49 results about "Digital feedback" patented technology

The invention relates to the technical field of data processing, and discloses a digital feedback dynamic adjustment method and system for a neutron generator control signal, and the method comprises the steps: calling a reconfigurable waveform parameter set corresponding to a target neutron from a mapping relation according to the yield and beam spot characteristic demands of the target neutron; generating a basic high-frequency pulse sequence of the neutron tube, and performing pre-distortion filtering on the basic high-frequency pulse sequence to obtain a high-frequency pulse sequence of the neutron tube; collecting an anode current and a target voltage signal of the neutron tube applied with the high-frequency pulse sequence during operation, and converting the anode current and the target voltage signal into a digital feedback current; comparing the digital feedback flow with a reference waveform in the reconfigurable waveform parameter set in real time to obtain an error correction amount of the high-frequency pulse sequence; dynamically adjusting the high-frequency pulse sequence according to the error correction; applying the dynamically adjusted high-frequency pulse sequence to a corresponding electrode in a neutron tube through power; the neutron tube control signal processing efficiency can be improved.

The invention relates to the technical field of high-voltage VI modules, and particularly discloses a high-voltage VI source module for SOC testing, which comprises an output stage module, a sampling module and a control and conversion module, the output stage module is constructed by adopting discrete high-voltage power devices, supports four-quadrant operation, and can realize flexible output and absorption of voltage and current; the sampling module is composed of a voltage sampling unit and a current sampling unit which respectively monitor voltage and current signals of the output stage in real time. The control and conversion module comprises a control unit and a digital-to-analog conversion unit; the digital-to-analog conversion unit is responsible for converting a digital control signal into an analog control signal to drive the output stage and converting analog voltage and current signals collected by the sampling module into digital feedback signals; and the control unit receives the digital feedback signals and adjusts the output of the digital-to-analog conversion unit in real time through a closed-loop control algorithm, so that high-precision and high-stability control on the output-stage voltage or current is realized.

A wireless communication device and a method for IQ calibration are provided. The wireless communication device includes a transmitting unit configured to generate a set of radio frequency (RF) transmit signals based on a set of digital baseband signals, each RF transmit signal in the set of RF transmit signals having an IQ component; a receiving unit configured to generate a set of digital feedback signals based on a set of RF received signals obtained from the set of RF transmitted signals; and a processing unit configured to obtain a first compensation coefficient set for the transmitting unit and a second compensation coefficient set for the receiving unit based on the digital baseband signal set and the digital feedback signal set by using an IQ calibration model, the IQ calibration model includes a first set of higher order terms associated with non-linear errors in the transmitting unit and a second set of higher order terms associated with non-linear errors in the receiving unit.

The invention relates to the technical field of charging scheduling, in particular to an intelligent port scheduling method and system for a charging pile cluster, and the method comprises the steps: obtaining the setting data of each charging pile of the discretely-deployed charging cluster, so as to construct a digital feedback model of the charging cluster, monitoring the load characteristics of each charging pile at the current moment, and carrying out the monitoring of the load characteristics of each charging pile; the method comprises the following steps: acquiring the real-time load characteristics of a charging cluster, substituting the real-time load characteristics into a digital feedback model to generate the real-time load characteristics of the charging cluster, acquiring the environment characteristics of the area where each charging pile is located, predicting the predicted load characteristics of the charging cluster in the future time by combining the environment characteristics and the real-time load characteristics, and performing port scheduling decision on the real-time load characteristics and the predicted load characteristics based on the digital feedback model. And performing port resource allocation on each charging pile according to a generated port scheduling strategy.

The present invention is in the field of underlying electronic circuits, in particular audio amplifiers, more particularly class D amplifiers, such as for digital audio converters and digital amplifier controllers, chips comprising said audio amplifiers, and devices comprising said audio amplifiers or said chips.

The present application discloses a vehicle-mounted adaptive microphone audio gain method, apparatus, equipment and storage medium, relating to the technical field of vehicle-mounted electronic equipment. The present application includes: determining a business scenario of an application, determining a target digital gain value and a target analog gain value of the received microphone audio according to the business scenario, performing analog gain on the microphone audio to obtain an analog gain value, performing digital gain on the microphone audio to obtain a digital gain value, comparing the analog gain value with the target analog gain value and the digital gain value with the target digital gain value, respectively, to obtain an analog feedback gain value and a digital feedback gain value, and gaining the microphone audio according to the analog feedback gain value and the digital feedback gain value to obtain microphone gain audio, which can enhance the sensitivity of the microphone and facilitate adaptive adjustment of the required microphone audio gain for various applications on the vehicle system.

