42 results about "Amplifier gain" patented technology

Systems and techniques are provided for power amplifier gain error compensation for a Digital Power Amplifier (DPA). In some aspects, a compensation method includes obtaining in-phase (I) and quadrature-phase (Q) components of a baseband sample corresponding to in-phase input amplitude codes and quadrature-phase input amplitude codes. The in-phase input amplitude codes can be distorted based on first gain pre-compensation information corresponding to an in-phase signal branch of the DPA, to generate pre-distorted output amplitude codes of the I component. The quadrature-phase input amplitude codes can be distorted based on second gain pre-compensation information corresponding to a quadrature-phase signal branch of the DPA, to generate pre-distorted output amplitude codes of the Q component. The DPA can be driven using the pre-distorted output amplitude codes of the I and Q components to generate a Radio Frequency (RF) output.

Amplifiers with new circuit topologies for gain shaping and gain control are described herein. An example amplifier circuit with gain control includes a differential transistor pair, a main transistor pair coupled to the differential transistor pair, an auxiliary transistor pair coupled to the differential transistor pair, and a resistive impedance coupled between base terminals of the auxiliary transistor pair. The resistive impedance can include a pair of matched resistors coupled between base terminals of the auxiliary transistor pair. The amplifier can also include a capacitor coupled from a virtual ground node between the pair of matched resistors to ground. The amplifier circuits described herein can present a preferred gain response as compared to other amplifiers, at both midband and peaking frequencies. The amplifier circuits also offer additional options for control of gain at midband frequencies, among other benefits.

Systems and techniques are provided for power amplifier gain error compensation for a Digital Power Amplifier (DPA). In some aspects, a compensation method includes obtaining in-phase (I) and quadrature-phase (Q) components of a baseband sample corresponding to in-phase input amplitude codes and quadrature-phase input amplitude codes. The in-phase input amplitude codes can be distorted based on first gain pre-compensation information corresponding to an in-phase signal branch of the DPA, to generate pre-distorted output amplitude codes of the I component. The quadrature-phase input amplitude codes can be distorted based on second gain pre-compensation information corresponding to a quadrature-phase signal branch of the DPA, to generate pre-distorted output amplitude codes of the Q component. The DPA can be driven using the pre-distorted output amplitude codes of the I and Q components to generate a Radio Frequency (RF) output.

The application belongs to the technical field of radio frequency amplifiers, and specifically discloses a CMOS common-source common-gate radio frequency amplifier with temperature and process deviation compensation, which comprises a bias circuit and an amplification stage circuit; the bias circuit adopts a temperature and process deviation compensation bias circuit; when the ambient temperature changes, the bias circuit can collect the real-time temperature of an amplifying tube and generate a new bias voltage, so that the bias state of the amplification stage circuit is dynamically adjusted, and the fluctuation of the gain and power consumption of the amplifier with the temperature change is reduced; similarly, when the process parameter distribution deviation occurs in different regions of a wafer during the chip manufacturing process, the same chip bias circuit and the amplifying tube region of the amplification stage circuit are the same, the same process deviation is generated, the bias circuit can generate a new bias voltage according to the process deviation, the bias state of the amplification stage circuit is dynamically adjusted, and the fluctuation of the gain and power consumption of the amplifier with the process deviation is reduced. The application is suitable for a low-noise amplifier in a WiFi radio frequency front-end module.

This invention belongs to the field of magnetic material measurement technology, and particularly relates to a power amplifier gain control method and system for magnetic characteristic measurement. The method includes the following steps: calculating the instantaneous rate of change of magnetization impedance at each moment, where the instantaneous rate of change of magnetization impedance is positively correlated with the time derivative of the ratio of output voltage to excitation current; calculating the dynamic load margin at each moment, where the dynamic load margin is negatively correlated with the instantaneous rate of change of magnetization impedance and positively correlated with the difference between the power amplifier's supply rail voltage and output voltage amplitude; determining the gain scaling factor at each moment, where the gain scaling factor is positively correlated with the dynamic load margin and its value ranges between a set upper and lower gain limit; and using the gain scaling factor to adjust the drive voltage command in real time to control the power amplifier's output gain, which can effectively improve the accuracy of power amplifier gain control for magnetic characteristic measurement.

