204 results about "Frequency compensation" patented technology

The invention relates to the technical field of micro-grid control, and provides an island micro-grid distributed control method, system and device and a storage medium. Comprising the following steps: performing voltage compensation gain and frequency compensation gain calculation based on droop control output of each distributed power generation unit, droop control output of all neighbor distributed power generation units, and a voltage dynamic tracking error and a frequency dynamic tracking error which are obtained by calculating a microgrid global recovery target to obtain secondary adjustment output; and after corresponding items in the droop control output and the secondary regulation output are summed to generate comprehensive reference output, voltage synthesis is carried out according to the comprehensive reference output to obtain voltage regulation output for output control of a corresponding inverter. Based on a distributed regulation and control mechanism for cooperatively calculating the compensation amount of each power generation unit by using neighbor information and a global recovery target, the dynamic response speed and the power distribution precision can be improved, voltage drop and frequency deviation caused by load disturbance are effectively eliminated, and rapid recovery is realized.

The invention discloses a multi-loop anti-interference ride-through control system and method for a high-voltage three-level inverter, and is suitable for a three-phase T-type three-level grid-connected inverter. The system comprises a direct current side power supply circuit, an inversion main circuit, a filtering grid-connected circuit, a signal sampling and conditioning circuit, a multi-loop cooperative controller and a PWM driving and protecting circuit. According to the control method, a robust synchronous reference is provided through an outer ring virtual synchronous generator strategy; a middle ring adopts a virtual impedance model containing a high-frequency compensation item to selectively suppress switching noise; the inner ring adopts a quasi-proportional resonance controller to realize fundamental current zero-static-error tracking; the modulation layer dynamically optimizes a discontinuous pulse width modulation strategy based on a real-time EMI index; and the rings are switched to a low-voltage ride-through mode in cooperation when a fault occurs. On the premise of not increasing hardware, the anti-interference capability, the current quality and the ride-through stability of the inverter under the working conditions of strong electromagnetic interference and power grid drop are effectively improved.

A cascade amplification circuit module based on complementary parameter amplifiers belongs to the technical field of integrated circuit amplifiers and comprises a first-stage complementary parameter amplifier (CPA) and a second-stage amplifier (floating inverting type or transconductance resistance type). The first-stage CPA adopts an NMOS and PMOS complementary structure, passive amplification is achieved through grid multiplexing, a grid capacitor is used for storing signals in the sampling stage, a depletion layer capacitor is switched to improve gain in the amplification stage, common-mode voltage is stabilized through complementary design, and an extra feedback circuit is not needed. And the second-stage amplifier provides driving capability and is combined with passive gain to suppress noise. The cascade structure does not need frequency compensation, the design is simplified, the problem of balancing gain, noise and power consumption of a traditional amplifier is solved, and the cascade amplifier has the advantages of being high in energy efficiency and low in complexity.

The invention discloses a frequency offset estimation method and device, electronic equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: receiving a baseband spread spectrum signal from a low earth orbit satellite to obtain a received signal; performing segmented sweep frequency compensation on the received signal to obtain a compensated measured signal; despreading and descrambling the compensated measured signal by using prior information determined from the received signal, and completing coarse frequency offset estimation on the measured signal despread and descrambled for the first time; and de-spreading and descrambling the signal data after the coarse frequency offset estimation again, and finishing fine frequency offset estimation on the signal data after the second time of de-spreading and descrambling. According to the invention, prior information is introduced to directly lock and track a specified target beam signal, so that the directionality and efficiency of measurement are remarkably improved; by designing a low-complexity signal processing flow, the algorithm burden can be remarkably reduced, it is ensured that adjacent satellite beam frequency offset estimation is rapidly completed in service proceeding, and the real-time requirement of seamless switching is met.

A temperature coefficient of frequency (TCF) compensation layer may be disposed on a second surface of a piezoelectric layer opposite to a first surface to reduce the TCF of a microacoustic filter. The frequency response of a microacoustic filter with the TCF compensation layer on only the second surface of the piezoelectric layer includes spurious modes. In an exemplary microacoustic filter, another TCF compensation layer is disposed on the first surface of the piezoelectric layer between the electrode structure and the piezoelectric layer. Providing TCF compensation layers bilaterally on the first and second surfaces of the piezoelectric layer reduces spurious modes in the frequency response of the microacoustic filter. In some examples, the electrode structure is disposed on a substrate and may be isolated from the TCF compensation layer on the first surface of the piezoelectric layer by an air gap to reduce acoustic losses.