A high-voltage (HV) power supply device outputs an output voltage based on a control signal generated by dual analog / digital feedback loops. The control signal is determined at least in part by an error amplifier that receives a measurement signal attenuated proportionally to the output voltage and an output signal from a digital-to-analog converter (DAC). The ADC also receives the measurement signal and transmits it in digitized form to a digital processor. The digital processor calculates a digital DAC data signal based on the measurement signal and a digital setpoint input signal corresponding to a setpoint voltage value desired to be output from the high-voltage source. The DAC receives the DAC data signal and converts it into a DAC output signal that is transmitted to the error amplifier.

This invention provides a control channel multiplexing and docking method, apparatus, computer equipment, and medium based on a high-speed network, comprising: configuring a logical channel connected to the control system for each test site and dynamically setting IP routing mapping relationships; converting analog feedback signals output by sensors at the first test site into digital feedback signals, encapsulating them, and transmitting them to the test control room via a high-speed real-time network; receiving a first data packet, decapsulating it, converting it into an analog feedback signal, and inputting it to the control system; converting analog control commands issued by the control system into digital control commands, encapsulating them, and transmitting them to the first test site via a high-speed real-time network; decapsulating a second data packet according to its destination IP address, converting it into an analog control command, and outputting it to the actuator; updating the IP routing mapping relationship and switching the logical channel connection when switching test sites. This enables the hardware resources of a control system to be reused.

A radar detection system and a radar field of view (FOV) direction adjustment method are provided. A processing unit of the radar detection system performs the following steps in one scanning round: obtaining at least one cluster of a current frame and a current status and a next status of each cluster based on digital feedback signals; and determining a displacement, determining, based on the current status of a tracked cluster in the at least one cluster and the displacement, whether the tracked cluster is located on an edge of a current FOV of a radar unit, and sending a control signal based on the next status of the tracked cluster in response to the tracked cluster being located on the edge of the current FOV, to adjust an FOV direction of the radar unit.

The present application relates to the technical field of temperature change control, and discloses an intelligent control method and system for a multi-stage temperature change test box, which obtains setting information of a temperature change control network and a temperature sensing network of the test box, divides the internal space of the test box into regions, obtains a corresponding digital feedback model, collects temperature data of the test box through the temperature sensing network, and substitutes the temperature data into the digital feedback model to analyze the temperature distribution information and temperature time-varying characteristics of the internal space of the test box, obtain temperature environment information required by the current test, generate a temperature change control target in combination with the temperature distribution information, the temperature time-varying characteristics, and the temperature environment information, select a temperature control region and analyze a temperature control mode for the temperature change control target based on the digital feedback model, obtain the best temperature control region and the best temperature control strategy, place a test object in the best temperature control region, and drive the temperature change control network to control the temperature according to the best temperature control strategy.

The invention relates to the technical field of radio frequency circuits and quantum sensing, and discloses an NV color center-oriented hybrid neural network adaptive pre-distortion system and method, a storage medium and electronic equipment, and the system comprises a main signal path, a feedback observation path and a hybrid neural network pre-distortion controller; a digital predistorter in the main signal channel receives an original digital signal, predistorts the original digital signal to generate a predistorted signal, and outputs an amplified signal after the predistorted signal passes through a power amplifier; a coupler of the feedback observation path receives an amplified signal, and the amplified signal passes through an attenuator and an analog-to-digital converter and then outputs a digital feedback signal; and the hybrid neural network predistortion controller receives the original digital signal and a digital feedback signal output by the analog-to-digital converter, outputs a calibration signal required by the digital predistorter through a neural network model based on the original digital signal and the digital feedback signal, and controls the digital predistorter based on the calibration signal.