The invention relates to the technical field of radio frequency power amplifiers, and discloses a dynamic calibration control method and system for gain data of a radio frequency power amplifier, and the method comprises the steps: collecting the operation data and impedance real-time change characteristics of the radio frequency power amplifier; mapping the operation data and a preset target output amplitude value to an amplitude temperature gain control strategy of the radio frequency power amplifier to obtain a gain calibration instruction of the radio frequency power amplifier; based on the impedance real-time change characteristics, performing impedance compensation adjustment on the gain calibration instruction to obtain an optimized gain calibration instruction of the radio frequency power amplifier; performing closed-loop feedback control on gain parameters of the radio frequency power amplifier based on the optimized gain calibration instruction to obtain a gain control instruction of the radio frequency power amplifier; based on the gain control instruction, performing control effect evaluation on an output signal of the radio frequency power amplifier to obtain a control deviation index of the radio frequency power amplifier; according to the control deviation index, carrying out adaptive adjustment on an amplitude temperature gain control strategy; according to the invention, the efficiency of dynamic calibration control of the gain data of the radio frequency power amplifier can be improved.

Systems, methods, apparatus, and computer-readable media for power amplifier gain error compensation for a digital power amplifier (DPA) are provided.SOLUTION: A signal compensation method for digitally correcting gain characteristics of a DPA includes obtaining an in-phase (I) component and a quadrature-phase (Q) component of baseband samples corresponding to an in-phase input amplitude code and a quadrature-phase input amplitude code, distorting the in-phase input amplitude code based on first gain predistortion information corresponding to an in-phase signal branch of the DPA to generate an I-component predistorted output amplitude code, distorting the quadrature-phase input amplitude code based on second gain predistortion information corresponding to a quadrature-phase signal branch of the DPA to generate a Q-component predistorted output amplitude code, and the DPA is driven using the I-component and Q-component predistorted output amplitude codes to generate a radio frequency (RF) output.SELECTED DRAWING: Figure 17

The invention discloses a variable gain amplification unit and a dual-mode variable gain amplifier, and relates to the technical field of radio frequency integrated circuits. The variable gain amplifier aims to solve the problem that an existing variable gain amplifier cannot meet existing control requirements. According to the variable gain amplification unit and the dual-mode variable gain amplifier, the reconstruction of the gain change range can be realized by adjusting the bias voltage and the number of the cascaded VGA arrays, and different design requirements are met; in the VGA mode, the gain of the amplifier is controlled by the analog voltage and is continuously adjustable in the gain change range. In the PGA mode, the gain of the amplifier is controlled by a digital signal, and the linearity of gain change is extremely high. The circuit is built based on the VGA units with simple structures, and has the advantages of being easy to implement and low in power consumption.

The present disclosure provides an electromagnetic compatibility method and device based on power amplifier sound effect dynamic adjustment and electronic equipment, which can realize sound effect dynamic adjustment of a vehicle-mounted power amplifier system based on a backhaul signal, reduce electromagnetic interference risk among a backhaul link, a high-speed digital link and a power amplifier output link from a design source, improve the purity of the backhaul signal and the accuracy of sound effect mode recognition, reduce the risk of EMC exceeding caused by changes in power amplifier gain or clock radiation during dynamic adjustment, and thus improve the working stability, reliability and efficiency of passing vehicle-grade electromagnetic compatibility test of the vehicle-mounted power amplifier system in a complex electromagnetic environment.

The invention discloses a fully differential current domain echo cancellation analog front-end circuit and a working method thereof. The circuit comprises a resistor R50toAVDD, a resistor Rhybrid and a local sending current source LS, one end of the resistor R50toAVDD is connected with a chip pin, the other end of the resistor Rhybrid is connected with a power supply positive electrode VDD, the other end of the resistor Rhybrid is connected with one end of an echo cancellation current source LScancel, one end of a fixed pull-down current source Idc and one end of a capacitor ACcoupled, the other end of the capacitor ACcoupled is connected with a recovery resistor Rdc and a gain amplifier Gain, and the other end of the recovery resistor Rdc is connected with a power supply positive electrode VDD. And the resistor Rhybrid and the capacitor ACcoupled are respectively connected in parallel with a signal switch. The method supports three working modes, can adapt to application requirements of different coding modes and different rates, and simplifies BOM management.