The invention discloses an unmanned aerial vehicle noise elimination method and device for cross-medium direct acoustic communication, and the method comprises the steps: carrying out the sampling of a known detection signal and a receiving signal, obtaining a frequency domain expression, calculating a cross-medium sound pressure transmission function, and extracting amplitude response, phase response and group delay; based on a normalization ratio and local maximum detection method, identifying a center frequency set of unmanned aerial vehicle propeller noise; the notch depth, bandwidth, frequency compensation and phase compensation are determined by combining channel characteristic parameters, and a cascade notch filter is constructed; and inputting the channel characteristic parameters into the deep learning model, outputting a filter parameter correction amount, realizing dynamic updating of the filter, obtaining the filter capable of suppressing noise, and further obtaining a denoised communication signal. According to the invention, precise detection of propeller noise frequency and multi-dimensional adaptive adjustment of filter parameters can be realized.

The invention relates to an IRNSS navigation signal simulation generation method and system based on parameter compensation, and the method comprises the steps: receiving original signal data outputted by an IRNSS navigation receiver, and receiving a target machine position coordinate and a velocity vector; analyzing the navigation message to extract ephemeris parameters, and calculating the real-time position and velocity vector of the satellite; calculating a Doppler frequency compensation value and a pseudo code time delay compensation value; according to the pseudo code time delay compensation value and a preset target simulation coordinate, modifying a signal emission time field in the navigation message, generating a simulation navigation message frame, carrying out forward error correction coding processing, generating a coding symbol sequence, and carrying out modulo-two addition operation on the coding symbol sequence and a pre-generated PRN pseudo code sequence to obtain a baseband spread spectrum signal; generating an intermediate frequency carrier signal according to the Doppler frequency compensation value and the carrier phase; and modulating the baseband spread spectrum signal to the intermediate frequency carrier signal, and outputting an intermediate frequency analog signal. According to the invention, the concealment of signal simulation and the success rate of capturing the analog signal by the target receiver can be improved.

The invention discloses a time synchronization method, a time synchronization system and a storage medium, and the method comprises the steps: receiving and fusing multi-source time signals at the same time, and obtaining a local time reference signal; calculating the frequency compensation amount of a local clock source in real time based on an LSTM model trained by using a local time reference signal; detecting whether the time signal is available, and determining to switch an atomic clock taming mode or a timekeeping mode based on a detection result; inserting a timestamp with femtosecond precision for the initial data message through the PIC to obtain a target data message; and sending the time synchronization information and the target data message to a 6G network node through a precision time protocol of the FPGA chip. According to the invention, on the basis that the satellite signal is taken as a time reference, two conditions that the satellite signal is available and unavailable are considered, and a local clock source and photon time service are adjusted in combination with a multi-source satellite signal fusion result, so that the time synchronization precision is improved, and the 6G network requirement is met.

The application relates to a control communication interface optimization method in semi-physical simulation, in particular to the field of ship gas turbine semi-physical simulation, which effectively improves the timing accuracy and anti-interference of semi-physical simulation control through multi-technology fusion, realizes high-precision error collection by using an atomic clock marker, dynamically optimizes control instructions in combination with an intelligent algorithm, compensates for current transmission delay, prospectively suppresses future disturbance through a neural network, and finally outputs accurate frequency compensation through an adaptive fusion mechanism, thereby realizing signal alignment and closed-loop feedback, and significantly enhancing the stability and response speed of the system under complex working conditions.

This invention relates to the field of precision mechanical control technology, specifically to a method based on a magnetoelectric converter and linearity control. The method includes: acquiring raw magnetic induction data through a magnetoelectric converter; obtaining a three-dimensional magnetic field distribution through electromagnetic field spatial mapping and extracting the axial gradient vector field; constructing a virtual magnetic streamline model based on this to identify local disturbance regions where magnetic field distortion exceeds a threshold; performing multi-scale time-frequency analysis on the data in this region to separate high-frequency fluctuations caused by mechanical vibration and low-frequency drift components caused by thermal deformation; inputting the two components into a cross-coupled compensation decision network to generate high-frequency suppression commands and low-frequency compensation trajectories, which are then merged to form a comprehensive drive signal for compensation. This method can accurately locate the source of linearity disturbance and perform targeted decoupling control of errors from different physical sources, improving control accuracy and stability under complex operating conditions.

