF power amplifier in the link. However, under the control of traditional methods, the gate bias circuit cannot be placed with large-capacitance capacitors, resulting in deterioration of the performance of the RF power amplifier. At the same time, some RF power amplifiers are affected by their own inherent defect effects. In the short time slot when the RF power amplifier is just turned on, the static current of the RF power amplifier cannot quickly return to the normal value, resulting in performance deterioration and reduced communication reliability. Summary of the invention

[0004] Based on this, it is necessary to provide a power amplifier control method, device, power amplifier system and storage medium that can solve the problem of power amplifier performance deterioration to improve communication reliability in response to the above technical problems.

[0005] A power amplifier control method is applied to a power amplifier system, wherein the power amplifier system includes a power amplifier. The method includes:

[0006] When the start-up time arrives, outputting a first driving voltage to the power amplifier so that the power amplifier enters a working state and operates under the driving of the first driving voltage;

[0007] When the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, a second driving voltage is output to the power amplifier so that the power amplifier works under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the power amplifier working bias voltage is determined according to the second driving voltage.

[0008] A power amplifier control device is applied to a power amplifier system, the power amplifier system includes a power amplifier; the device includes a driving circuit for connecting to the power amplifier;

[0009] The driving circuit is used to output a first driving voltage to the power amplifier when the startup time arrives, so that the power amplifier enters the working state and operates under the drive of the first driving voltage; the driving circuit is also used to output a second driving voltage to the power amplifier when the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, so that the power amplifier operates under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the power amplifier working bias voltage is determined according to the second driving voltage.

[0010] A power amplifier control device is applied to a power amplifier system, wherein the power amplifier system includes a power amplifier; the device includes:

[0011] A first driving voltage output module, used for outputting a first driving voltage to the power amplifier when the start-up time arrives, so that the power amplifier enters a working state and works under the drive of the first driving voltage;

[0012] The second driving voltage output module is used to output the second driving voltage to the power amplifier when the control terminal voltage of the power amplifier reaches the working bias voltage of the power amplifier, so that the power amplifier works under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the working bias voltage of the power amplifier is determined according to the second driving voltage.

[0013] A power amplifier control device is applied to a power amplifier system, wherein the power amplifier system includes a power amplifier; the device includes a power amplifier controller for connecting to the power amplifier. The power amplifier controller includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0014] When the start-up time arrives, outputting a first driving voltage to the power amplifier so that the power amplifier enters a working state and operates under the driving of the first driving voltage;

[0015] When the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, a second driving voltage is output to the power amplifier so that the power amplifier works under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the power amplifier working bias voltage is determined according to the second driving voltage.

[0016] A power amplification system, the system comprising:

[0017] The power amplifier control device in any of the above embodiments;

[0018] The power amplifier device includes a power amplifier; the power amplifier is connected to the power amplifier control device, and is used to amplify the radio frequency signal under the drive of the first driving voltage or the second driving voltage, and output the amplified radio frequency signal.

[0019] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0020] When the start-up time arrives, outputting a first driving voltage to the power amplifier so that the power amplifier enters a working state and operates under the driving of the first driving voltage;

[0021] When the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, a second driving voltage is output to the power amplifier so that the power amplifier works under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the power amplifier working bias voltage is determined according to the second driving voltage.

[0022] In the above-mentioned power amplifier control method, device, power amplifier system and storage medium, even if the power amplifier operates at the same temperature, the driving voltage output to the power amplifier will change with time. Specifically, when starting the power amplifier, the control device first outputs a first driving voltage with a larger voltage value to the power amplifier, so that the control terminal voltage of the power amplifier can be quickly adjusted to the power amplifier working bias voltage, so that the power amplifier can quickly enter the target working state within the protection time interval. When the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, the target driving voltage (i.e., the second driving voltage) is output to the power amplifier, so that the device continues to work in the target working state to amplify the signal.

[0023] On the one hand, under the action of the first driving voltage, the control terminal voltage of the power amplifier can be quickly adjusted to the working bias voltage of the power amplifier. In this way, even if a large-capacitance capacitor is provided in the bias network of the power amplifier, the power amplifier can complete the switching of the on and off states within the protection time interval, and then on the basis of meeting the switching time requirements of the power amplifier, the performance of the power amplifier can be improved by setting a large-capacitance capacitor in the power amplifier network. On the other hand, the present application can eliminate the virtual gate of the power amplifier through a first driving voltage with a higher voltage value, so that the power amplifier can reach the target working state under the drive of the second driving voltage, thereby solving the performance deterioration problem of the power amplifier and improving communication reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural block diagram of a traditional RF power amplifier control circuit;

[0026] Figure 2 This is a schematic diagram of a first flow chart of a power amplifier control method in one embodiment of the present application;

[0027] Figure 3 This is a second flow chart of a power amplifier control method in one embodiment of the present application;

[0028] Figure 4 A first signal waveform diagram of a control signal in one embodiment of the present application;

[0029] Figure 5 A second signal waveform diagram of a control signal in one embodiment of the present application;

[0030] Figure 6 This is a circuit diagram of an addition and subtraction circuit in one embodiment of the present application;

[0031] Figure 7 A circuit diagram of an addition and subtraction circuit in one embodiment of the present application;

[0032] Figure 8 This is a first structural block diagram of a power amplifier control device in one embodiment of the present application;

[0033] Fig. 9 This is a second structural block diagram of a power amplifier control device in one embodiment of the present application;

[0034] Fig.10 This is a third structural block diagram of a power amplifier control device in one embodiment of the present application;

[0035] Fig.11 This is a structural block diagram of a power amplification system in one embodiment of the present application;

[0036] Fig.12 Schematic diagram of a first bias circuit in one embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0039] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements / signals, but these elements / signals are not limited by these terms. These terms are only used to distinguish a first element / signal from another element / signal. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0040] It can be understood that the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc., if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other. The "reach" in the following embodiments can be understood as greater than, or greater than or equal to.