An integrated circuit and a PLL circuit including the same are provided. An integrated circuit receiving a control voltage and converting the control voltage into an oscillator control current includes a PAR circuit outputting a compensation current compensating for at least one of process variation, power voltage variation, and temperature variation of the integrated circuit, an amplifier including a first power terminal receiving a power voltage, a second power terminal outputting an amplifier current determining a gain of the amplifier, an inverting input terminal receiving the control voltage, and a non-inverting input terminal receiving an amplifier voltage formed based on the gain of the amplifier, and an IDAC circuit converting a reference current generated based on the amplifier voltage into the oscillator control current according to an IDAC code. The PAR circuit outputs the compensation current.

A system for calibrating signals received through a power line within a vehicle includes a signal conditioning circuit that converts analog input signals into digital input signals. In one configuration, the circuit includes an adjustable gain circuit that outputs an amplifier gain signal, establishing an amplifier gain level, and an amplifier that outputs amplified signals in response to the analog input signals and the amplifier gain signal. In another configuration, the circuit includes a bias circuit that outputs a bias signal, establishing a bias level, and a comparator that generates the digital input signals in response to the analog input signals and the bias signal.A controller receives the digital input signals and generates, depending on the mode, one or more control signals configured to control the amplifier gain signal setting and amplifier gain level and / or the bias signal and bias level.

The invention discloses a broadband amplifier circuit with adjustable gain and a tube core protection function, and belongs to the field of broadband amplifiers, a plurality of cascade amplification units are designed based on a Cascode structure, a bias network is formed by adjusting tubes TB, RB1 and RB2, and VDD bias voltage stabilization and tube core overvoltage protection are realized by matching with clamping diodes D1, D2 and D3. And the conduction degree of a T2 tube in the Cascode unit is changed by adjusting the voltage of a specific node VG2, so that the gain of the amplifier is flexibly regulated and controlled. A micro-strip transmission line is adopted for input and output to construct a distributed architecture, signals are injected into an amplification unit through an input matching network and are synthesized and output on an output transmission line after being amplified, and efficient amplification of broadband signals is achieved. The broadband amplifier solves the problems that gain adjustment of a traditional broadband amplifier is limited and a tube core is prone to damage, and has high reliability and practicability in the fields of radio frequency communication, radar detection and the like.

The invention relates to the field of wireless transmission systems, and provides a low-dropout linear voltage stabilizing circuit for a coil switch driver, which comprises a self-biased gm amplifier, a gain stage circuit, an output stage circuit and a feedback stage circuit, the power supply end of the coil switch driver is connected with the input end of the output stage circuit through a charging diode D1; the output end of the output stage circuit is connected with the control end of the output stage circuit through the feedback stage circuit, the self-biased gm amplifier and the gain stage circuit in sequence; an electrical connection point between the output end of the output stage circuit and the feedback stage circuit is connected with a boost end BST; and the boost end BST is also connected with the self-bias gm amplifier and the input end of the gain stage circuit at the same time. The low-dropout linear voltage stabilizing circuit is provided with the self-bias gm amplifier, and compared with a traditional low-dropout linear voltage stabilizing circuit needing reference voltage, the low-dropout linear voltage stabilizing circuit can be directly used in a floating power source domain to achieve accurate output voltage control.

This invention discloses a tunable saddle-shaped spectrum generation device and method, belonging to the field of precision machining. It includes: a pump source, a resonant cavity with overall positive dispersion, a mode-locking device, a dispersion management device, and a spectral adjustment component. The pump source excites a gain fiber to generate laser light. The mode-locking device outputs a mode-locked pulse, and the dispersion management device provides positive dispersion. Working in conjunction with the nonlinear effect of self-phase modulation within the cavity, the mode-locked pulse spectrum is directly shaped into a saddle-shaped spectrum with a central depression. The spectral adjustment component achieves flexible tuning of the center wavelength and bandwidth of the output spectrum by adjusting the relative positions of the diffraction grating and the fiber collimator. This invention actively generates a tunable saddle-shaped spectrum from the source, eliminating the need for complex modulation elements in the amplification link. It allows for precise pre-compensation of the gain characteristics of subsequent amplifiers, effectively suppressing gain narrowing effects. It has the advantages of compact structure, low cost, high stability, and high energy utilization.

