661 results about "Feedback circuits" patented technology

According to the driving control circuit for the electrostatic chuck power supply and the electrostatic chuck power supply, the driving control circuit is arranged in the electrostatic chuck power supply, a high-voltage output voltage signal of a high-voltage amplifying circuit can be obtained through a signal generating and processing feedback circuit, and according to a negative feedback adjusting mechanism, the driving control circuit is used for driving the electrostatic chuck power supply. A power supply waveform control signal for controlling a high-voltage amplification circuit to output a high-voltage output voltage signal is adjusted, and the high-voltage output voltage signal output by the high-voltage amplification circuit is adjusted to be output, so that the effect of controlling the signal precision of the high-voltage output voltage signal output by the electrostatic chuck power supply is achieved, and the output stability of the electrostatic chuck power supply is improved. Therefore, the stability of an electrostatic field generated by the electrostatic chuck is guaranteed, and the wafer fixing process precision of the electrostatic chuck is ensured.

The invention discloses an electric energy discharge control device. The energy storage circuit is used for storing potential storage electric energy; the bleeder circuit is used for releasing the potential storage electric energy through a bleeder resistor and a bleeder transistor which are connected in series; the reference voltage setting circuit is used for outputting a reference voltage signal; the bleeder sampling feedback circuit is used for outputting a bleeder sampling feedback electric signal according to the bleeder sampling current of the bleeder resistor; the post-stage voltage feedback circuit is used for outputting a post-stage voltage feedback electric signal according to the potential storage voltage; and the conduction degree of the discharge transistor is controlled according to the post-stage voltage feedback electric signal, the reference voltage signal and the discharge current collection feedback electric signal. The conduction degree of the bleeder transistor is dynamically controlled according to the bleeder current collection feedback electric signal and the post-stage voltage feedback electric signal, so that the change of potential storage electric energy of the energy storage device is dynamically adapted, the bleeder power and the current of the bleeder circuit are stable and controllable, and a higher bleeder rate can be realized under the condition that the bleeder power and the current are kept unchanged.

The invention provides a low-noise amplification circuit, a radio frequency front-end module and an electronic terminal.The low-noise amplification circuit comprises an input matching adjustment circuit, a common-source amplification circuit, a first inductor, an inter-stage feedback circuit, a common-gate amplification circuit, an input and output feedback circuit, an output matching adjustment circuit and an output attenuation circuit; the common-source amplification circuit comprises at least two first signal amplification units; each first signal amplification unit comprises a first field effect transistor; the common-gate amplification circuit comprises at least two second signal amplification units; and each second signal amplification unit comprises a second field effect transistor. According to the low-noise amplification circuit, transconductance nonlinearity of devices under different bias signals can be mutually counteracted, so that the linearity fluctuation of the low-noise amplification circuit at different temperatures is optimized, and the linearity of the low-noise amplification circuit is kept basically not to change along with the temperature change.

The invention provides a level shifter and a memory device including the same. The level shifter includes: a medium voltage output circuit configured to output a medium voltage based on an input voltage stepped between a first voltage level and a second voltage level; a feedback circuit configured to output a feedback voltage and an output voltage stepped between a positive target voltage level and a negative target voltage level based on the positive target voltage, the negative target voltage, and the medium voltage; a pull-up voltage control circuit configured to output the first voltage or the positive target voltage to the medium voltage output circuit based on the feedback voltage; and a pull-down voltage control circuit configured to output the second voltage or the negative target voltage to the medium voltage output circuit based on the feedback voltage.