[0041] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0042] See also Figure 1 , Figure 1The block diagram of the structure of the conventional RF power amplifier control circuit is shown. Among them, the single-pole double-throw switch 102 includes a first end, a second end, a third end and a control end, the first end is used to receive a high voltage gate voltage Vg1, the second end is used to receive a low voltage gate voltage Vg2, and the third end is used to connect the gate bias network 104 and apply a control voltage to the control end of the RF power amplifier 106 through the gate bias network 104. The control end of the single-pole double-throw switch 102 is used to receive a switching control signal so that it can selectively conduct the connection between the third end and the first end / second end under the control of the switching switch signal. When the third end is connected to the first end, the single-pole double-throw switch 102 applies a high voltage gate voltage Vg1 to the RF power amplifier 106 to turn on and operate normally. When the third end is connected to the second end, the single-pole double-throw switch 102 applies a low voltage gate voltage Vg2 to the control end of the RF power amplifier 106 to turn off the RF power amplifier 106. At this time, the RF power amplifier 106 can be regarded as a circuit breaker, and the link provided with the RF power amplifier 106 stops working.

[0043] In this way, by outputting corresponding switching control signals to the RF power amplifiers 106 of the uplink and downlink respectively, the states of the RF power amplifiers 106 in the two links can be controlled, so that the uplink and downlink can work in different time slots respectively and realize TDD communication.

[0044] As described in the background technology, when the RF power amplifier is controlled to start and stop by the traditional method, the RF power amplifier has the problem of performance deterioration, which reduces the communication reliability. The inventors have found that the reasons for this problem are: (1) In the traditional technology, for all types of RF power amplifiers, the voltage value of the high voltage gate voltage Vg1 only changes with the change of the operating temperature (or device temperature) of the RF power amplifier. At the same operating temperature (or device temperature), the voltage value of the high voltage gate voltage Vg1 remains constant. Under this control mode, considering that the current capacity of the bias network in the actual circuit is small and the charging time of the large-capacitance capacitor is long, in order to ensure that the RF power amplifier can complete the start and stop switching within the protection time interval (such as within 3us), the gate bias network cannot be provided with a large-capacitance capacitor. Therefore, the prior art needs to use a capacitor of nanofarad or below to realize the gate bias network. Under this setting mode, the gate memory effect of the RF power amplifier is serious, and its linear performance for non-constant envelope signals and broadband signals deteriorates.

[0045] (2) Under the influence of the inherent characteristics of the device (such as the inherent defect effect of the heterojunction transistor), the RF power amplifier produces a virtual gate, which increases its threshold drift. Therefore, in the short time slot just after it is turned on, under the action of the target driving voltage corresponding to the target working state, the RF power amplifier cannot quickly recover to the quiescent current required for normal operation, resulting in the performance of the RF power amplifier deteriorating in the short time slot just after it is turned on.

[0046] Based on this, it is necessary to provide a power amplifier control method, device, power amplifier system and storage medium that can solve the problem of power amplifier performance deterioration and thereby improve communication reliability.

[0047] In one embodiment, a power amplifier control method is provided, which can be applied in a power amplifier system. The power amplifier system refers to a circuit / device / system that can amplify and output an input signal. In one embodiment, the power amplifier system can amplify and output a radio frequency signal.

[0048] The power amplifier system includes a power amplifier, wherein the power amplifier refers to any device or circuit with a signal amplification function, which may be, but is not limited to, a MOS (Metal-Oxide-Semiconductor Field-EffectTransistor) tube, a BJT (Bipolar Junction Transistor) and an amplifier circuit implemented based on any circuit structure. It can be understood that the specific connection relationship and / or specific implementation method of the power amplifier can be determined according to the application environment, amplification requirements, and circuit connection structure of the power amplifier system, and the present application does not impose specific restrictions on this. The method of the present application can be used to control a power amplifier based on any principle (such as a MOS tube and a BJT), any structure (such as an enhancement MOS tube and a depletion MOS tube), and any type (such as an N-channel MOS tube and a P-channel MOS tube, NPN and PNP). For ease of description, some embodiments of the present application use an N-channel MOS tube to implement a power amplifier as an example, and the control end of the power amplifier can be a gate.

[0049] Take the power amplifier control device (hereinafter referred to as the control device) to perform the power amplifier control method as an example for explanation, please refer to Figure 2 , the method comprises the following steps:

[0050] Step S200, when the start-up time arrives, outputting a first driving voltage to the power amplifier, so that the power amplifier enters a working state and operates under the driving of the first driving voltage;

[0051] Step S300, when the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, output a second driving voltage to the power amplifier so that the power amplifier works under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the power amplifier working bias voltage is determined according to the second driving voltage.

[0052] Wherein, the driving voltage refers to the voltage value that can control the power amplifier to amplify the input signal. The second driving voltage refers to the driving voltage that can make the performance of the power amplifier (including but not limited to linear performance, efficiency and amplification factor) achieve the expected effect. The voltage value of the second driving voltage can be obtained after multiple debugging and testing. This application does not impose specific restrictions on this. It is only necessary that the power amplifier can operate in the target working state under the drive of the second driving voltage. Wherein, the target working state refers to the working state in which the performance of the power amplifier can meet the expected effect. In one embodiment, the voltage value of the second driving voltage can be kept constant. In other words, in the process of outputting the second driving voltage, if the operating temperature of the power amplifier is the same, the voltage values ​​of the second driving voltage output by the control device at different times are equal.