The invention discloses an automobile shock absorber capable of synchronously adjusting the frequency compensation buffering strength of a hydraulic cavity, and relates to the technical field of automobile shock absorbers, the automobile shock absorber comprises an upper lifting lug and an ejector pin, an outer protection barrel is arranged on the outer surface of the upper lifting lug, an outer cylinder is slidably mounted in the outer protection barrel, and a magnetorheological piston is slidably arranged in the outer cylinder; and a connecting rod is mounted in the middle of the magnetorheological piston. According to the automobile shock absorber capable of synchronously adjusting the frequency compensation buffering strength of the hydraulic cavity, through the design of the auxiliary assembly, gas can further accelerate airflow due to the fact that the diameters of the built-in grooves are gradually reduced, the heat dissipation effect on the automobile shock absorber can be achieved through acceleration, meanwhile, the multiple sets of built-in grooves are formed, and the automobile shock absorber can be conveniently adapted to airflow in different directions; in addition, through the design of the auxiliary disc, protection can be conducted from the outside of the whole shock absorber, collision of external foreign matter is avoided, the possibility that the outer cylinder is damaged and broken is reduced, meanwhile, the whole auxiliary disc is supported through the design of the connecting supporting column, and deformation caused by stress is avoided.

The invention provides a drift tube linear accelerator on-line frequency compensation method, which comprises the following steps: firstly, constructing an initial cavity three-dimensional simulation model, judging the flatness of an axial field through calculation, and adjusting the angle of an eccentric sheet if the flatness does not reach the standard; calculating the stability of the electric field, and adjusting the length of the coupling rod if the electric field does not reach the standard; the field flatness is judged again after stability tuning, and the angle of the eccentric piece is adjusted if the field flatness does not reach the standard; a tuning block is added according to an opening of the cavity, wherein the tuning block comprises a new pickup port tuner, and a vacuum pump mesh, a fixed tuner and a rod coupler are improved; after a tuning block is added, frequency, axial field flatness and stability calculation is carried out, if the three indexes all meet requirements, compensation is ended, and otherwise, it is considered that compensation cannot be carried out; according to the method, a frequency compensation scheme can be simulated and determined, so that the field flatness and stability meet the operation requirements, and a cold test system is prevented from being rebuilt in a tunnel for field adjustment.

The invention relates to the technical field of integrated circuit design, in particular to a wide-loop broadband and high-frequency PSRR low-voltage linear voltage stabilizing circuit which comprises an error amplifier, two modules with frequency compensation FVF structures and a resistor array. The module of the first frequency compensation FVF structure receives a specific value output by the error amplifier, outputs feedback voltage and is used for increasing the transient response speed of the circuit; and the module of the second frequency compensation FVF structure receives the specific value output by the error amplifier, and outputs the working voltage to the load for improving the load bearing capacity of the circuit. The LDO design of a frequency feedback voltage (FVF) structure is adopted, and the performance of the high-frequency PSRR module is improved by expanding the loop bandwidth and enhancing the high-frequency PSRR module. By adopting the FVF structure, the load bearing capacity of the LDO is remarkably enhanced, and by introducing the high-frequency PSRR lifting circuit, the LDO is endowed with strong anti-interference performance within a specific frequency range.

The invention belongs to the technical field of low-altitude radar antenna gain, and discloses a low-altitude surveillance radar X-band antenna gain estimation method and system, and the method comprises the steps: collecting the phase distribution of a radiation unit, the standing-wave ratio of a feed network and other microscopic parameters, and building a correlation model of the microscopic parameters with a mesoscopic multipath signal and macroscopic scene complexity; a transition area correction factor iterator is introduced, temperature compensation, frequency compensation and a multi-level loss correction process are combined, and errors of temperature drift and frequency deviation of the 10-12 GHz frequency band are counteracted; the accuracy of gain estimation in a complex low-altitude environment is improved; constructing a three-dimensional adaptive matrix of the RCS, the maneuvering acceleration and the target type, and forming a three-dimensional correction system in combination with the environment complexity dimension; in a multi-target scene, computing resources are distributed according to the logic that the smaller the RCS is, the larger the maneuvering acceleration is and the higher the priority is, the targets are processed in batches by adopting a time division multiplexing architecture, and the contradiction between the gain response lag of the X-band antenna and the fast maneuvering of the targets is relieved.