The invention provides a charge pump circuit and a chip, in the charge pump circuit, a sampling circuit, a feedback circuit and a clock generation circuit are sequentially coupled and are coupled with a first charge pump and a second charge pump to form a loop, and in the initial stage of establishing the output of the charge pump circuit, the sampling circuit is used for carrying out primary charging on the output end of the charge pump circuit; when the input voltage rises to a corresponding value, the first charge pump and the second charge pump work at the same time, and when the voltage of the output end of the charge pump circuit reaches a target value, one of the first charge pump and the second charge pump stops working, so that the power consumption of the charge pump circuit in a steady state is effectively reduced; sectional charging and self-adaptive adjustment of a working mode are realized, and the vast majority of charging processes in an output establishment stage are completed by using an input voltage, so that the load pressure in the charge pump circuit is reduced. In addition, the sampling circuit also realizes parallel voltage sampling and ripple sampling, and the transient response capability of the charge pump circuit is enhanced.

The invention belongs to the technical field of aircraft control system design, and particularly relates to a dual-redundancy steering engine controller switching control method, switching control is achieved through three FPGA logic processing modules including an FPGA 1, an FPGA 2 and an FPGA 3, the FPGA 1 controls main and standby control boards, the FPGA 2 controls three main driving boards, the FPGA 3 controls three standby driving boards, and the situation that overall work is abnormal due to the fact that one device breaks down is avoided. And the full duplex 422 bus and the CAN bus are used for feeding back the control current and voltage, the power current and voltage, the temperature signal, the position signal and the overcurrent signal acquired by the signal feedback circuit. The main drive control circuit and the standby drive control circuit share states and check each other through dual-computer communication 422, and can detect each other and automatically switch when a fault occurs in a certain redundancy.

Provided is a buffer circuit that can realize a wide dynamic range, a reduced area, and a reduced power consumption amount while maintaining low output impedance. The buffer circuit includes a first transistor, a current source, a second transistor, an output terminal, and first and second capacitors. The first transistor has a gate to which an input signal is input. The current source is connected to one terminal of the first transistor. The second transistor is connected to the other terminal of the first transistor. The output terminal is connected to the one terminal or the other terminal of the first transistor. The first and second capacitors are between the current source and the gate of the second transistor. The first transistor, the second transistor, and the first capacitor form a first feedback circuit. The first transistor, the current source, and the second capacitor form a second feedback circuit.

The invention discloses a high-side driving circuit and a vehicle body controller. The high-side driving circuit relates to the field of vehicle body controllers, and solves the problem that the existing high-side driving circuit cannot meet the requirements of low cost and high reliability. The switching circuit adopts a combined structure of switching tubes and is connected in series between a power supply and a load, and more stable on-off control is realized through cooperation of multiple tubes; the starting threshold circuit responds to an external control signal only when the load impedance meets a preset threshold value, and large-current load driving in the starting stage or forced starting during load abnormity is carried out. The over-current threshold circuit is connected in series with a driving loop of the switching circuit and provides constant over-current turn-off. A voltage negative feedback circuit is introduced into the voltage and potential stabilizing module to realize self-turn-off and keep a turn-off state when overcurrent and short circuit occur, and self-recovery is realized after a fault disappears without depending on logic judgment of an external control unit. The port protection module absorbs the instantaneous high voltage and the surge current. Through the characteristics, the current-carrying capability of the triode is improved, and the application range of the triode switching circuit is widened.

The invention relates to a trigger unit. The trigger unit comprises a first comparison feedback circuit, a first clock gating circuit, a master latch and a slave latch assembly, the first comparison feedback circuit is used for detecting a signal hopping state of an external input signal according to a first output signal output by the output end of the main latch, and generating a corresponding first state feedback signal, so that the first clock gating circuit generates a corresponding first gating clock signal according to the first state feedback signal and a reference clock signal, and sends the first gating clock signal to the second clock gating circuit; under the condition that the first gating clock signal is valid, the main latch is controlled to update the first output signal according to the external input signal; the state switching opportunity of the main latch can be accurately controlled, and unnecessary clock flipping in the trigger and transistor switching activity caused by the unnecessary clock flipping are effectively reduced, so that dynamic power consumption related to a clock network and dynamic power consumption generated by flipping of nodes in a data path are effectively reduced.

