A multi-parameter configurable saturated power amplifier modulation circuit, system and method

Abstract

The application discloses a kind of multi-parameter configurable saturated power amplifier modulation circuit, system and method, it is related to radar communication technical field, including: D / A conversion module, D / A conversion module is used to output voltage;Subtraction / multiplication operation amplification circuit, the input of subtraction / multiplication operation amplification circuit is connected with the output of D / A conversion module;Operational amplifier circuit, the inverting input of subtraction / multiplication operation amplification circuit is connected with the output of operational amplifier circuit;Switch protection circuit, the output of subtraction / multiplication operation amplification circuit is connected with the common port of switch protection circuit;Pulse modulation circuit, the input of pulse modulation circuit is connected with the output of switch protection circuit.The application can be modulated according to pulse width, voltage, waveform form, rising rate and falling rate, accurately generates required specific pulse signal, while realizing output waveform diversification, significantly reduces device cost, has outstanding technical and economic value.

Description

Technical Field

[0001] This invention relates to the field of radar communication technology, and in particular to a multi-parameter configurable saturated power amplifier modulation circuit, system, and method. Background Technology

[0002] Intra-pulse modulated saturated power amplifiers have been widely used in radar and various communication systems. The diversity of their output power waveforms (such as pulse waveforms and their rising and falling edge characteristics) has a significant impact on system performance. Therefore, if we can overcome the limitation of traditional saturated power amplifiers that only output conventional waveforms such as sine waves and pulse waves, and achieve arbitrary transformation of the output waveform, it will be of great significance to improving system performance.

[0003] Traditional pulse modulation techniques suffer from the problem of single waveform, only generating pulse waves. Although pulse power amplifiers are widely used in the radar field, they still rely on specific modulators, resulting in high costs. However, with the rapid development of modern military communication systems, the radar's requirements for transmitted signals are constantly upgrading, and single pulse signals can no longer meet its performance requirements. Summary of the Invention

[0004] This invention proposes a multi-parameter configurable saturated power amplifier modulation circuit, system, and method to solve the problems of single waveform and high cost in existing pulse modulation technology.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] This invention discloses a multi-parameter configurable saturated power amplifier modulation circuit, comprising:

[0007] D / A conversion module, used for output voltage;

[0008] The subtraction / multiplication operational amplifier circuit has its input terminal connected to the output terminal of the D / A conversion module.

[0009] Operational amplifier circuit, the inverting input terminal of the subtraction / multiplication operational amplifier circuit is connected to the output terminal of the operational amplifier circuit;

[0010] The switch protection circuit has its output terminal connected to the common port of the subtraction / multiplication operational amplifier circuit; the pulse modulation circuit has its output terminal connected to the input terminal of the pulse modulation circuit.

[0011] Furthermore, the operational amplifier circuit includes a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, and a third capacitor. The third resistor and the second capacitor are connected in parallel. One end of the third resistor is connected to the inverting input terminal of the first operational amplifier, and the other end of the third resistor is connected to the output terminal of the first operational amplifier. This connection point is located between the input terminal of the fourth resistor and the output terminal of the first operational amplifier. One end of the fourth resistor is connected to the output terminal of the first operational amplifier, and the other end of the fourth resistor is connected to the inverting input terminal of the subtraction / multiplication operational amplifier circuit. The other end of the fourth resistor is connected to one end of the third capacitor, and the other end of the third capacitor is grounded. One end of the second resistor is connected to the non-inverting input terminal of the first operational amplifier, and the other end serves as a voltage input terminal. The first resistor and the first capacitor are connected in parallel. One end of the first resistor is connected to the non-inverting input terminal of the first operational amplifier, and the other end is grounded.

[0012] Furthermore, the subtraction / multiplication operational amplifier circuit includes a second operational amplifier, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor. The other end of the fourth resistor is connected to the inverting input terminal of the second operational amplifier through the sixth resistor. One end of the fifth resistor is connected to the input terminal of the sixth resistor, and the other end of the fifth resistor is connected to the output terminal of the second operational amplifier. The output terminal of the D / A conversion module is connected to the non-inverting input terminal of the second operational amplifier through the seventh resistor. One end of the eighth resistor is connected to the non-inverting input terminal of the second operational amplifier, and this connection point is located between the output terminal of the seventh resistor and the non-inverting input terminal of the second operational amplifier. The other end of the eighth resistor is grounded.