A data transmission device and a method thereof are used for performing data transmission with an external device according to a frequency signal, and the data transmission device comprises a data transmission device, a first transmission rate detection unit, a second transmission rate detection unit and a compensation unit. The data transceiving unit performs data packet transceiving with an external device. The first transmission rate detection unit detects an integer part of a data transmission rate according to a first data packet and a frequency signal. The second transmission rate detection unit detects a decimal part of the data transmission rate according to the second data packet, the integer part and the frequency signal. When the data transmit-receive unit transmits a third data packet to the external device according to the data transmission rate, the compensation unit performs a one-bit frequency compensation operation on the third data packet according to the fractional part.

The invention relates to the technical field of pulse width modulation, and discloses a frequency conversion critical triangular wave pulse width modulation method and device, and the method comprises the steps: obtaining the overlapping conduction time of two lower tubes of a secondary side of a dual-active bridge converter, and enabling the overlapping conduction time to be obtained through current closed-loop control; judging whether the switching period exceeds a preset time threshold value or not according to the overlapped conduction time and the inductor follow current time; and if the switching period exceeds the preset time threshold value, converting the preset time threshold value and the overlapping conduction time into a duty ratio and a frequency, and then carrying out frequency conversion critical triangular wave pulse width modulation on the dual-active bridge converter. According to the technical scheme, the frequency variable can be introduced, so that the inductive current triangular wave stably works in a critical continuous state all the time. The power is improved through the synergistic effect of frequency conversion and peak current increase, and meanwhile, the increment influence of the stage that the inductive current is reduced to 0 on the peak current is counteracted through frequency compensation, so that the turn-off loss at the inductive peak current is greatly reduced, and the heating problem of a system switch tube is effectively relieved.

The present application relates to the technical field of communications, and discloses a signal sending or receiving method, a terminal, and a network side device. The signal sending or receiving method in embodiments of the present application comprises: a network side device uses a first parameter to send a first signal, or uses a second parameter to receive a second signal, wherein the first parameter is used for performing frequency compensation on the first signal, and the second parameter is used for performing frequency compensation on the second signal.

The invention relates to a decision-guided frequency compensation type carrier tracking method and system, and belongs to the field of satellite navigation. According to the method, aiming at the tracking lock losing problem caused by overlarge capture frequency deviation and navigation signal bit hopping in a capture-to-tracking link of a traditional frequency-locked loop, after receiving initial frequency deviation and code phase for delay alignment, down-conversion and coherent integration are carried out on intermediate frequency data based on the initial frequency deviation to obtain two groups of values; a frequency discriminator is used for calculating a first frequency difference, reverse frequency compensation is carried out on the first frequency difference to obtain a second frequency difference, frequency offset is synthesized to form two frequency assumptions, subsequent signals are processed in parallel, and correct frequency offset is output by comparing absolute values of coherent integration results, so that the frequency tracking range is effectively expanded, and the bit hopping interference resistance is enhanced. And the stability and the reliability of the navigation receiver in a high dynamic environment are improved.

The invention belongs to the technical field of temperature detection, and particularly relates to a surface acoustic wave double-frequency compensation and radio frequency activation electrical equipment passive wireless temperature measurement system, which comprises a main controller module, and is characterized in that the main controller module is internally provided with an edge calculation module used for operating an LSTM model, predicting a temperature trend and correcting interference; the multi-mode fusion module is used for fusing multi-sensor data and dynamically correcting temperature readings through environmental parameters; the remote reporting module is used for accelerating edge calculation and ensuring that a high-temperature event signal is preferentially uploaded in combination with an LPWAN protocol; and the decision linkage module is used for optimizing linkage of the condensed aerosol fire extinguishing device and preferentially processing a high-risk area based on real-time data. According to the invention, a temperature rise trend prediction system with response time less than 5 seconds can be constructed, high precision and low delay of temperature reading in a complex environment can be realized, the uploading efficiency of high-temperature alarm information is optimized, and the response speed of a high-risk area is improved.

The application discloses a detection synchronization and demodulation design method based on a high-speed burst communication system, comprising the following steps: S1, performing fast acquisition on a burst synchronization sequence in a high-speed QPSK and OQPSK satellite communication system; S2, after the matching flag of the synchronization sequence in S1 is valid, performing M&M frequency offset estimation on current on-the-fly complex signal data and a preset synchronization sequence, generating a corresponding carrier compensation value by using the calculated frequency difference value, and outputting the frequency-compensated on-the-fly complex signal; S3, performing phase estimation on the frequency-compensated on-the-fly signal and the preset synchronization sequence, generating a corresponding phase compensation value by using the calculated phase difference value, and outputting the frequency-phase-compensated on-the-fly signal; and S4, after the frequency-phase compensation is completed, the on-the-fly complex signal is sent into a small-bandwidth synchronization tracking loop to generate a compensation value, a constellation diagram is output, and a symbol hard decision is performed on the loop output to output a synchronization code stream. The application meets the requirements of low bit error rate and missed detection and false detection rate, and provides good demodulation performance.