[0053] The power amplifier working bias voltage is the voltage that instructs the power amplifier to enter the target working state from the off state, which can be determined according to the second driving voltage. Further, the power amplifier working bias voltage can also be determined according to the device type of the power amplifier. In one embodiment, when the power amplifier is a non-heterojunction transistor (such as LDMOS), the power amplifier working bias voltage can be the second driving voltage. At this time, the control device outputs the second driving voltage to the power amplifier when the control terminal voltage of the power amplifier reaches the second driving voltage. When the power amplifier is a heterojunction transistor (such as a gallium nitride transistor), considering the defect effect of the heterojunction transistor, the turn-on threshold drift of the heterojunction transistor increases (for example, from -3.5V to -3.4V), and when the control terminal voltage reaches the second driving voltage, the heterojunction transistor still cannot quickly reach the preset static operating point. At this time, the power amplifier working bias voltage can be greater than the second driving voltage, and the problem of the transistor turn-on threshold drift caused by the defect effect is eliminated by making the control terminal voltage higher than the second driving voltage. In one example, the power amplifier operating bias voltage may be the sum of the second driving voltage and a preset voltage difference, wherein the preset voltage difference is a positive voltage value. The preset voltage difference is used to eliminate the turn-on threshold drift of the heterojunction transistor, and its specific voltage value may be determined according to the relationship between the turn-on threshold recovery speed and the voltage of the transistor, and the present application does not impose specific restrictions on this. Furthermore, the larger the preset voltage difference, the faster the recovery speed of the heterojunction transistor.

[0054] The first drive voltage refers to a drive signal whose voltage value is higher than the voltage value of the second drive voltage. It should be noted that the voltage value of the first drive voltage can be either constant or change with time. When the voltage value of the first drive voltage changes with time, the minimum voltage value of the first drive voltage should be greater than the maximum voltage value of the second drive voltage. In other words, in the process of outputting the first drive voltage, the control device can output the same or different first drive voltages at different times, and the voltage value of the first drive voltage output at each time is greater than the maximum voltage value of the second drive voltage.

[0055] Specifically, after the start-up time arrives, the control device needs to switch the power amplifier from the off state to the working state. In addition, the control device also needs to switch the state of the power amplifier to the target working state before the end of the protection time interval, and make the power amplifier continue to work in the target working state in the uplink time slot / downlink time slot. It not only ensures that the start-up time of the power amplifier can meet the requirements, but also ensures that the performance of the power amplifier in the uplink time slot / downlink time slot meets expectations, and amplifies the input signal and outputs it, thereby ensuring the normal communication.

[0056] When the start-up time arrives, the control device outputs a first driving voltage to the control terminal of the power amplifier. After receiving the first driving voltage, the power amplifier switches from the off state to the working state and can amplify the input signal. Since the first driving voltage is greater than the second driving voltage, on the one hand, the virtual gate of the power amplifier can be eliminated by the first driving voltage, so that the turn-on threshold of the power amplifier is restored to the original threshold value. On the other hand, the charging time of the capacitor in the bias network of the power amplifier can be significantly shortened. Even when the bias network is provided with a large-capacitance capacitor, the control terminal voltage of the power amplifier can be quickly adjusted to the working bias voltage of the power amplifier, so that the power amplifier can work in the target working state, thereby solving the performance deterioration problem caused by the defect effect of the power amplifier (such as the gallium nitride power amplifier).

[0057] When the voltage at the control terminal of the power amplifier is greater than or equal to the working bias voltage of the power amplifier, the control device outputs a second driving voltage to the control terminal of the power amplifier to maintain the voltage at the control terminal of the power amplifier at the second driving voltage. In this way, the state of the power amplifier can be maintained at the target working state, so that the performance of the power amplifier meets expectations in both the uplink time slot and the downlink time slot, and the input signal continues to be amplified.

[0058] In the same startup period of the power amplifier, even if the operating temperature / device temperature of the power amplifier remains unchanged, the driving voltage output by the control device is no longer constant, but will change over time. The control device successively outputs a first driving voltage and a second driving voltage with different voltage values ​​to the power amplifier, and determines the switching timing of the first driving voltage and the second driving voltage according to the control terminal voltage of the power amplifier. In this way, through the first driving voltage with a larger voltage value, on the one hand, the control terminal voltage of the power amplifier is quickly adjusted to the working bias voltage of the power amplifier, thereby improving the startup speed. Even if a large-capacitance capacitor is provided in the bias network of the power amplifier, the power amplifier can complete the switching of the on-off state within the protection time interval. On the other hand, the virtual gate of the power amplifier can also be eliminated by the first driving voltage with a higher voltage value, so that the power amplifier can reach the target working state under the drive of the second driving voltage.

[0059] In one embodiment, if Figure 3 As shown, the power amplifier control method also includes:

[0060] Step S400: When the shutdown time arrives, output a shutdown voltage to the power amplifier to shut down the power amplifier.

[0061] Among them, the specific voltage value of the shutdown voltage can be determined based on the device parameters, device type and / or connection relationship of the power amplifier. This application does not impose specific restrictions on this, as long as the power amplifier can be turned off. Specifically, during the TDD communication process, the power amplifier works in an on-off cycle. The control device can control the power amplifier to turn off by turning off the voltage to disconnect the link with the power amplifier, so that the working status of the uplink and downlink can be adjusted according to the communication time slot, further improving the communication reliability.

[0062] In the above power amplifier control method, when starting the power amplifier, the control device first outputs a first driving voltage with a larger voltage value to the power amplifier, so that the control terminal voltage of the power amplifier can be quickly adjusted to the power amplifier working bias voltage, so that the power amplifier enters the target working state within the protection time interval. When the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, the target driving voltage (i.e., the second driving voltage) is output to the power amplifier, so that the device continues to work in the target working state to amplify the signal. On the one hand, under the action of the first driving voltage, the control terminal voltage of the power amplifier can be quickly adjusted to the power amplifier working bias voltage, so that even if a large capacitance capacitor is provided in the power amplifier bias network, the power amplifier can complete the switching of the on-off state within the protection time interval, and then on the basis of meeting the power amplifier switching time requirements, the performance of the power amplifier can be improved by setting a large capacitance capacitor in the power amplifier network. On the other hand, the present application can eliminate the virtual gate of the power amplifier through a first driving voltage with a higher voltage value, so that the power amplifier can reach the target working state under the drive of the second driving voltage, thereby solving the performance deterioration problem of the power amplifier and improving the communication reliability.

[0063] In one embodiment, the power amplifier system further includes a capacitor unit, which is connected to the control terminal of the power amplifier, thereby providing a bias voltage for the control terminal of the power amplifier. When the power amplifier is in an off state, the capacitor unit can release the electric energy stored in itself; when the power amplifier is in an operating state, the capacitor unit can be charged by a driving voltage. In one embodiment, the capacitor unit may include one or more capacitors, each of which is connected to the control terminal of the power amplifier. Furthermore, one end of any capacitor is connected to the control terminal of the power amplifier, and the other end is used for grounding.