[0013] Furthermore, the switch protection circuit includes a switch and a ninth resistor, one end of which is connected to the switch and the other end is grounded. The switch is connected to the pulse modulation circuit.

[0014] Furthermore, if there is no negative voltage supply, the switch will switch to the port of the ninth resistor, so that the output of the second operational amplifier is directly connected to ground; if there is a negative voltage supply, the switch will switch to the output port of the second operational amplifier.

[0015] Furthermore, the pulse modulation circuit includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a third operational amplifier, and a transistor. One end of the eleventh resistor is connected to the output terminal of the transistor, and the other end of the eleventh resistor is connected to the non-inverting input terminal of the third operational amplifier. One end of the twelfth resistor is connected to the inverting input terminal of the third operational amplifier, and the other end of the twelfth resistor is connected to the output terminal of the third operational amplifier. One end of the tenth resistor is connected to the inverting input terminal of the third operational amplifier, and this connection point is located between the inverting input terminal of the third operational amplifier and one end of the twelfth resistor. The other end of the tenth resistor is grounded. One end of the thirteenth resistor is connected to the output terminal of the third operational amplifier, and the other end of the thirteenth resistor is connected to the transistor.

[0016] Furthermore, the D / A circuit includes a data register, a phase accumulator, and a D / A converter. The data register is used to store the controller from the microprocessor, the phase accumulator is used to determine the range and accuracy of the output signal frequency, and the D / A converter is used to generate the required analog signal and the required waveform.

[0017] Furthermore, the formula for the output voltage Vout of the second operational amplifier is (R5=R8, R6=R7):

[0018] ;

[0019] Where Vout is the output voltage of the second operational amplifier, V1 is the adjustable voltage, i.e., the output voltage of the operational amplifier circuit, V2 is the output voltage of the D / A converter, which can be adjusted according to the output voltage of the D / A converter, R5 is the fifth resistor, and R6 is the sixth resistor.

[0020] The present invention also provides a multi-parameter configurable saturated power amplifier modulation system, comprising:

[0021] A driver amplifier is used to receive radio frequency signals from the control terminal.

[0022] A multi-parameter configurable saturated power amplifier modulation circuit, wherein the multi-parameter configurable saturated power amplifier modulation circuit is the aforementioned multi-parameter configurable saturated power amplifier modulation circuit;

[0023] In a power amplifier, the output of the pulse modulation circuit in the multi-parameter configurable saturable power amplifier modulation circuit is connected to the input of the power amplifier, and the output of the driver amplifier is connected to the input of the power amplifier.

[0024] The present invention also provides a method for modulating a multi-parameter configurable saturated power amplifier, comprising:

[0025] Determine whether the radio frequency signal emitted by the control terminal is a continuous radio frequency signal or a pulse-modulated radio frequency signal;

[0026] When the radio frequency signal sent by the control terminal is a continuous radio frequency signal, the output waveform of the power amplifier is determined by the power supply waveform of the multi-parameter configurable saturable power amplifier modulation circuit.

[0027] When the radio frequency signal sent by the control terminal is a pulse-modulated radio frequency signal, the output waveform of the power amplifier is determined by the power supply waveform of the multi-parameter configurable saturable power amplifier modulation circuit and the radio frequency signal.

[0028] The multi-parameter configurable saturated power amplifier modulation circuit is the multi-parameter configurable saturated power amplifier modulation circuit.

[0029] The beneficial effects of this invention are as follows:

[0030] The present invention proposes a multi-parameter configurable saturated power amplifier modulation circuit, system, and method that generates arbitrary waveforms through a D / A module, enabling the power amplifier output waveform to be consistent with the D / A waveform. This intra-pulse amplitude modulation circuit can modulate according to pulse width, voltage, waveform shape, rise rate, and fall rate to accurately generate the required specific pulse signal. It eliminates the need to select a specific modulator, significantly reducing device costs while achieving diversified output waveforms, and possesses outstanding technical and economic value. Attached Figure Description

[0031] Figure 1 The circuit diagram is for the modulation circuit of the multi-parameter configurable saturable power amplifier of this application;

[0032] Figure 2 This is a schematic diagram of the modulation circuit of the multi-parameter configurable saturable power amplifier of this application.