The embodiment of the invention discloses a low-power-consumption high-precision digital temperature compensation frequency control chip and method, and relates to the technical field of integrated circuits, the low-power-consumption high-precision digital temperature compensation frequency control chip comprises a temperature sensing and quantification module, a digital compensation control module and a crystal oscillator module; the digital compensation control module is respectively coupled with the temperature sensing and quantifying module and the crystal oscillator module, and the crystal oscillator module and the digital compensation control module form closed-loop connection; the crystal oscillator module comprises a quartz crystal resonator, a driving circuit and a variable capacitor array, the variable capacitor array is connected to an oscillation circuit of the crystal oscillator module, and the driving circuit is a stacked phase inverter. And meanwhile, the precision is improved from a full link of temperature acquisition, frequency compensation and oscillation control, and a digital temperature compensation frequency control chip of a high-capacity lookup table is not needed.

A high-speed, high-power gallium-nitride-based (GaN-based) operational amplifier (“opamp”) and a GaN-based high-power, wideband linear amplitude modulator (LAM) that may be used to implement a dynamic power supply (DPS) in a high-power, wideband polar modulator are disclosed. The high-speed, high-power GaN-based opamp comprises an input differential amplifier having an input-DC-offset-minimizing circuit and a class AB push-pull output stage including an efficiency-enhancing source follower control circuit that provides for a unique and modified form of buffered frequency compensation. The GaN-based high-power, wideband LAM comprises an input differential amplifier having an input-DC-offset-minimizing circuit, similar to that used in the GaN-based opamp, and a current boost circuit that maintains a source follower in an output stage of the LAM in saturation during times the LAM's output voltage is low.

The invention provides a harmonic compensation method for a distributed active filtering system, and relates to the technical field of power distribution networks, and the method comprises the steps: obtaining load data and distributed power data of a power distribution network, and building a power distribution network Norton equivalent model based on a Norton equivalent circuit; pCC harmonic voltage is detected, harmonic responsibility coefficients of all feeder lines are calculated in combination with a Norton equivalent model of the power distribution network, and a harmonic responsibility quantification result is obtained; obtaining harmonic compensation capacity based on the harmonic responsibility quantification result, and dynamically adjusting virtual impedance through droop control to generate basic compensation current; based on the basic compensation current, the compensation capacity of each frequency is adjusted through a frequency division distribution algorithm; a compensation task is autonomously distributed in proportion through multiple inverters according to the adjusted compensation capacity of each frequency; according to the invention, the harmonic source is accurately positioned to optimize the compensation resource allocation, and the stability of the system is significantly improved through the autonomous cooperation of multiple devices.

The invention relates to the technical field of sound field control, in particular to a sound equipment sound field low-frequency increasing and decreasing method and system based on volume amplitude recognition, and the method comprises the following steps: collecting an original audio stream, and extracting instantaneous amplitude features; calculating a low-frequency compensation coefficient according to the nonlinear auditory model; constructing a dynamic safety threshold and correcting a coefficient in combination with the physical limit of the equipment; and adjusting the low-frequency component based on the corrected parameter, and generating an optimized sound field signal. According to the invention, by establishing a dynamic mapping and constraint mechanism between the instantaneous volume amplitude and the low-frequency gain, the technical defects that the low-frequency hearing feeling of a traditional sound system is deficient under the low volume and overload distortion is extremely easy to occur under the high volume are thoroughly solved, and under the premise of strictly guaranteeing the physical safe operation of loudspeaker hardware, the sound quality is greatly improved. And full-dynamic-range sound field adaptive equalization and restoration conforming to human ear psychological acoustic characteristics are realized.

This invention relates to the technical field of sound field optimization, and provides a method and system for optimizing sound field parameters. The method includes: activating a vibration sensing device; driving a loudspeaker to play a test signal to excite the loudspeaker enclosure to vibrate, and driving the vibration sensing device to collect vibration data of the loudspeaker enclosure; receiving the vibration data and performing frequency domain analysis to identify the structural resonant frequency and structural resonant intensity; storing the structural resonant frequency and structural resonant intensity as structural resonant information; determining a preliminary low-frequency compensation scheme based on the room's acoustic characteristics; comparing the preliminary low-frequency compensation scheme with the structural resonant information to determine whether the preliminary low-frequency compensation scheme poses a risk of exciting structural resonance in the loudspeaker enclosure, obtaining an excitation risk assessment result; and adjusting and updating the preliminary low-frequency compensation scheme based on the excitation risk assessment result to obtain a sound field parameter optimization scheme. This invention improves the sound field stability and listening experience of stereo systems.