The invention relates to a circuit and a method for generating an oscillator signal. The present disclosure relates to an oscillator circuit comprising: a controller configured to generate a frequency control signal, the frequency control signal comprising a first frequency control value; a digitally controlled oscillator (DCO) configured to generate an oscillator output signal based on the frequency control signal, where the output signal is generated at a first frequency in response to a first frequency control value of the frequency control signal; and a digital feedback circuit configured to receive the output signal and output a first feedback signal, where the oscillator circuit is configured such that the first frequency depends on or is at least partially based on a value of the first feedback signal, and the controller is configured to provide a first control instruction to instruct the digital feedback circuit to update the first feedback signal, the digital feedback circuit is configured to, in response to the first control instruction: measure a first frequency of the output signal; and adjusting a value of the first feedback signal to reduce an error between the first frequency and the first target frequency.

This application relates to defect detection for memory devices. A segmented digital die defect detector can include a plurality of signal lines and control circuitry each coupled with test circuitry to form a path. At least a portion of the path can extend through an interior portion of the die. The test circuitry can generate digital feedback signals indicative of a condition of a respective signal line. The control circuitry can generate a single output signal indicative of the condition of the signal lines. By utilizing digital test circuitry and a single digital output signal, a layout area of the segmented digital die defect detector can be reduced and power consumption associated with test operations can be reduced.

The present application provides a rapid prototyping stamping processing system and method, which relates to the field of stamping processing technology. The method includes: reading the stamping processing task; planning the production strategy based on the task complexity and batch processing threshold, and determining the task stamping strategy; combining the trial punching decision module to perform task-by-task single-frequency trial punching analysis and control decision-making based on the rapid punching machine, and determine the punching machine control strategy; configuring the flexible control system and establishing a communication connection with the CAD library; determining the self-compensation rule based on the control tolerance interval and setting the digital feedback device; combining the flexible control system to perform stamping control of the stamping processing task, synchronously perform stamping monitoring, and perform dynamic stamping self-regulation. This application can solve the technical problem in the prior art that the stamping control effect is unstable, which further affects the product quality, realize the technical goal of flexible adaptive control, and achieve the technical effect of high-quality product output.

The present invention discloses a material parameter digitization method and system for full-cycle management, which relates to the field of digital processing technology, including: determining multiple material management nodes, performing periodic monitoring, and obtaining a full-cycle parameter set of materials; associating and matching multiple material management nodes with multi-stage material parameters to generate a material parameter management network; traversing the material parameter management network to perform digital calculations and generate multiple digital coefficients; performing digital compensation analysis on the material parameter management network and formulating a digital compensation plan; digitally verifying the material parameter management network, performing regular feedback on multiple material management nodes based on the verification results, generating digital feedback information, and performing full-cycle digital management of multi-stage material parameters. The present invention solves the technical problem that the existing technology cannot effectively perform accurate digital management of material parameters, and achieves the technical effect of accurate digital management of material parameters.

The invention belongs to the technical field of atmospheric trace gas detection, and particularly relates to a laser heterodyne radiometer for locking local oscillator optical power based on an adjustable optical attenuator. Comprising a variable optical attenuator and an optical fiber beam splitter, and the optical fiber beam splitter transmits local oscillation light attenuated by the variable optical attenuator to a first photoelectric detector and a frequency calibration module and carries out beam combination and frequency beating on the local oscillation light and signal light; the output end of the first photoelectric detector serves as the input end of the PID controller, a control signal is calculated and sent to the variable optical attenuator, and the frequency calibration module and the signal processing module are jointly and sequentially connected with the acquisition card and the upper computer to output a measurement result. By combining the variable optical attenuator with digital PID feedback control, dynamic and closed-loop locking of local oscillator optical power is realized, an atmospheric absorption spectrum without a slope baseline can be obtained, and the accuracy of measuring the atmospheric gas concentration by the laser heterodyne radiometer is effectively improved.

The application discloses a temperature and vibration decoupling measurement system based on an optical fiber sensor, which comprises an optical circulator for transmitting adjustable detection light to an optical fiber Bragg grating and receiving a reflected light intensity signal; after light splitting through an optical coupler, the reflected light intensity signal is converted into a first electric signal and a second electric signal by two photoelectric detectors; an analog-digital converter carries out analog-digital conversion processing on the second electric signal to obtain a digital feedback electric signal; a field programmable gate array extracts a low-frequency component in the digital feedback electric signal, compares the low-frequency component with a preset target light intensity to obtain a light intensity deviation, calculates a wavelength adjustment amount through a closed-loop control algorithm, adjusts the wavelength of the detection light to realize preset working point locking of the optical fiber Bragg grating, obtains a temperature measurement value according to the adjusted detection light, extracts a high-frequency component of the first electric signal to obtain a vibration measurement value. The application improves the stability and reliability of measurement under a non-steady-state temperature environment.