[0064] When the control device outputs the first driving voltage, the capacitor unit can be charged by the first driving voltage, and the charging voltage of the capacitor unit gradually increases over time. When the charging voltage reaches the power amplifier working bias voltage, the control terminal voltage of the power amplifier also reaches the power amplifier working bias voltage, and the power amplifier enters the target working state. The control device can make the power amplifier continue to work in the target working state by outputting the second driving voltage to the power amplifier.

[0065] It can be understood that the duration of the first driving voltage is the time it takes for the capacitor unit to charge from the initial voltage to the power amplifier working bias voltage, which is related to the charging speed of the capacitor unit. Therefore, the duration of the first driving voltage can be determined based on factors such as the signal waveform of the first driving voltage, the capacitance of the capacitor unit, and the power amplifier working bias voltage.

[0066] In one embodiment, the control device may predetermine the duration of the first driving voltage, and thereby determine the switching timing between the first driving voltage and the second driving voltage; or, the control device may detect the control terminal voltage of the power amplifier and / or the output signal of the power amplifier to determine whether the control terminal voltage of the power amplifier reaches the second driving voltage, and thereby determine the switching timing between the first driving voltage and the second driving voltage.

[0067] Since the first driving voltage is greater than the second driving voltage, for capacitor units with equal capacitance, when the charging voltage is the same, the charging time consumed by the first driving voltage is shorter than the charging time consumed by the second driving voltage; when the charging time is the same, the charging voltage after charging with the first driving voltage is greater than the charging voltage after charging with the second driving voltage. Therefore, even if a large-capacitance capacitor is provided in the capacitor unit of the power amplifier system, the control method of the present application can also charge the large-capacitance capacitor to the second driving voltage within the protection time interval. In this way, the limitation that the power amplifier system cannot be provided with a large-capacitance capacitor is solved, thereby improving the linear performance degradation of the power amplifier for non-constant envelope signals and broadband signals, thereby improving the communication performance.

[0068] In one embodiment, the first driving voltage is a constant voltage, that is, the voltage value of the first driving voltage does not change with time, which has the advantage of being easy to implement. Figure 4 , Figure 4 The signal waveform of the control signal output by the control device is shown in FIG. The duration of a TDD cycle is T. In each TDD cycle, the period from 0 to t1 corresponds to the first driving voltage, the period from t1 to t2 corresponds to the second driving voltage Vg1, and the period from t2 to T corresponds to the shutdown voltage Vg2. Figure 4 As shown, during the period from 0 to t1, the voltage value of the first driving voltage remains constant, which is Vg3.

[0069] In one embodiment, the voltage value of the first driving voltage changes with time, that is, when the first driving voltage is greater than the second driving voltage, the voltage value of the first driving voltage can change. In this way, when the voltage value of the first driving voltage fluctuates within a certain range, the power amplifier can still be started quickly, thereby reducing the implementation requirements of the control device.

[0070] In an example, see Figure 5 , Figure 5 The signal waveform of the control voltage output by the control device is shown in FIG. The duration of a TDD cycle is T. In each TDD cycle, the period from 0 to t1 corresponds to the first driving voltage, the period from t1 to t2 corresponds to the second driving voltage Vg1, and the period from t2 to T corresponds to the shutdown voltage Vg2. Figure 5As shown, during the period from 0 to t1, the voltage value of the first driving voltage gradually decreases with time, that is, gradually approaches the second driving voltage Vg1.

[0071] It should be understood that although Figure 2-3 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2-3 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0072] In one embodiment, a power amplifier control device applied to a power amplifier system is provided. The power amplifier control device includes a drive circuit, and the drive circuit is used to connect to a power amplifier in the power amplifier system. The drive circuit is used to output a first drive voltage to the power amplifier when the start-up time arrives, so that the power amplifier enters a working state and works under the drive of the first drive voltage. The drive circuit is also used to output a second drive voltage to the power amplifier when the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, so that the power amplifier works under the drive of the second drive voltage; wherein the first drive voltage is greater than the second drive voltage, and the power amplifier working bias voltage is determined according to the second drive voltage.

[0073] It is understandable that the drive circuit can be implemented by using any circuit structure in the prior art, and this application does not impose any specific restrictions on this, as long as the drive circuit can achieve the above functions. In one example, the drive circuit can be an inductor circuit or a boost circuit of any structure.

[0074] In addition, in addition to the driving circuit, the power amplifier control device may also be provided with more circuit structures / devices, for example, the power amplifier control device may also include a switching control signal generating circuit.

[0075] In this embodiment, when the driving circuit starts the power amplifier, it first drives the power amplifier through the first driving voltage with a larger voltage value, so that the control terminal voltage of the power amplifier can be quickly adjusted to the target driving voltage (i.e., the second driving voltage). When the control terminal voltage of the power amplifier is greater than or equal to the target driving voltage, the driving circuit outputs the target driving voltage to the power amplifier so that the device operates in the target working state and amplifies the signal. In this way, even if the power amplifier operates at the same temperature, the driving voltage output to the power amplifier will change with time to achieve rapid adjustment of the control terminal voltage of the power amplifier. In this way, the startup speed of the power amplifier can be accelerated, and the performance deterioration problem of the power amplifier in the initial startup stage can be solved, thereby improving communication reliability.

[0076] In one embodiment, the driving circuit can be implemented by an addition and subtraction circuit, wherein the addition and subtraction circuit refers to a circuit for implementing addition and / or subtraction. When the operating state, input voltage and / or device parameters of the addition and subtraction circuit change, the voltage value output by the addition and subtraction circuit also changes, so the first driving voltage and the second driving voltage can be output to the power amplifier through the addition and subtraction circuit to speed up the startup speed of the power amplifier. Furthermore, the addition and subtraction circuit can also output a shutdown voltage. In one embodiment, the addition and subtraction circuit can change the operating state, input voltage and / or device parameters of the circuit according to the received switching control signal to change the voltage value of the output voltage.