[0033] Figure 3 This is a schematic diagram of the multi-parameter configurable saturated power amplifier modulation system of this application. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the term "connection" and other similar terms should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, a multi-parameter configurable saturated power amplifier modulation circuit includes:

[0041] D / A conversion module, used for output voltage;

[0042] The subtraction / multiplication operational amplifier circuit has its input terminal connected to the output terminal of the D / A conversion module.

[0043] Operational amplifier circuit, the inverting input terminal of the subtraction / multiplication operational amplifier circuit is connected to the output terminal of the operational amplifier circuit;

[0044] The output of the subtraction / multiplication operational amplifier circuit is connected to the common port of the switch protection circuit.

[0045] The output terminal of the pulse modulation circuit and the switch protection circuit are connected to the input terminal of the pulse modulation circuit.

[0046] This invention breaks through the limitations of traditional saturated power amplifier output waveforms, no longer limited to conventional modulation waveforms such as sine waves and pulse waves. This circuit can flexibly generate any customized saturated output waveform, and the rising and falling edges of the waveform can be precisely controlled according to actual application requirements.

[0047] In practical applications, due to the bias voltage of the D / A converter, the reference voltage of the D / A output voltage cannot reach 0V, which will affect the characteristics of subsequent circuits and power amplifier chips. Therefore, adding a subtraction / multiplication operational amplifier circuit can lower the reference voltage of the D / A output voltage to 0V, while the voltage of the inverting input port of the subtraction / multiplication operational amplifier circuit is provided by the operational amplifier circuit. The entire circuit contains two operational amplifier circuits, which ensures the accuracy of the amplification factor.

[0048] In one embodiment, the operational amplifier circuit includes a first operational amplifier U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, and a third capacitor C3. The third resistor R3 is connected in parallel with the second capacitor C2. One end of the third resistor R3 is connected to the inverting input terminal of the first operational amplifier U1, and the other end of the third resistor R3 is connected to the output terminal of the first operational amplifier U1, with this connection point located between the input terminal of the fourth resistor R4 and the output terminal of the first operational amplifier U1. One end of the fourth resistor R4 is connected to the output terminal of the first operational amplifier U1, and the other end of the fourth resistor R4 is connected to the inverting input terminal of the subtraction / multiplication operational amplifier circuit. The other end of the fourth resistor R4 is connected to one end of the third capacitor C3, and the other end of the third capacitor C3 is grounded. One end of the second resistor R2 is connected to the non-inverting input terminal of the first operational amplifier U1, and the other end serves as a voltage input terminal. The first resistor R1 is connected in parallel with the first capacitor C1, and one end of the first resistor R1 is connected to the non-inverting input terminal of the first operational amplifier U1, while the other end is grounded.

[0049] The first operational amplifier U1 can adjust its output voltage V2 by adjusting the ratio of the second resistor R2 to the first resistor R1. V2 is then filtered by the fourth resistor R4 and the third capacitor C3 before being supplied to the inverting input of the subtraction / multiplication operational amplifier circuit.

[0050] In one embodiment, the subtraction / multiplication operational amplifier circuit includes a second operational amplifier U2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. The other end of the fourth resistor R4 is connected to the inverting input of the second operational amplifier U2 via the sixth resistor R6. One end of the fifth resistor R5 is connected to the input of the sixth resistor R6, and the other end of the fifth resistor R5 is connected to the output of the second operational amplifier U2. The output of the D / A conversion module is connected to the non-inverting input of the second operational amplifier U2 via the seventh resistor R7. One end of the eighth resistor R8 is connected to the non-inverting input of the second operational amplifier U2, with this connection point located between the output of the seventh resistor R7 and the non-inverting input of the second operational amplifier U2. The other end of the eighth resistor R8 is grounded. The subtraction / multiplication operational amplifier circuit adjusts the amplification factor by changing the resistance values ​​of the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, and the eighth resistor R8.

[0051] In one embodiment, the switch protection circuit includes a switch, a ninth resistor R9, and a transistor U3. The switch can be switched between the ninth resistor R9 and the transistor U3. One end of the ninth resistor R9 is connected to the switch and the other end is grounded. The transistor U3 is connected to the pulse modulation circuit. The switch protection circuit is used to ensure the power-on timing of the power amplifier.