The invention discloses an optical power acquisition device and method, and relates to the technical field of optical signal detection. The device comprises a photoelectric detector for converting an optical signal into a current signal, a trans-impedance amplifier for converting the current signal into a pulse voltage signal, a peak value detector for detecting a peak value of the pulse voltage signal, an RC filter network for filtering noise of the pulse voltage signal, and a low-frequency amplifier for amplifying a low-frequency pulse voltage signal, the ADC acquisition module is used for converting the amplified pulse voltage signal into a digital signal; the first feedback network is used for adjusting the gain of the trans-impedance amplifier; the second feedback network is used for adjusting the gain of the low-frequency amplifier; the microcontroller is used for controlling the first feedback network to adjust the gain of the trans-impedance amplifier according to the peak value of the pulse voltage signal and controlling the second feedback network to adjust the gain of the low-frequency amplifier according to the digital signal; according to the invention, the collection precision of the optical power can be improved.

Balanced topology multi-signal duplex synthesis and power amplifier and amplification method based on, belong to communication technical field, include: the two ports of the input side of first stage 90 DEG electric bridge receive a frequency point signal respectively, the two ports of the output side of first stage 90 DEG electric bridge are connected the input end of two power amplifiers of two branches respectively, and the output end of two amplifiers is connected to the two ports of the input side of secondary 90 DEG electric bridge respectively.The present application has the advantages of balanced amplifier power synthesis and high stability, and also has the function of double-band signal duplex synthesis and power amplifier, avoids the problem of amplifier gain decline caused by the insertion loss of duplexer or combiner.Compared with the traditional balanced amplifier, the method realizes duplex synthesis, filtering and power amplification with extremely simple topology, effectively improves the efficiency of the amplifier, and effectively reduces the number of hardware and improves the performance of the amplifier.

The invention discloses a radio frequency power amplifier gain in-band fluctuation equalization circuit and equalization method, and belongs to the technical field of amplifiers. Comprising a power dividing module, the input end of the power dividing module is connected with an input signal, the power dividing module is provided with four output ends, one output end of the power dividing module is connected with the input end of a load, two output ends of the power dividing module are connected with the input end of an equalizer, and the output end of the equalizer is connected with the input end of a second detection module. The three output ends of the power division module are connected with the input end of the first detection module, the output end of the first detection module and the output end of the second detection module are simultaneously connected with the input end of the control processing module, and the output end of the control processing module and the four output ends of the power division module are simultaneously connected with the input end of the voltage-controlled attenuator. And the output end of the voltage-controlled attenuator is connected with the input end of the radio frequency power amplifier. According to the invention, the debugging complexity of the broadband power amplifier equalizer is reduced, the compatibility of the equalizer is improved, batch production of the equalizer is facilitated, and the production efficiency is improved.

The application discloses a kind of wideband amplifier circuits with gain adjustable and with die protection function, belong to wideband amplifier field, based on Cascode structure design multiple cascade amplification units, by adjusting tube TB and RB1, RB2 Bias network is formed, cooperate D1, D2, D3 Zener diode, realize VDD bias voltage stability and die overvoltage protection.Adjusting specific node VG2 Voltage changes T2 in Cascode unit The degree of conduction of tube, realize amplifier gain flexible control.Input and output are constructed by microstrip transmission line Distribution architecture, signal is injected into amplification unit through input matching network, and the output is synthesized after amplification in output transmission line, and high-efficiency amplification of wideband signal is achieved.The application solves the gain adjustment limitation of traditional wideband amplifier and the problem of easy damage of die, and has high reliability and practicality in the field of radio frequency communication, radar detection and the like.

This invention relates to the field of wireless transmission systems and provides a low-dropout linear regulator circuit for a coil switch driver, comprising a self-biased gm amplifier, a gain stage circuit, an output stage circuit, and a feedback stage circuit. The power supply terminal of the coil switch driver is connected to the input terminal of the output stage circuit via a charging diode D1. The output terminal of the output stage circuit is connected to the control terminal of the output stage circuit via the feedback stage circuit, the self-biased gm amplifier, and the gain stage circuit in sequence. The electrical connection point between the output terminal of the output stage circuit and the feedback stage circuit is connected to a boost terminal BST. The boost terminal BST is also connected to the input terminals of the self-biased gm amplifier and the gain stage circuit. This invention's low-dropout linear regulator circuit, with its self-biased gm amplifier, can be directly used in a floating power domain to achieve precise output voltage control, compared to traditional low-dropout linear regulator circuits that require a reference voltage.