Distortion in the output of an amplifier circuit is reduced while improving driving efficiency.　An amplifier circuit according to the present invention includes: a ΔΣ modulator for outputting a digital input by reducing the bit rate thereof; a PWM unit for generating a pulse width modulation (PWM) signal on the basis of the digital output of the ΔΣ modulator; a driver for generating an analog drive signal on the basis of the PWM signal; and a digital feedback unit for applying digital feedback on the basis of the result of a ΔΣAD conversion of the drive signal. The digital feedback unit may include a ΔΣ analog to digital converter (ADC) that performs AD conversion by oversampling the drive signal.

The present application relates to a kind of laser automatic frequency locking methods based on similarity recognition spectrum, comprising: S1, digital PID feedback controller is to laser output sweep voltage;S2, obtain the spectrum signal of laser output under current sweep voltage;S3, whether there is target spectrum in current spectrum signal based on similarity recognition algorithm is determined, if exists, execute step S4;If target spectrum is not identified, adjust sweep voltage and return to execute step S1;S4, based on the locking point of similarity coefficient peak position determination current characteristic spectrum;S5, after obtaining locking point, based on the frequency locking parameter of locking point determination current characteristic spectrum, control digital PID feedback controller is based on the control amount of the frequency locking parameter and carries out PID control locking.This method can achieve the finding of various spectral characteristic peaks and locking point, wide applicability, small environmental interference and method recognition efficiency is high.

1. Name of the product in this design: Digital Feedback Suppressor (DF-2). 2. Purpose of this design: Used in a sound reinforcement system to suppress howling and acoustic feedback phenomena of loudspeakers. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention relates to an impedance measurement system and an impedance measurement method. The system comprises an error current detection module, a digital vector negative feedback module and a feedback current output module. The error current detection module is used for detecting error current flowing into the input end of the error current detection module and converting the error current into a digital error signal; the digital vector negative feedback module is used for generating a digital feedback signal based on the received digital error signal and a preset orthogonal reference signal; and the feedback current output module is used for converting the received digital feedback signal into an analog feedback current until the error current value is 0. Through high-precision digital vector negative feedback, the error current corresponding to the measured device can be eliminated in a wide frequency range, the current measurement accuracy of the measured device is improved, and the impedance measurement accuracy of the measured device is further improved.

The invention discloses a self-adaptive wireless energy and signal simultaneous transmission device integrated with a QC feedback loop, which relates to the technical field of wireless energy and signal simultaneous transmission and comprises a transmitting end, a receiving end and a wireless channel. The transmitting end comprises an energy information fusion signal generator, a multi-mode transmitting coil array, a quantum channel state decoder and a cognitive adaptive controller. According to the method, channel state parameters are mapped to quantum states of entangled photons through quantum entanglement pair sources of a quantized feedback signal generator, and instantaneous correlation transmission of channel state information is achieved through feedback signals by means of quantum entanglement characteristics. A transmitting end does not need to completely deadjust feedback data packets, the channel state can be rapidly obtained through quantum state comparison, the delay bottleneck of traditional analog and digital feedback links is thoroughly broken through, and a system can capture channel microscopic changes in time.

Provided is a generator including a power amplifier, at least one sampler, an RF output, a signal generator, a controller including a digital control portion and an analogue control portion, an analogue feedback path between the at least one sampler and the controller enabling an analogue signal representation of a signal to be provided to the controller, and a digital feedback path between the at least one sampler and the controller enabling a digital signal representation of the signal to be provided to the controller. The controller is configured to adjust the RF signal at the RF output from a first state into a second state based on the analogue signal representation and / or the digital signal representation.

The invention discloses a USB data stream adaptive transmission method, device and equipment, a medium and a product, and relates to the technical field of communication transmission, and the method comprises the following steps: after a data stream transmission channel is established through a C-type interface, sending a target USB data stream to USB receiving equipment; and in the sending process, the data sending rate of the target USB data stream is updated in real time according to the digital feedback signal output by the analog-to-digital conversion module and a pre-constructed feedback signal control protocol until the target USB data stream is completely sent. The control information is fed back through the analog-to-digital conversion module, the USB data stream is adjusted in real time according to the data receiving state, the problems of data stream loss, overload and underload are avoided, the transmission efficiency of the whole data stream is optimized, and the reliability of data stream transmission is improved. And the pins in the C-type interface are multiplexed to transmit the feedback signal and the sending rate update instruction, so that the equipment connection is simplified, the equipment cost is reduced, and the integration level of the system is improved.