[0077] It can be understood that the addition and subtraction circuit can be implemented by using any circuit structure in the prior art, and the present application does not impose any specific restrictions on this. It only needs that the addition and subtraction circuit can output the first driving voltage and the second driving voltage respectively. This embodiment uses the addition and subtraction circuit to drive the power amplifier, which has the advantages of being easy to implement, highly controllable and easy to industrialize.

[0078] In one embodiment, Figure 6 As shown, the addition and subtraction circuit includes an operational amplifier U1, an energy storage module 510, a charge and discharge control module 520, a reference voltage output module 530 and a feedback module 540. The first input terminal of the operational amplifier U1 is connected to the energy storage module 510, and the energy storage module 510 is connected to the charge and discharge control module 520. The second input terminal of the operational amplifier U1 is respectively connected to the reference output module and the feedback module 540, and the output terminal of the operational amplifier U1 is connected to the feedback module 540 and is used to connect to the power amplifier.

[0079] Among them, the charge and discharge control module 520 is used to control the charge and discharge state of the energy storage module 510, so that the energy storage module 510 is in one of the following states, thereby adjusting the voltage across the energy storage module 510: (1) charging state, (2) fully charged state, (3) discharging state, (4) fully discharged state. When the voltage of the energy storage module 510 changes, the voltage at the first input terminal of the operational amplifier U1 also changes. When the input voltage changes, the output voltage of the operational amplifier U1 also changes accordingly, so that the first drive voltage and the second drive voltage with different voltage values ​​can be output respectively to achieve rapid startup of the power amplifier.

[0080] It can be understood that the energy storage module 510, the charge and discharge control module 520, the reference voltage output module 530 and the feedback module 540 can all be based on a circuit structure composed of various functional circuits and electronic components in the prior art. The present application does not impose any specific restrictions on this, and it is only necessary that the module can realize the aforementioned functions.

[0081] In one example, if Figure 7 As shown, an addition and subtraction circuit is provided, which is used to control the on and off of the gallium nitride power amplifier. The circuit includes MOS tubes T1 to T2 (2 in total), resistors R1 to R15 (15 in total), capacitors C1 to C4 (4 in total) and operational amplifier U1. The specific connection relationship of each device can be as follows Figure 7 shown.

[0082] Since the GaN power amplifier is a depletion-mode device, its turn-off voltage is a negative voltage. Therefore, the operational amplifier U1 can be powered by a dual power supply, and its negative rail voltage can be the lower limit of the GaN power amplifier's limiting gate voltage plus 1 volt.

[0083] Vg0 is the gate voltage value corresponding to the normal operation of the gallium nitride power amplifier, which can be a preset positive voltage and is compatible with power amplifier systems such as LDMOS (Laterally Diffused Metal Oxide Semiconductor). Vg0 is converted to Vg1 through the inverting circuit formed by the operational amplifier U1. When the resistance value of the resistor R13 is equal to the resistance value of the resistor R1, Vg1 = -Vg0.

[0084] This example uses the example of turning on the GaN power amplifier when the switching control signal SW is at a high level and turning off the GaN power amplifier when the switching control signal SW is at a low level. It can be understood that in addition to the control method shown in this example, other control methods can be changed. Figure 7The circuit structure is shown, so that the gallium nitride power amplifier is turned on when the switching control signal SW is at a low level, and is turned off when the switching control signal SW is at a high level. For example, an inverter can be added to the circuit, and the switching control signal SW is processed by the inverter, and the inverted signal is output to the MOS tube T1 and the MOS tube T2 respectively.

[0085] See also Figure 7 When the switch control signal SW is at a low level, both MOS transistors T1 and T2 are turned off, and capacitor C1 is charged to V by +VCC. C1 ,in,

[0086]

[0087] At this time, the voltage at point A is:

[0088]

[0089] The resistance values ​​of resistors R2, R3, R6, R9, R10, R11 and R13 are adjusted so that:

[0090]

[0091] The voltage at point A is the negative rail voltage of the operational amplifier U1. The specific voltage value of the voltage at point A can be determined according to the type of the operational amplifier U1 and is between -80%*VEE and -VEE. It can be seen that when the switching control signal SW is at a low level, the gallium nitride power amplifier is turned off.

[0092] When the switching control signal SW switches from low level to high level, MOS tube T1 and MOS tube T2 are turned on. When the resistance value of resistor R10 is much larger than the resistance value of resistor R9, and the resistance value of resistor R11 is much larger than the resistance value of resistor R9, capacitor C1 can be regarded as discharging only through resistor R9 and MOS tube T2. At this time, the voltage at point A is:

[0093]

[0094] When the switching control signal SW is at a high level for 4*R9*C1 time, the capacitor C1 is basically discharged, and the voltage at point A is:

[0095] It can be seen that as the switching control signal SW changes between high level and low level, the voltage at point A changes from Vg1+△V→Vg1→Vg2, realizing the start-up-shutdown cycle of the power amplifier. In the process of starting the power amplifier, the voltage at point A changes from Vg1+△V→Vg1, thereby realizing the rapid startup of the power amplifier and optimizing its performance.

[0096] Furthermore, in order to eliminate the rising edge and falling edge process, a pico-farad capacitor C2 can be set between the resistor R1 and the output end of the operational amplifier U1. In addition, the voltage at point A can also be pulled down to the negative power supply -VEE through the resistor R15, thereby ensuring that the voltage at point A is a negative voltage during the power-on and power-off process, thereby preventing the gallium nitride power amplifier from being burned during the power-on and power-off process.

[0097] In one embodiment, Figure 8 As shown, a power amplifier control device is provided, which is applied to a power amplifier system, and the power amplifier system includes a power amplifier. The device includes: a first driving voltage output module and a second driving voltage output module, wherein:

[0098] A first driving voltage output module, used for outputting a first driving voltage to the power amplifier when the start-up time arrives, so that the power amplifier enters a working state and works under the drive of the first driving voltage;

[0099] The second driving voltage output module is used to output the second driving voltage to the power amplifier when the control terminal voltage of the power amplifier reaches the working bias voltage of the power amplifier, so that the power amplifier works under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the working bias voltage of the power amplifier is determined according to the second driving voltage.