The invention discloses a test system and a test method. The test system comprises a control circuit, a detection circuit, a control unit, a feedback circuit, a test fixture structure, a test thimble and a placement table, a to-be-tested functional circuit board is placed on the placement table, the test fixture structure is used for fixing the to-be-tested functional circuit board, and the relative positions of test pins and test ejector pins of the to-be-tested functional circuit board are fixed; the control unit is connected with the control circuit, and the control unit is used for controlling the control circuit to be communicated with the burning ejector pin and the output end of an external burner in a power-on state and starting a burning action; the detection circuit is respectively connected with the function ejector pin of the test ejector pin and the control unit and is used for performing communication detection on the to-be-tested function circuit board after the control circuit stops acting; and the feedback circuit is connected with the control unit and is used for representing the detection result of the to-be-detected functional circuit board according to the detection signal provided by the control unit. The test efficiency of the functional circuit board is improved, and the complexity of the test process and the test cost are reduced.

The invention discloses a quantum tunneling effect-based random number generation method and system, the system comprises a composite entropy source module, a self-adaptive bias control module, a self-adaptive post-processing module and an output module, the composite entropy source module connects two types of physical effect entropy sources in parallel, and utilizes the noise characteristic complementation of the two types of physical effect entropy sources to improve the entropy value of an original random sequence, so that the random number generation efficiency is improved. The self-adaptive bias control module monitors two kinds of noise output in real time through a double-channel feedback circuit. According to the quantum random number generator, the composite entropy source is combined with the self-adaptive algorithm, so that the quantum random number generator with higher stability and high speed is realized. The method is high in technical maturity, and has a good application prospect in the information security fields such as electric power Internet of Things and mobile terminals.

A switching regulator has a switching power stage circuit having a power switch coupled between an input terminal and a switch node, an output filter coupled between the switch node and an output terminal, and a feedback circuit. The power switch is controlled based on a feedback signal indicative of an output voltage. The output filter comprises a first filtering inductor, a second filtering inductor coupled in series between the switch node and the output terminal, and a first compensation network placed between the first filtering inductor and the second filtering inductor to alter the frequency response of the output filter. The feedback circuit is coupled to the output terminal to provide the feedback signal based on the output voltage.

The utility model relates to a sine wave excitation circuit for a magnetic flux type current sensor. The device comprises a square wave generator used for generating a square wave signal; the resonant oscillator is connected with the square wave generator, at least generates sine wave signals of fundamental frequency based on the square wave signals generated by the square wave generator and loads the generated sine wave signals to the magnetic core, and the frequency of the fundamental frequency is consistent with the frequency of the square wave signals; the excitation signal sampling feedback circuit is connected with the square-wave generator and is adaptively connected with the magnetic core, so that a magnetic core excitation signal adaptively connected with the magnetic core is sampled and then transmitted to the square-wave generator, and the excitation signal sampling feedback circuit comprises a signal conditioning circuit and a peak detection circuit. According to the utility model, the magnetic core can be effectively modulated, and the noise is lower.

The audio device comprises a receiver (201) arranged to receive a set of input audio signals. An audio beamformer (101) performs beamforming by combining the outputs of the filters. The feedback circuit (103) comprises a set of matched filters having a complex conjugate frequency response, and the beamforming adapter (105) adapts the filters in response to a comparison of the input audio signal and the feedback audio signal. An adaptation coefficient processor (207) determines decorrelation coefficients for a set of spatial decorrelation filters that generate a decorrelated output signal from an input audio signal, where the decorrelation coefficients are adapted based on the input signal. A set of spatial filters (205, 301, 401) is arranged to apply spatial filtering to the input audio signal or the feedback signal, wherein the set of spatial filters has coefficients determined from the decorrelation coefficients.