[0052] In one embodiment, if there is no negative voltage supply, the switch will switch to the port of the ninth resistor R9, so that the output of the second operational amplifier U2 is directly connected to ground; if there is a negative voltage supply, the switch will switch to the transistor U3.

[0053] If VEE is not present, the switch will switch to the port of the ninth resistor R9, directly connecting the output port of the second operational amplifier U2 to ground. If VEE is present, it will be input to the pulse modulation circuit, which will amplify the output voltage waveform of the second operational amplifier U2 again to achieve a voltage that allows the power amplifier to operate normally. After passing through the transistor U5, it will be supplied to the drain of the power amplifier.

[0054] In one embodiment, the pulse modulation circuit includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a third operational amplifier U4, and a transistor U5. One end of the eleventh resistor R11 is connected to the output terminal of the transistor U3, and the other end of the eleventh resistor R11 is connected to the non-inverting input terminal of the third operational amplifier U4. One end of the twelfth resistor R12 is connected to the inverting input terminal of the third operational amplifier U4, and the other end is connected to the output terminal of the third operational amplifier U4. One end of the tenth resistor R10 is connected to the inverting input terminal of the third operational amplifier U4, and this connection point is located between the inverting input terminal of the third operational amplifier U4 and one end of the twelfth resistor R12. The other end of the tenth resistor R10 is grounded. One end of the thirteenth resistor R13 is connected to the output terminal of the third operational amplifier U4, and the other end of the thirteenth resistor R13 is connected to the transistor U5. VD3 is the collector input voltage of the transistor U5, and Vout2 is the output voltage of the transistor U5.

[0055] In one embodiment, the D / A circuit includes a data register, a phase accumulator, and a D / A converter. The data register stores controller data from the microprocessor, and the phase accumulator determines the frequency range and accuracy of the output signal. The D / A converter generates the required analog signal and waveform, which can be modified by software to produce arbitrary waveforms. This waveform is then fed to the positive input port of the operational amplifier. The output voltage waveform of the D / A converter can reach the nanosecond level, exhibiting a fast response speed. The analog signal from the D / A converter can have arbitrary waveforms. Through subtraction / multiplication operational amplifier circuits and operational amplifier circuits, the amplitude and reference of the waveform can be proportionally changed before being fed to the pulse modulation circuit.

[0056] In one embodiment, the output voltage Vout of the second operational amplifier U2 is calculated using the formula (R5=R8, R6=R7):

[0057] ;

[0058] Where Vout is the output voltage of the second operational amplifier U2, V1 is the adjustable voltage, i.e. the voltage output of the operational amplifier circuit, V2 is the output voltage of the D / A converter, which can be adjusted according to the voltage output of the D / A converter, R5 is the fifth resistor, and R6 is the sixth resistor.

[0059] The output waveform of the operational amplifier of this invention is sent to the modulation circuit, processed by the modulation circuit, and then transmitted to the power amplifier. Unlike conventional modulation circuits that only select the pulse width of the input waveform and whose output waveform does not change with the input waveform, the modulation circuit of this invention can dynamically adjust in real time according to the waveform generated by the D / A module and accurately transmit the adjusted waveform to the power amplifier, while ensuring that the waveform is distortion-free.

[0060] In one embodiment, a multi-parameter configurable saturated power amplifier modulation system includes:

[0061] A driver amplifier is used to receive radio frequency signals from the control terminal.

[0062] A multi-parameter configurable saturated power amplifier modulation circuit, wherein the multi-parameter configurable saturated power amplifier modulation circuit is the aforementioned multi-parameter configurable saturated power amplifier modulation circuit;

[0063] In a power amplifier, the output of the pulse modulation circuit in the multi-parameter configurable saturable power amplifier modulation circuit is connected to the input of the power amplifier, and the output of the driver amplifier is connected to the input of the power amplifier.