[0100] In one embodiment, the power amplifier system further includes a capacitor connected to a control terminal of the power amplifier. The first drive voltage output module is further configured to output a first drive voltage to the power amplifier when the startup time arrives, so as to charge the capacitor through the first drive voltage. The second drive voltage output module is further configured to output a second drive voltage to the power amplifier when the charging voltage of the capacitor reaches the working bias voltage of the power amplifier.

[0101] In one of the embodiments, the power amplifier control device further includes a shutdown voltage output module, and the shutdown voltage output module is used to output a shutdown voltage to the power amplifier when the shutdown time arrives, so as to shut down the power amplifier.

[0102] In one embodiment, the first driving voltage output module is further configured to output a constant first driving voltage.

[0103] In one embodiment, the first driving voltage output module is further configured to output a first driving voltage whose voltage value changes with time.

[0104] For the specific definition of the power amplifier control device, please refer to the definition of the power amplifier control method above, which will not be repeated here. Each module in the above power amplifier control device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0105] In one embodiment, a power amplifier control device is provided, which is applied to a power amplifier system, and the power amplifier system includes a power amplifier 710. The device includes a power amplifier controller 610 for connecting to the power amplifier 710. The power amplifier controller 610 includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the power amplifier 710 control method in any of the above embodiments when executing the computer program.

[0106] It is understood that the power amplifier controller 610 can be implemented by any type and model of controller in the prior art, and this application does not impose any specific restrictions on this. In one embodiment, the power amplifier controller 610 can be a FPGA (Field Programmable Gate Array).

[0107] In this way, the power amplifier 710 control method can be implemented by software control, which reduces the size of the power amplifier control device.

[0108] In one embodiment, the power amplifier control device further includes a digital-to-analog converter 620, which is connected between the power amplifier controller 610 and the power amplifier 710, and is used to receive a digital control signal output by the power amplifier controller 610, and convert the digital control signal into a first driving voltage or a second driving voltage, and output the converted first driving voltage or second driving voltage to the power amplifier 710. In one embodiment, the digital-to-analog converter 620 can also convert the digital control signal into a shutdown voltage, and output the shutdown voltage to the power amplifier 710. In this embodiment, the driving voltage is output by the digital-to-analog converter 620, so that the output voltage requirement of the power amplifier controller 610 can be reduced, and then the device requirement of the power amplifier controller 610 can be reduced, so as to reduce the cost of the power amplifier control device.

[0109] Considering that the conversion rate of some digital-to-analog converters 620 cannot meet the requirements of TDD communication, especially the conversion between the shutdown voltage and the driving voltage cannot be completed within the protection time interval, therefore, in order to ensure the reliability of communication, the power amplifier control device can provide different voltages (such as providing the shutdown voltage and the driving voltage respectively, and / or providing the first driving voltage and the second driving voltage respectively) through different ports / devices / equipment, and realize the connection between different ports / devices / equipment and the power amplifier 710 by controlling the switching state of the switching switch 630. In this way, the requirements for the conversion rate of the digital-to-analog converter 620 can be reduced, thereby reducing the implementation cost of the power amplifier control device.

[0110] Further, considering that the voltage difference between the first driving voltage and the second driving voltage is less than the voltage difference between the second driving voltage and the shutdown voltage, and the voltage difference between the two driving voltages is less than the voltage difference between the first driving voltage and the shutdown voltage, the conversion rate of the digital-to-analog converter 620 from the first driving voltage to the second driving voltage is greater than the conversion rate from the second driving voltage to the shutdown voltage, and is also greater than the conversion rate from the shutdown voltage to the first driving voltage. On this basis, in order to reduce the complexity of implementation and the volume of the device, the power amplifier control device can output the control voltage of the power amplifier 710 through two ports / devices / equipment, one of which outputs the driving voltage (including the first driving voltage and the second driving voltage), and the other outputs the shutdown voltage.

[0111] In one embodiment, see Fig. 9 Different ports of the power amplifier controller 610 output different voltages. The first port of the power amplifier controller 610 outputs a shutdown voltage, and the second port of the power amplifier controller 610 outputs a first driving voltage and a second driving voltage. Fig. 9 As shown, the power amplifier control device further includes a switch 630, the first end of the switch 630 is a fixed end, the second end and the third end of the switch 630 are movable ends, and the first end of the switch 630 can be selectively connected to the second end or the third end of the switch 630. Specifically, the first end of the switch 630 is used to connect the power amplifier 710, the second end of the switch 630 is connected to the first end of the power amplifier controller 610, the third end of the switch 630 is connected to the output end of the digital-to-analog converter 620, and the input end of the digital-to-analog converter 620 is connected to the second end of the power amplifier controller 610. When the first driving voltage or the second driving voltage needs to be output, the switch 630 conducts the connection between the first end of the switch and the third end of the switch; when the shutdown voltage needs to be output, the switch 630 conducts the connection between the first end of the switch and the second end of the switch.

[0112] In one embodiment, see Fig.10, the power amplifier control device also includes a switching switch 630 and a shutdown voltage output circuit 640. The shutdown voltage output circuit 640 refers to a circuit for outputting a shutdown voltage. In one embodiment, the shutdown voltage output circuit 640 may be a voltage source. The power amplifier controller 610 is used to output a first driving voltage and a second driving voltage. The first end of the switching switch 630 is used to connect to the power amplifier 710, the second end of the switching switch 630 is connected to the shutdown voltage output circuit 640, the third end of the switching switch 630 is connected to the output end of the digital-to-analog converter 620, and the input end of the digital-to-analog converter 620 is connected to the power amplifier controller 610. When the first driving voltage or the second driving voltage needs to be output, the switching switch 630 conducts the connection between the first end of the switch and the third end of the switch; when the shutdown voltage needs to be output, the switching switch 630 conducts the connection between the first end of the switch and the second end of the switch.