The application discloses a coaxial cavity electrically tunable filter and belongs to the technical field of wireless communication. The coaxial cavity electrically tunable filter comprises an input-output coupling structure, a transmission structure, a frequency compensation device and a coupling compensation device; a cavity mainly comprises resonant cavities and a coupling structure; the resonant cavities are arranged in a linear array mode, and adjacent resonant cavities are communicated through the coupling structure; the top of each resonant cavity is provided with a choke structure, and the bottom of each resonant cavity is provided with a frequency compensation hole; the outer wall of the resonant cavities at the two ends of the linear array is provided with an input-output structure; the input-output coupling structure mainly comprises a coupling plate, a coupling ring and a radio frequency plug; the coupling ring is arranged on one side of the coupling plate, and the radio frequency plug is arranged on the other side of the coupling plate; and the coupling ring is located in the input-output structure. The frequency tuning column of the application reduces frictional resistance in the frequency adjustment process and improves the reliability of the electrically tunable filter.

The application discloses a low-dropout voltage regulator. The low-dropout voltage regulator comprises a differential amplifier circuit, a self-stabilized second-stage amplifier circuit, an output circuit and a frequency compensation circuit. The differential amplifier circuit is electrically connected with the self-stabilized second-stage amplifier circuit. The self-stabilized second-stage amplifier circuit is electrically connected with the output circuit. The frequency compensation circuit is arranged between an output end of the self-stabilized second-stage amplifier circuit, a second end of an output switch component of the output circuit and a third end of the output switch component of the output circuit.

The present application relates to a resonator and an electronic device. A high and low acoustic impedance alternating layer, a bottom temperature coefficient of frequency compensation layer, a bottom electrode layer, a piezoelectric layer, a top electrode layer and a top temperature coefficient of frequency compensation layer are sequentially stacked on a substrate by using a specific microfabrication process, to form a new resonator. The resonator can simultaneously show excellent characteristics of low loss, wide bandwidth, low temperature sensitivity and a small size through the special stack geometry, thereby having better operation reliability.

This invention discloses a method and apparatus for noise-resistant frequency compensation of seismic data, relating to the fields of compressed sensing and seismic exploration design. The method includes: performing spectral analysis on the original seismic data to determine the expected frequency broadening range; performing autocorrelation calculation on the original seismic data to obtain wavelet-like waveform data; using the wavelet-like waveform data as simulated wavelet data, inputting iterative solutions to the compressed sensing noise-resistant frequency extension basis function to obtain the full bandwidth reflection coefficient; concatenating the full bandwidth spectrum with the original seismic data spectrum to obtain the extended spectrum; and performing an inverse Fourier transform on the extended spectrum to obtain the noise-resistant frequency extension data. This invention is based on the compressed sensing framework, utilizes the Shearlet denoising basis function to constrain the frequency extension basis function, and constructs a noise-resistant frequency extension basis function based on compressed sensing, achieving good high- and low-frequency compensation effects for seismic data under low signal-to-noise ratio conditions.

The invention provides a signal processing circuit and a receiver, and relates to the technical field of signal processing.The signal processing circuit comprises a signal input interface, a signal processing unit, a signal conversion unit and a signal output interface which are sequentially connected; the signal processing unit comprises a low-frequency extraction unit, a main amplification unit and a signal merging unit, the low-frequency extraction unit and the main amplification unit are arranged in parallel, input ends of the low-frequency extraction unit and the main amplification unit are connected with the signal input interface, and output ends of the low-frequency extraction unit and the main amplification unit are connected with the signal merging unit; according to the signal processing circuit and the receiver provided by the invention, the low-frequency extraction unit and the main amplification unit are arranged in parallel, so that synchronous processing of the main amplification unit and the low-frequency extraction unit is realized to obtain the synthesized signal, a signal with high-frequency compensation and low-frequency gain recovery can be formed, and an output signal with better jitter performance is obtained after signal conversion; the stability of a post-stage processing circuit can be remarkably improved, and the bit error rate of a receiver is further reduced.