[0064] like Figure 3 As shown, in one embodiment, a multi-parameter configurable saturated power amplifier modulation method includes:

[0065] Determine whether the radio frequency signal emitted by the control terminal is a continuous radio frequency signal or a pulse-modulated radio frequency signal;

[0066] When the RF signal sent by the control terminal is a continuous RF signal, the output waveform of the power amplifier is determined by the power supply waveform of the multi-parameter configurable saturable power amplifier modulation circuit. Specifically, the RF input signal of the power amplifier is a continuous wave (CW), but its drain power supply circuit adopts a pulse power supply modulation strategy. This modulation method allows the amplifier to amplify the input continuous wave RF signal and output effective power only when the rated operating voltage is applied to the drain. When the drain voltage drops to 0V, the amplifier enters the cutoff state due to the loss of the core operating bias. Even if there is a continuous wave RF excitation input, there is no RF power output. The time-domain waveform characteristics of the final output RF power are completely dominated by the parameters of the drain pulse modulation power supply (such as pulse duty cycle, repetition frequency, rise / fall characteristics, etc.).

[0067] When the RF signal sent by the control terminal is a pulse-modulated RF signal, the output waveform of the power amplifier is determined by the power supply waveform of the multi-parameter configurable saturable power amplifier modulation circuit and the RF signal. Specifically: the RF input signal of the power amplifier is a pulse wave, and the drain power supply also adopts pulse modulation mode; the effective power output of the amplifier must meet the core condition: only when the drain is synchronously applied with the rated operating voltage within the time domain window triggered by the RF pulse input can the amplifier complete the power amplification of the input pulse RF signal and output effective RF power; if the drain voltage is 0V when the RF pulse is input, the amplifier cannot complete the signal amplification due to the lack of bias and has no power output; and under the condition of no RF pulse input, regardless of whether the rated operating voltage is applied to the drain, the amplifier has no RF power output due to the lack of RF excitation signal.

[0068] Therefore, when the control terminal outputs an RF signal, it is necessary to synchronize the timing of the D / A waveform with the RF signal of the control terminal to ensure that the power amplifier is turned on normally. For example, the RF signal output by the control terminal needs to be synchronized with the drain modulation of the power amplifier. Specifically, when the RF signal is input to the power amplifier, its drain needs to be synchronously applied with the rated operating voltage.

[0069] The multi-parameter configurable saturated power amplifier modulation circuit mentioned above is the multi-parameter configurable saturated power amplifier modulation circuit of the present invention.

[0070] The beneficial effects of this invention are as follows: This invention provides a multi-parameter configurable saturated power amplifier modulation circuit. Compared to continuous wave modulation power amplifiers, pulse modulation power amplifiers have higher power and lower power consumption, making them more suitable for radar transmission systems. Compared to traditional pulse modulation power amplifiers, the multi-parameter configurable saturated power amplifier circuit allows for individual adjustment of the pulse width, amplitude, rising edge, and falling edge of the pulse signal, parameters that directly affect the quality of the radar system's transmitted signal. The multi-parameter configurable saturated power amplifier modulation circuit uses conventional components, resulting in low cost, easy procurement, convenient debugging, and greater selectivity in pulse waveforms. It can replace some high-power pulse modulation switch drivers and MOSFETs, reducing the number of components used and saving costs.

[0071] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A modulation circuit for a multi-parameter configurable saturated power amplifier, characterized in that, include: D / A conversion module, used for output voltage; The subtraction / multiplication operational amplifier circuit has its non-inverting input connected to the output of the D / A conversion module. Operational amplifier circuit, the inverting input terminal of the subtraction / multiplication operational amplifier circuit is connected to the output terminal of the operational amplifier circuit; The output of the subtraction / multiplication operational amplifier circuit is connected to the common port of the switch protection circuit. The output terminal of the pulse modulation circuit and the switch protection circuit are connected to the input terminal of the pulse modulation circuit. The operational amplifier circuit includes a first operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, and a third capacitor. The third resistor and the second capacitor are connected in parallel. One end of the third resistor is connected to the inverting input terminal of the first operational amplifier, and the other end of the third resistor is connected to the output terminal of the first operational amplifier. This connection point is located between the input terminal of the fourth resistor and the output terminal of the first operational amplifier. One end of the fourth resistor is connected to the output terminal of the first operational amplifier, and the other end of the fourth resistor is connected to the inverting input terminal of the subtraction / multiplication operational amplifier circuit. The other end of the fourth resistor is connected to one end of the third capacitor, and the other end of the third capacitor is grounded. One end of the second resistor is connected to the non-inverting input terminal of the first operational amplifier, and the other end serves as a voltage input terminal. The first resistor and the first capacitor are connected in parallel. One end of the first resistor is connected to the non-inverting input terminal of the first operational amplifier, and the other end is grounded. The subtraction / multiplication operational amplifier circuit includes a second operational amplifier, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor. The other end of the fourth resistor is connected to the inverting input of the second operational amplifier through the sixth resistor. One end of the fifth resistor is connected to the input of the sixth resistor, and the other end of the fifth resistor is connected to the output of the second operational amplifier. The output of the D / A conversion module is connected to the non-inverting input of the second operational amplifier through the seventh resistor. One end of the eighth resistor is connected to the non-inverting input of the second operational amplifier, and this connection point is located between the output of the seventh resistor and the non-inverting input of the second operational amplifier. The other end of the eighth resistor is grounded.