[0113] In one embodiment, see Fig.11 , provides a power amplification system. The system includes a power amplification device 700 and a power amplifier control device 800 in any of the above embodiments. Among them, the power amplification device 700 includes one or more power amplifiers 710, and the connection structure of each power amplifier 710 can be determined according to the application environment of the system, the amplification requirements and / or the device parameters of the power amplifier 710, etc., and the present application does not impose specific restrictions on this. At the same time, the device type of each power amplifier 710 can also be determined according to actual application requirements, and the present application does not impose specific restrictions on this. In one embodiment, the power amplifier 710 can be a radio frequency power amplifier 710.

[0114] The power amplifier control device 800 is connected to at least one power amplifier 710 and is used to output the first driving voltage or the second driving voltage to the power amplifier 710 connected thereto. The power amplifier 710 is used to amplify the RF signal and output the amplified RF signal when the first driving voltage and the second driving voltage are obtained.

[0115] In this embodiment, when the power amplifier 710 is started, the power amplifier 710 is first driven by a first driving voltage with a larger voltage value, so that the control terminal voltage of the power amplifier 710 can be quickly adjusted to the target driving voltage (i.e., the second driving voltage). When the control terminal voltage of the power amplifier 710 is greater than or equal to the target driving voltage, the target driving voltage is output to the power amplifier 710 so that the device operates in the target working state and amplifies the signal. Under the control mode of the present application, even if the power amplifier 710 operates at the same temperature, the driving voltage output to the power amplifier 710 will change with time to achieve rapid adjustment of the control terminal voltage of the power amplifier 710. In this way, the startup speed of the power amplifier 710 can be accelerated, and the performance deterioration problem of the power amplifier 710 in the just-started stage can be solved, thereby improving communication reliability.

[0116] In one embodiment, Fig.11 As shown, the power amplifier device 700 also includes a first bias network 720. The first bias network 720 is used to apply a bias voltage to the control end of the power amplifier 710. When the power amplifier 710 is a MOS tube, the first bias network 720 can be a gate bias network. Specifically, the first bias network 720 includes a capacitor unit 722, which is respectively connected to the power amplifier control device 800 and the control end of the power amplifier 710, and is used to isolate the radio frequency signal to prevent the radio frequency signal from flowing to the power amplifier control device 800, thereby improving the performance of the power amplifier system.

[0117] In one embodiment, the capacitor unit 722 includes two or more capacitors, and each capacitor is connected in parallel. After the parallel connection, one end of each capacitor is respectively connected to the control end of the power amplifier control device 800 and the power amplifier 710, and the other end is used for grounding. That is, one end of any capacitor is respectively connected to the control end of the power amplifier control device 800 and the power amplifier 710, and the other end of the capacitor is used for grounding.

[0118] The capacitance of any two capacitors in the capacitor unit 722 may be equal or unequal, and the capacitance of each capacitor may be determined based on factors such as the power, bandwidth, frequency of the RF signal, isolation requirements, and / or system performance of the power amplifier device, and the present application does not impose any specific restrictions on this. In this embodiment, the capacitance of at least one capacitor in the capacitor unit 722 is greater than or equal to 0.001 microfarads.

[0119] In one embodiment, the first bias network 720 may further include a λ / 4 microstrip line 724 and a matching resistor R16, one end of the λ / 4 microstrip line 724 is respectively connected to the capacitor unit 722 and the power amplifier control device 800, the other end of the λ / 4 microstrip line 724 is connected to one end of the matching resistor R16, and the other end of the matching resistor R16 is connected to the power amplifier 710.

[0120] In an example, see Fig.12 , Fig.12 The circuit structure diagram of the first bias network 720 is shown. The first bias network 720 includes a λ / 4 microstrip line 724, a matching resistor R16 and a capacitor unit 722, and the capacitor unit 722 includes a capacitor C5, a capacitor C6, a capacitor C7 and a capacitor C8. Among them, the capacitance of the capacitor C5 is greater than or equal to 1 microfarad, the capacitance of the capacitor C6 is 0.1 microfarad, the capacitance of the capacitor C7 is 0.01 microfarad, and the capacitor C8 is a picofarad capacitor. The capacitors C5, C6, C7 and C8 are connected in parallel, and one end of each capacitor is connected to the power amplifier control device 800 and one end of the λ / 4 microstrip line 724 respectively after the parallel connection, and the other end of each capacitor is used for grounding after the parallel connection. The other end of the λ / 4 microstrip line 724 is connected to the power amplifier 710 through the matching resistor R16.

[0121] In this embodiment, by setting a large capacitance in the first bias network 720, the problem of broadband linear degradation caused by the memory effect of the power amplifier can be solved, and the linear performance of the power amplifier system for non-constant envelope signals and broadband signals can be optimized, thereby improving communication reliability. Figure 11-12 , the power amplifier system may also include an input matching network 730, a second bias network 740 and an output matching network 750. Among them, the input matching network 730 is used to perform input matching on the power amplifier 710, the output matching network 750 is used to perform output matching on the power amplifier 710, and the second bias network 740 is used to apply a bias voltage to the drain of the power amplifier 710. It can be understood that the input matching network 730, the second bias network 740 and the output matching network 750 can all be implemented using various types of circuit structures in the prior art, and this application does not impose specific restrictions on this. In this embodiment, by setting the input matching network 730 and the output matching network 750, the stability of the power amplifier system can be improved, and the system efficiency and performance can be improved.

[0122] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0123] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0124] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A power amplifier control method, characterized in that: Applied to a power amplifier system, the power amplifier system includes a power amplifier and a capacitor unit; the capacitor unit includes one or more capacitors, one end of any capacitor is connected to the control end of the power amplifier, and the other end is used for grounding; the power amplifier is a heterojunction transistor; the method includes: When the startup time arrives, outputting a first driving voltage to the power amplifier so that the power amplifier enters a working state and operates under the driving of the first driving voltage; the first driving voltage is used to charge the capacitor unit; When the voltage at the control terminal of the power amplifier reaches the working bias voltage of the power amplifier, a second driving voltage is output to the power amplifier, so that the power amplifier works under the driving of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the working bias voltage of the power amplifier is determined according to the second driving voltage; the working bias voltage of the power amplifier is the sum of the second driving voltage and a preset voltage difference, wherein the preset voltage difference is a positive voltage value; When the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, the step of outputting the second driving voltage to the power amplifier includes: when the charging voltage of the capacitor unit reaches the power amplifier working bias voltage, outputting the second driving voltage to the power amplifier.