Amplifier circuit with programmable gain, featuring the following: at least one device pin (208A) designed to be coupled to an external gain adjustment resistor component (RG); a resistor component chain (202) comprising several resistor components (206A-206H); a comparator chain (204) with several comparator circuits (U1-U8), wherein the several comparator circuits (U1-U8) have the following: first inputs, which are coupled in such a way that they receive voltages generated by corresponding components of the multiple resistors; and second inputs that are coupled in such a way that they receive a voltage applied to at least one device pin (208A); a logic circuit (210) with multiple inputs coupled to corresponding outputs of the multiple comparator circuits (U1-U8); and an amplifier component that is adjustable by the logic circuit (210) based on outputs of the multiple comparator circuits (U1-U8), wherein the logic circuit (210) is configured to adjust the gain of the amplifier component based on a comparison between the voltages from the resistor component chain (202) and the voltage applied to the at least one device pin (208A).

The invention relates to a brake-by-wire brake disc temperature acquisition system and method. The system comprises a thermocouple, a differential amplification module, a cold junction compensation module and a buffer circuit module. The cold junction compensation module is a standard amplifier, and the gain multiple of the standard amplifier is the ratio of the unit scale value of the thermocouple to the drift value of the thermocouple; a common K-type thermocouple can generate drift of 40.6 [mu] V / C, and a standard reading scale is 10mV / C. Therefore, the cold junction compensation module with the standard gain multiple of 10mV / 40.6 mu V is arranged, so that the drift of 40.6 mu V / C generated by the cold junction compensation module is converted into standard 10mV / C; when the output of the cold junction compensation module is the temperature difference between the environment temperature and the standard 0 DEG C, namely the cold end temperature of the thermocouple, a 10mV / C calibration voltage is provided; the temperature of the thermocouple can be collected and compensated, so that the temperature calculation error of the brake disc is reduced, and the real-time detection performance is improved.

To provide a power amplifier circuit capable of appropriately compensating a gain change of an amplifier when a temperature rises.SOLUTION: A first transistor including a collector or a drain to which power is supplied from a second terminal, an emitter or a source that supplies a bias to the amplifier through a first resistance element, and a base or a gate connected to a control terminal, a first diode including an anode connected to the control terminal and a cathode, and a second diode including an anode connected to the cathode of the first diode and a cathode connected to a ground; A second transistor having a collector or a drain connected to the first terminal through a second resistive element, a base or a gate, and an emitter or a source connected to the anode of the second diode, and a constant voltage generation circuit configured to supply a constant voltage to the base or the gate of the second transistor.SELECTED DRAWING: Figure 1

The application discloses a kind of radio frequency power amplifier gain in-band fluctuation equalization circuit and equalization method, belong to amplifier technical field.It includes power division module, the input end of power division module is connected input signal, power division module has four-way output end, the input end of load is connected to the one-way output end of power division module, the input end of equalizer is connected to the two-way output end of power division module, the input end of second detection module is connected to the output end of equalizer, the input end of first detection module is connected to the three-way output end of power division module, the output end of first detection module, the output end of second detection module simultaneously connects the input end of control processing unit, the input end of voltage-controlled attenuator is simultaneously connected to the output end of control processing unit, four-way output end of power division module, the input end of radio frequency power amplifier is connected to the output end of voltage-controlled attenuator.The application reduces the compatibility of wideband power amplifier equalizer debugging complexity, it is easy to equalizer batch production, improves production efficiency.

The invention provides a signal acquisition circuit which is characterized in that the cathode of a photodiode is connected to a given bias voltage, and the anode of the photodiode is connected to a noise gain compensation module, the input end of a bias compensation module and one end of a multi-stage gain switching module; the first output end of the bias compensation module is connected to the inverted input end of the trans-impedance amplifier, the in-phase input end of the trans-impedance amplifier is connected to the second output end of the bias compensation module, and the other end of the multi-stage gain switching module is connected to the output end of the trans-impedance amplifier. And the noise gain compensation module and the multi-stage gain switching module are also connected with a gain switching signal, and the multi-stage gain switching module realizes the gain switching of the transimpedance amplifier. According to the invention, low-current signals output by the photodiode can be processed, so that the circuit has a high-dynamic-range signal acquisition capability, and the bias compensation module further reduces signal bias, increases the magnifiable factor in a limited acquisition voltage range, and improves the signal acquisition quality.