2. The multi-parameter configurable saturated power amplifier modulation circuit according to claim 1, characterized in that, The switch protection circuit includes a switch and a ninth resistor. One end of the ninth resistor is connected to the switch and the other end is grounded. The switch is connected to the pulse modulation circuit.

3. The multi-parameter configurable saturated power amplifier modulation circuit according to claim 2, characterized in that, If there is no negative voltage supply, the switch will switch to the port of the ninth resistor, so that the output of the second operational amplifier is directly connected to ground. If there is a negative voltage supply, the switch will switch to the output port of the second operational amplifier.

4. The multi-parameter configurable saturated power amplifier modulation circuit according to claim 2, characterized in that, The pulse modulation circuit includes a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a third operational amplifier, and a transistor. One end of the eleventh resistor is connected to the output terminal of the transistor, and the other end of the eleventh resistor is connected to the non-inverting input terminal of the third operational amplifier. One end of the twelfth resistor is connected to the inverting input terminal of the third operational amplifier, and the other end of the twelfth resistor is connected to the output terminal of the third operational amplifier. One end of the tenth resistor is connected to the inverting input terminal of the third operational amplifier, and this connection point is located between the inverting input terminal of the third operational amplifier and one end of the twelfth resistor. The other end of the tenth resistor is grounded. One end of the thirteenth resistor is connected to the output terminal of the third operational amplifier, and the other end of the thirteenth resistor is connected to the transistor.

5. A multi-parameter configurable saturated power amplifier modulation circuit according to claim 1 or 4, characterized in that, The D / A circuit includes a data register, a phase accumulator, and a D / A converter. The data register is used to store the controller from the microprocessor, the phase accumulator is used to determine the range and accuracy of the output signal frequency, and the D / A converter is used to generate the required analog signal and waveform.

6. The multi-parameter configurable saturated power amplifier modulation circuit according to claim 4, characterized in that, The output voltage of the second operational amplifier The formula is: ； in V1 is the output voltage of the second operational amplifier, V2 is the output voltage of the D / A circuit, and V3 is the output voltage of the D / A circuit. R5 is the fifth resistor, and R6 is the sixth resistor.

7. A multi-parameter configurable saturated power amplifier modulation system, characterized in that, include: A driver amplifier is used to receive radio frequency signals from the control terminal. A multi-parameter configurable saturated power amplifier modulation circuit, wherein the multi-parameter configurable saturated power amplifier modulation circuit is one of the multi-parameter configurable saturated power amplifier modulation circuits according to any one of claims 1-6; In a power amplifier, the output of the pulse modulation circuit in the multi-parameter configurable saturable power amplifier modulation circuit is connected to the input of the power amplifier, and the output of the driver amplifier is connected to the input of the power amplifier.

8. A modulation method for a multi-parameter configurable saturated power amplifier, characterized in that, include: Determine whether the radio frequency signal emitted by the control terminal is a continuous radio frequency signal or a pulse-modulated radio frequency signal; When the radio frequency signal sent by the control terminal is a continuous radio frequency signal, the output waveform of the power amplifier is determined by the power supply waveform of the multi-parameter configurable saturable power amplifier modulation circuit. When the radio frequency signal sent by the control terminal is a pulse-modulated radio frequency signal, the output waveform of the power amplifier is determined by the power supply waveform of the multi-parameter configurable saturable power amplifier modulation circuit and the radio frequency signal. The multi-parameter configurable saturated power amplifier modulation circuit described herein is a multi-parameter configurable saturated power amplifier modulation circuit as described in any one of claims 1-6.

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