The invention discloses a thermionic cathode ionization gauge anode and cathode voltage automatic adjusting circuit, which is characterized in that a cathode stable emission control module emits electrons after a cathode reaches a red hot state, and the electrons move towards the anode under the traction of anode high voltage under a vacuum condition and flow to a cathode stable emission feedback circuit; after the first sampling voltage is compared with a preset voltage, the power of the heating cathode filament is adjusted to adjust emission electrons, and electron emission current is stabilized; and the anode voltage stabilization module adjusts the voltage output of the power supply module through the voltage division sampling circuit and compares the second sampling voltage with the standard voltage, if the anode voltage becomes large or small, the second sampling voltage is adjusted to output voltage through the voltage stabilization circuit, the output voltage is input to the high-frequency transformation primary side of the transformer, then the voltage is accompanied, a voltage loop is formed, and the anode voltage is stabilized. The circuit realizes automatic adjustment of the anode voltage and the cathode voltage of the hot cathode ionization gauge, so that the anode voltage and the cathode voltage are stable, and the vacuum test precision of the hot cathode ionization gauge is improved.

The utility model provides a relay switch control circuit and a relay output type PLC controller, and the relay switch control circuit comprises a relay which comprises a coil, a first contact and a second contact, and the coil is used for controlling the opening and closing of the first contact and the second contact; the load loop power supply input terminal is connected with the first contact and is used for being connected with an external power supply through an external load; the load loop power supply common terminal is connected with the second contact and is used for being connected with an external power supply; the voltage division circuit is connected with the load loop power supply input terminal; the isolation circuit is connected with the load loop power supply common terminal; the feedback circuit is respectively connected with the voltage division circuit and the isolation circuit; the external power supply is an alternating current power supply, the first contact and the second contact are closed, and the signal output end of the feedback circuit outputs a first signal; the external power supply is an alternating current power supply, the first contact and the second contact are disconnected, and the signal output end outputs a second signal. According to the utility model, the reliability of AC control is improved.

The utility model discloses a circuit for reducing standby power consumption, which is used for reducing the standby power consumption of a charger and comprises a voltage sampling circuit, a voltage feedback circuit and a pulse width control circuit, and the voltage sampling circuit is connected between the voltage feedback circuit and the pulse width control circuit. The pulse width control circuit is provided with a pulse width signal receiving end used for being connected with a PWM signal output pin of an MCU of the charger; and the voltage sampling circuit is connected to a reference potential of a controller in the voltage feedback circuit through central nodes of an upper bias resistor and a lower bias resistor of the voltage sampling circuit.

The utility model discloses a large-wattage silicon carbide stand-alone power supply, which comprises an alternating current-direct current conversion circuit, a switch transformation circuit, a transformation output circuit, a direct current voltage conversion circuit, a quick charge control circuit and a voltage feedback circuit, and is characterized in that input alternating current is converted into first direct current through the alternating current-direct current conversion circuit; the switch transformation circuit modulates the first direct current and outputs the first direct current in a transformation manner; the transformation output circuit carries out rectification and voltage stabilization on the output power supply and then outputs second direct current; the direct-current voltage conversion circuit converts the second direct current into third direct current; the quick charge control circuit is used for carrying out voltage regulation control and output control on the third direct current; the voltage feedback circuit outputs a feedback voltage to the switch transformation circuit under the control of the fast charge control circuit, and the switch transformation circuit performs transformation regulation and control output according to the feedback voltage. Therefore, a high-power power supply can be output to supply power to electronic equipment, and the silicon carbide switch tube is adopted as a voltage transformation modulation switch tube, so that the size of the power supply circuit can be reduced, and application requirements are met.

A passive and active compatible IO (input / output) feedback circuit belongs to the technical field of circuit design and comprises a first-stage signal input interface circuit, a second-stage passive and active signal switching circuit and a third-stage signal feedback circuit. The first-stage signal input interface circuit, the second-stage passive and active signal switching circuit and the third-stage signal feedback circuit are connected in sequence, and the first-stage signal input interface circuit is connected with the third-stage signal feedback circuit. The system can process passive signals and active signals, reduces the technical improvement cost, shortens the technical improvement time of a wind field, simplifies the management process, and is simple in application.