2. The power amplifier control method according to claim 1, characterized in that: The method further comprises: When the shutdown time arrives, a shutdown voltage is output to the power amplifier to shut down the power amplifier.

3. The power amplifier control method according to claim 1 or 2, characterized in that: The first driving voltage is a constant voltage; or the first driving voltage varies with time.

4. A power amplifier control device, characterized in that: Applicable to a power amplifier system, the power amplifier system comprises a power amplifier and a capacitor unit; the capacitor unit comprises one or more capacitors, one end of any capacitor is connected to the control end of the power amplifier, and the other end is grounded; the power amplifier is a heterojunction transistor; the device comprises a driving circuit for connecting the power amplifier; The driving circuit is used to output a first driving voltage to the power amplifier when the startup time arrives, so that the power amplifier enters a working state and works under the drive of the first driving voltage; The first driving voltage is used to charge the capacitor unit; the driving circuit is also used to output a second driving voltage to the power amplifier when the voltage at the control terminal of the power amplifier reaches the power amplifier working bias voltage, so that the power amplifier works under the drive of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the power amplifier working bias voltage is determined according to the second driving voltage; the power amplifier working bias voltage is the sum of the second driving voltage and a preset voltage difference, wherein the preset voltage difference is a positive voltage value; The driving circuit is also used to output the second driving voltage to the power amplifier when the control terminal voltage of the power amplifier reaches the power amplifier working bias voltage, including: outputting the second driving voltage to the power amplifier when the charging voltage of the capacitor unit reaches the power amplifier working bias voltage.

5. The power amplifier control device according to claim 4, characterized in that: The driving circuit is an addition and subtraction circuit.

6. The power amplifier control device according to claim 5, characterized in that: The addition and subtraction circuit includes an operational amplifier, an energy storage module, a charge and discharge control module, a reference voltage output module and a feedback module; The first input end of the operational amplifier is connected to the energy storage module, and the energy storage module is connected to the charge and discharge control module; the second input end of the operational amplifier is respectively connected to the reference voltage output module and the feedback module, and the feedback module is connected to the output end of the operational amplifier; the output end of the operational amplifier is used to connect to the power amplifier.

7. A power amplifier control device, characterized in that: Applied to a power amplifier system, the power amplifier system comprises a power amplifier and a capacitor unit; the capacitor unit comprises one or more capacitors, one end of any capacitor is connected to the control end of the power amplifier, and the other end is used for grounding; the power amplifier is a heterojunction transistor; the device comprises: a first driving voltage output module, used for outputting a first driving voltage to the power amplifier when the startup time arrives, so that the power amplifier enters a working state and works under the drive of the first driving voltage; the first driving voltage is used to charge the capacitor unit; A second driving voltage output module, configured to output a second driving voltage to the power amplifier when the voltage at the control terminal of the power amplifier reaches the working bias voltage of the power amplifier, so that the power amplifier operates under the driving of the second driving voltage; wherein the first driving voltage is greater than the second driving voltage, and the working bias voltage of the power amplifier is determined according to the second driving voltage; and the working bias voltage of the power amplifier is the sum of the second driving voltage and a preset voltage difference, wherein the preset voltage difference is a positive voltage value; The second driving voltage output module is used to output the second driving voltage to the power amplifier when the control terminal voltage of the power amplifier reaches the working bias voltage of the power amplifier, comprising: outputting the second driving voltage to the power amplifier when the charging voltage of the capacitor unit reaches the working bias voltage of the power amplifier.

8. A power amplifier control device, characterized in that: Applicable to a power amplification system, the power amplification system comprising a power amplifier; the device comprising a power amplification controller for connecting the power amplifier; The power amplifier controller comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of claims 1 to 3 when executing the computer program.

9. The power amplifier control device according to claim 8, characterized in that: The device also includes a digital-to-analog converter, which is connected between the power amplifier controller and the power amplifier; The power amplifier controller is used to output a digital control signal; The digital-to-analog converter is used to convert the digital control signal into a corresponding driving voltage, and output the converted driving voltage to the power amplifier.

10. The power amplifier control device according to claim 9, characterized in that: The device also includes a switch; The first end of the switching switch is used to connect the power amplifier, the second end of the switching switch is connected to the first end of the power amplifier controller, and the third end of the switching switch is connected to the output end of the digital-to-analog converter; the input end of the digital-to-analog converter is connected to the second end of the power amplifier controller.

11. The power amplifier control device according to claim 9, characterized in that: The device also includes a switching switch and a shutdown voltage output circuit; The first end of the switch is connected to the power amplifier, the second end is connected to the shutdown voltage output circuit, and the third end is connected to the digital-to-analog converter.

12. A power amplification system, characterized in that: The system comprises: The power amplifier control device according to any one of claims 4 to 11; A power amplifying device, wherein the power amplifying device comprises a power amplifier; the power amplifier is connected to the power amplifier control device, and is used to amplify the radio frequency signal under the drive of the first driving voltage or the second driving voltage, and output the amplified radio frequency signal.

13. The power amplification system according to claim 12, characterized in that: The power amplification device further includes a first bias network, wherein the first bias network includes a capacitor unit; The capacitor unit is connected to the power amplifier control device and the power amplifier respectively, and is used to isolate the radio frequency signal.

14. The power amplification system according to claim 13, characterized in that: The capacitor unit includes a plurality of capacitors, wherein the capacitance of at least one of the capacitors is greater than or equal to 0.001 microfarads; One end of any capacitor is connected to the power amplifier control device and the power amplifier respectively, and the other end is grounded.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

Images