The invention discloses an optical fiber amplifier link connection loss online estimation method based on reflection characteristic monitoring, which comprises the following steps of: segmenting a reflection peak position and extracting peak amplitude, peak width, leading edge slope, trailing edge slope and peak back scattering baseline difference to obtain a connection point reflection peak shape characteristic group so as to refine connection point reflection characterization; the resolution capability of connection loss identification is improved; by constructing a gain distribution parameter group and correcting a connection point reflection peak shape feature group, the superposition influence of amplifier gain disturbance on reflection features is weakened, and the estimation stability in an in-service link is improved; by establishing a non-monotonic constraint relationship between the connection loss and the return loss, the candidate loss range is narrowed, and the misjudgment probability under different connection types and end face states is reduced; and through connection point position correlation check and adjacent moment consistency comparison, target connection loss value convergence is completed, and continuity and credibility of an online estimation result are improved.

The embodiment of the invention provides a signal enhancement method and device, and the method comprises the steps: obtaining the communication information of an automatic driving vehicle and a related base station, and determining an initial gain model based on the communication information; performing power amplifier gain adjustment on the target automatic driving vehicle based on the initial gain model in the driving process of the target automatic driving vehicle, and obtaining updated communication information of the target automatic driving vehicle in at least one area; wherein the target autonomous vehicle is any one of the autonomous vehicles; and training the initial gain model based on the updated communication information, determining an updated gain model, and adjusting the gain of a power amplifier of the target autonomous vehicle based on the updated gain model, thereby enhancing the uplink coverage of the cellular communication network in the strip mine area. The problems of uplink coverage and capacity caused by uplink and downlink imbalance of a cellular communication network in an open-pit mine area application scene are reduced, the site construction requirements are reduced, and the network construction cost is reduced.

The application discloses a power amplifier gain adjusting method and electronic equipment, and relates to the field of electronic equipment, and is used for adjusting the gain of the PA of the loudspeaker when the electronic equipment changes between the horizontal screen state and the vertical screen state. The power amplifier gain adjusting method is applied to the electronic equipment, the electronic equipment comprises a gravity sensor, a plurality of power amplifiers PA and a plurality of loudspeakers, the plurality of PA are used for driving the plurality of loudspeakers, and the plurality of loudspeakers are asymmetrically distributed in the electronic equipment. The method comprises the following steps: acquiring the angle of the electronic equipment through the gravity sensor; if the angle of the electronic equipment indicates that the electronic equipment changes between the horizontal screen state and the vertical screen state, the gain of a target PA is changed, the gain of the target PA is used for adjusting the volume of the loudspeaker driven by the target PA, and the target PA refers to at least one PA in the plurality of PA.

The invention belongs to the technical field of magnetic material measurement, and particularly relates to a power amplifier gain control method and system for magnetic characteristic measurement. The method comprises the following steps: calculating the instantaneous magnetization impedance change rate at each moment, wherein the instantaneous magnetization impedance change rate is positively correlated with the time derivative of the ratio of the output voltage to the exciting current; the dynamic bearing margins at all moments are calculated, and the dynamic bearing margins are in negative correlation with the instantaneous magnetization impedance change rate and are in positive correlation with the difference value of the power supply rail voltage and the output voltage amplitude of the power amplifier; a gain scaling factor at each moment is determined, the gain scaling factor is in positive correlation with the dynamic bearing margin, and the value range is between a set gain upper limit and a set gain lower limit; the driving voltage instruction is adjusted in real time by using the gain scaling factor to control the output gain of the power amplifier, so that the gain control accuracy of the power amplifier for magnetic characteristic measurement can be effectively improved.

The present application relates to a kind of DLP nonlinear correction method, device, equipment and medium of radio frequency power supply system, including according to the working mode information of radio frequency power supply system obtained, determine whether radio frequency power supply system is in amplitude modulation mode;In the case where radio frequency power supply system is in amplitude modulation mode, the expected output power value currently selected by radio frequency power supply system is acquired;According to the expected output power value currently selected, the coefficient table corresponding to the power level where the expected output power value is located is inquired, and the target value of output amplitude coefficient is obtained, wherein the coefficient table corresponding to different power levels is stored by different bit width The corresponding relationship of the value of expected output power value and output amplitude coefficient is used to compatible DAC attenuation and DDS source amplitude modulation output in radio frequency power supply system;According to the target value of output amplitude coefficient, power amplifier gain and signal link attenuation sum, the target expected output power value of radio frequency power supply system is determined.