The invention discloses an electrical steel magnetism measuring device and a measuring method thereof, and the device comprises a magnetic conductometer, a primary winding receives an excitation signal to magnetize measured electrical steel, and a secondary winding induces the change of magnetic flux to output a secondary voltage signal; the analog-to-digital conversion module is used for collecting the secondary voltage signal and converting the secondary voltage signal into a digital feedback signal; the signal processing module is used for outputting a target waveform sequence according to the digital feedback signal and a preset reference waveform; the digital-to-analog conversion module is used for converting the target waveform sequence into a target waveform signal; and the power amplification module is used for amplifying the power of the target waveform signal, and outputting an excitation signal consistent with the waveform of the target waveform signal through voltage feedback and / or current feedback, so that the secondary voltage signal is consistent with the preset reference waveform. According to the invention, the problems that the output of the power amplifier is easy to distort and the high-resolution online volatility measurement is uncertain can be solved, and the consistency of waveform conditions and the test accuracy and efficiency when the magnetic performance of the tested electrical steel is tested are improved.

The invention discloses a self-adaptive clock data recovery device and method based on dual-mode clock frequency division and duty ratio modulation, and relates to the technical field of high-speed serial communication circuits. The self-adaptive clock data recovery device comprises a phase discriminator which is configured to be used for sampling an input data stream and generating an error signal indicating phase alignment; according to the invention, a mixed signal architecture is utilized to extract a time sequence from high-speed serial data, the system adopts an adaptive clock frequency divider, a target average frequency is synthesized by rapidly switching between two different frequency division factors, a digital feedback loop driven by a phase discriminator and a smoothing filter actively modulates the duty ratio of a frequency divider control signal, and the time sequence is extracted from the high-speed serial data. By selectively introducing higher or lower frequency cycles in the generated clock stream, the system accumulates precise phase offsets to align the recovered clock with the data, this approach provides an energy efficient and area efficient alternative for traditional designs that depend on complex analog phase interpolators.

A circuit comprising (1) one or more input devices configured to sense analog inputs, (2) at least one analog-to-digital converter communicatively coupled to the input devices and configured to convert the analog inputs into digital inputs, (3) at least one filter component communicatively coupled to the analog-to-digital converter and configured to output digital feedback based at least in part on the digital inputs, and (4) a digital-to-analog converter communicatively coupled to the filter component and configured to (A) convert the digital feedback into analog feedback and (B) output the analog feedback to facilitate removing the analog feedback from the analog inputs. Various other apparatus, systems, and methods are also disclosed.

The invention relates to a current supply system and method of operation thereof, related integrated circuit and power supply system. A control circuit for a voltage source generates a reference signal for the voltage source, wherein the reference signal is indicative of a requested output voltage to be generated by the voltage source. A digital feedforward control circuit calculates a digital feedforward regulation value indicative of the requested output voltage by determining a maximum voltage drop at a string of solid state light sources. A digital feedback control circuit determines a minimum voltage drop for a current regulator / limiter of the string and determines a digital feedback correction value from the minimum voltage drop. The control circuit then sets the reference signal after start-up from the digital feedforward regulation value and corrects the reference signal from the digital feedback correction value.

In one aspect, a device comprises: a dual-mode power amplifier for amplifying a first radio frequency (RF) signal of a first wireless protocol according to a linear operating mode and for amplifying a second RF signal of a second wireless protocol according to a non-linear operating mode; at least one digital feedback circuit coupled to the power amplifier, wherein the at least one digital feedback circuit provides feedback information; and a controller for controlling the power level of the dual-mode power amplifier, at least partially based on the feedback information.

Methods and apparatuses are described to provide digital feedback reduction (DFR) that may reduce or eliminate the presence of feedback in digital audio signals. The DFR techniques as described herein may implement a fast and reliable detection process to help ensure a minimal false detection probability. Furthermore, the DFR techniques as described herein may support a wider frequency range compared to conventional DFR techniques, for instance from 20 Hz up to at least 20 kHz.