A power conversion circuit includes a transformer, a resonant capacitor, a high-side transistor, a low-side transistor, a current detection circuit, a feedback circuit, and a control circuit. The transformer includes a primary coil connected with the resonant capacitor in series. The high-side transistor and the low-side transistor are coupled to the primary coil. The current detection circuit detects a resonant current flowing through the resonant capacitor to generate a current detection signal. The feedback signal generates a feedback signal based on the output voltage of the power conversion circuit. The control circuit integrates a superposition signal of the current detection signal and a slope compensation signal to generate a first integrated signal, integrates the feedback signal to generate a second integrated signal, and compares the first integrated signal to the second integrated signal to drive the high-side transistor and the low-side transistor.

The invention discloses a wide-voltage output power supply circuit. The circuit comprises a control chip; a field effect circuit; a transformer; the field effect circuit is electrically connected with the secondary side filtering and rectifying circuit through the transformer, and the secondary side filtering and rectifying circuit is electrically connected with the common mode inductor; the circuit further comprises a voltage stabilizing circuit, a reference chip, a first advanced feedback circuit, a second advanced feedback circuit and at least one output voltage feedback circuit, the voltage stabilizing circuit and the reference chip are electrically connected with the control chip through an optocoupler switch, and the first advanced feedback circuit is connected with the voltage stabilizing circuit and the reference chip in parallel. The second advanced feedback circuit and the output voltage feedback circuit are connected in parallel and then are connected in series with the voltage stabilizing circuit, the reference chip and the first advanced feedback circuit. According to the invention, a single power supply can adapt to application scene requirements of different output voltages, the stability and reliability of the circuit can be improved through voltage feedback regulation, the voltage regulation range is enlarged, the operation is flexible and convenient, and the service life is prolonged.

The application provides a GaN amplitude-phase control multifunctional chip and a phased array system, and belongs to the technical field of microelectronics. The GaN amplitude-phase control multifunctional chip comprises an input port, an output port, a distributed current multiplexing amplifier, a phase shifter, a first DC blocking capacitor and a second DC blocking capacitor; the distributed current multiplexing amplifier comprises a first switch tube, a second switch tube, a first gate voltage supply circuit, a DC self-bias circuit, a negative feedback circuit, a first choke filter circuit, a second gate voltage supply circuit, a second choke filter circuit and a voltage source. The application is based on the above-mentioned components and the connection relationship between the components, so that the push stage amplifier in the GaN amplitude-phase control multifunctional chip adopts a distributed current multiplexing structure, thereby reducing the power consumption of the push stage amplifier, improving the efficiency of the GaN amplitude-phase control multifunctional chip, and enabling the GaN amplitude-phase control multifunctional chip to realize high efficiency under the condition of small size and high power.

Certain aspects of the present disclosure generally relate to power supply circuits and techniques for load voltage drop compensation. An example power supply circuit generally includes: a power stage coupled between the power stage and an output node of the power supply circuit; a feedback circuit coupled to the output node of the power supply circuit and including a feedback node; a level-shifter circuit including an input coupled to the feedback node; and a first current source coupled between the level-shifter circuit and a node of the feedback circuit.

A fully differential amplifier is provided, comprising one or more stages and a class AB output stage. The one or more stages amplify a differential pair of input signals to produce an amplified differential pair of signals, and the class AB output stage further amplifies the amplified differential pair of signals to produce a differential pair of output signals. The class AB output stage includes a pair of differential outputs. For each of the differential outputs, the class AB output stage includes a folded network of transistors and a feedback circuit. Transistors in the folded network form a control amplifier for regulating the control inputs of the output pair, and the feedback circuit controls this control amplifier. The folded network biases a pair of output transistors in class AB.

The invention relates to the technical field of signal processing, and discloses a multi-sensor signal fusion circuit which is characterized in that a signal input conditioning circuit amplifies and conditions input signals of multiple paths of sensors respectively, can realize standardized processing according to output characteristics of different sensors, and lays a foundation for subsequent precise fusion; the operational amplifier isolation feedback circuit feeds back a fusion signal of the parallel output circuit to the signal input conditioning circuit through forming a voltage follower, so that the inherent error of a one-way conduction characteristic element in the parallel output circuit can be effectively counteracted, and meanwhile, the influence of temperature drift on the signal precision is avoided; a final fusion signal is determined only by a sensor input signal and conditioning circuit parameters, the fusion precision is greatly improved, and the problem that a traditional simulation fusion scheme is insufficient in precision is solved.

The application provides a single-point detection device and method for a safe working area of a power MOSFET, and relates to the technical field of semiconductor device testing. The single-point detection device comprises a pulse trigger circuit, a sampling feedback circuit, a driving amplification circuit, a capacitor energy storage circuit and a data collector. The pulse trigger circuit is used for outputting a pulse signal with a preset width according to a conduction time corresponding to a specific test point. The sampling feedback circuit is used for collecting a drain current of the power MOSFET and generating a feedback signal. The driving amplification circuit drives the power MOSFET to be turned on or turned off according to the feedback signal and the pulse signal. The capacitor energy storage circuit provides a target drain-source voltage for the power MOSFET according to a drain-source voltage corresponding to the specific test point. The data collector records waveforms of the drain-source voltage and the drain current of the power MOSFET. The single-point detection device does not need to increase an additional circuit, parameter matching is realized by adjusting devices in the single-point detection device, the test efficiency is improved, and the single-point detection device has the advantages of high efficiency, flexibility, high precision and the like.

A power MOSFET driver circuit includes a feedback circuit configured to supply a feedback signal that signals when a gate voltage of the power MOSFET crosses a plateau value and the power MOSFET switches conduction state. The feedback circuit includes a comparator with a replica MOSFET of the power MOSFET, with scaled down dimensions, whose gate is coupled to the gate electrode of the power MOSFET. A bistable circuit has an input coupled to an output of the replica MOSFET and is configured to change a logic state of the feedback signal following the transition of the switching signal when the gate voltage of the power MOSFET crosses the plateau value and the power MOSFET switches conduction state.

In a magnetic field detection device capable of detecting a weak magnetic field without using a shield room, the number of components is reduced, and the circuit structure is simplified. A magnetic field detection device (1) includes: a cancellation coil (C2) wound around a winding core portion (13) of a bobbin (10); magnetic sensors (S1, S21-S24) fixed to mutually different positions of the bobbin (10); and a feedback circuit (31) that cancels an ambient magnetic field of a cancellation space by causing a cancellation current to flow through the cancellation coil (C2) in accordance with an output signal of the magnetic sensor (S1). The magnetic sensors (S21-S24) are disposed within the cancellation space. In this way, a common cancellation coil (C2) is used for the magnetic sensors (S1, S21-S24), so the number of components can be reduced, and the circuit structure can be simplified.

The utility model relates to a multipath adjustable DC stabilized power supply comprising a control module and at least two DC output channels, and each DC output channel comprises a DC converter, a feedback resistor, a variable resistor and a differential analog-to-digital converter. The power input end of the direct-current converter is connected with a direct-current signal source; the power output end of the direct-current converter is connected with the input end of the load electric appliance; the feedback resistor and the variable resistor are connected in series to form an output feedback circuit, a first end of the output feedback circuit is connected with a power output end of the direct-current converter, a second end of the output feedback circuit is grounded, and one end, connected with the feedback resistor, of the variable resistor is connected with a feedback input end of the direct-current converter. The control module is connected with the control input end of the variable resistor; the input end of the differential analog-to-digital converter is connected with a load electric appliance, and the output end of the differential analog-to-digital converter is connected with the control module. The utility model can accurately obtain the voltage at the power utilization end and adjust the output voltage, thereby ensuring the voltage at the power utilization end to be stable and accurate.