61 results about "Analog front-end" patented technology

This invention discloses a high-overload data analysis method and system based on multi-dimensional buffer protection, relating to the field of data acquisition and storage technology. The system consists of several functional modules, including: a transient impedance module, which acquires stress wave propagation parameters and material strain data collected in real time by the recorder node, constructs a dynamic digital twin model of the buffer structure, and outputs impact feature vectors and stress field distribution matrices; a signal reconstruction module, which dynamically configures the sensing signals based on the impact feature vectors, including the gain, bandwidth, and filtering parameters of the analog front end, conditions and performs analog-to-digital conversion on the sensing signals, and uses compressed sensing and dictionary learning algorithms to sparsely reconstruct abnormal data, generating a high-fidelity data stream and storage data integrity identifiers for each storage block; and a federated storage module, which inputs the stress field distribution matrix and storage data integrity identifiers into the edge-side reinforcement learning decision engine to calculate the failure risk probability of each storage block.

This disclosure relates to a large dynamic range radiation detector and method that simultaneously achieves particle counting and energy integration. The radiation detector includes one or more detection channels, each channel comprising: a sensor, an analog front-end circuit, an analog-to-digital converter, a digital counting module, and a charge integration module. The sensor converts incident radiation into a current signal, the radiation including rays or particles. The analog front-end circuit amplifies the current signal and converts it into a voltage signal. The analog-to-digital converter converts the voltage signal into a digital waveform, the digital waveform including discretized voltage sample values. The digital counting module determines the pulse count information of the radiation based on the digital waveform. The charge integration module determines the charge integration information of the radiation based on the digital waveform. Therefore, both particle counting and energy integration detection methods can be implemented in the digital domain, effectively improving the performance of the radiation detector in terms of noise, energy resolution, and dynamic range.

The application discloses a kind of multi-modal flexible sensor adaptive signal conditioning system design method, belong to flexible sensor signal conditioning technical field.The present application overcomes the defects of poor universality, performance compromise, high cost of mass production of existing conditioning circuit, adopts layered decoupling and dynamic reconstruction system-level architecture: through multi-modal feature analysis and demand mapping modeling, the feature vector composition of scene recognition is determined;Design configurable analog front end, integrate instrument amplifier, transimpedance amplifier, charge amplifier, bridge amplifier four parallel processing sub-modules, wherein charge and bridge amplifier adopt self-designed architecture with dynamic adaptive gain adjustment capability;Build heterogeneous digital processing platform with NPU, CPU, DSP as core, through cross-modal data fusion, scene recognition engine, dynamic hardware configuration combined with feedforward and feedback, loadable algorithm library and closed-loop optimization control law, realize the real-time scene reconstruction of hardware parameters and digital algorithm;Combined with domestic single-chip selection, rigid-flex PCB and automatic calibration, meet the demand of low-cost mass production.The present application realizes the native adaptation and performance optimization of single hardware platform to voltage, current, charge, impedance and other types of sensor signals, and can be widely applied in robot dexterous hand, medical monitoring, intelligent bandage, consumer motion monitoring and industrial monitoring fields.

This invention discloses an integrated structure and method for data acquisition and transmission suitable for environments with strong electromagnetic interference, belonging to the field of high-speed data acquisition and communication technology. Addressing the problems of signal susceptibility to interference, low acquisition accuracy, and unstable transmission in complex electromagnetic environments such as nuclear fusion devices, a multi-level anti-interference data acquisition and transmission scheme is proposed. The structure includes an input impedance adaptive module, an isolation amplification module, a differential signal conversion module, an analog-to-digital conversion module, a digital signal processing module, an opto-isolation triggering module, and a fiber-optic-based 10 Gigabit Ethernet transmission module. Anti-interference is achieved at the analog front end through input impedance matching and isolation amplification; signal stability is improved through differential transmission and FPGA processing; and physical layer electromagnetic isolation is achieved using opto-isolation and fiber optic links. Furthermore, data packet verification and status reset mechanisms enhance data transmission reliability. This invention can achieve high-precision signal acquisition and high-speed stable transmission in strong electromagnetic environments, possessing excellent real-time performance and engineering application value.

The utility model discloses a novel parallel charging and discharging switching lithium battery box, including high -power lithium battery group and control MCU chip, high -power lithium battery group is connected control MCU chip through the analog front end AFE chip of setting, control MCU chip is provided with storage module and clock chip module and is accessed system power supply. The lithium battery box proposed in this scheme can increase or reduce the number arbitrarily, is suitable for the power supply device of small -size monitoring station such as high mountain, gorge, border, coast, as the supplement of power grid gap network.

The present application belongs to the technical field of medical ultrasonic signal processing, and specifically relates to a spermatic vein ultrasonic imaging enhancement system and method based on double-wall filtering and adaptive Doppler signal processing. The system comprises a dynamic reconfigurable analog front end, a dual-channel heterogeneous data processing unit and a closed-loop feedback controller. The method extracts fluid dynamics characteristics in real time through an auxiliary path, intelligently identifies resting state and action mutation state. At the action mutation moment, the physical layer automatically switches the analog filtering parameters to prevent signal saturation, and the digital layer adaptively increases the FIR filter weight to eliminate the ringing artifact; in the resting state, the high-gain analog configuration is maintained and the IIR filter is dominated to capture weak signals. With the delay buffer mechanism, accurate timing alignment of control instructions and imaging data is realized. The present application effectively solves the contradiction between low flow rate detection sensitivity and strong tissue motion interference suppression, eliminates the flicker artifact generated by breath holding action, and significantly improves the diagnosis accuracy of weak reflux.

The wearable physiological monitoring intelligent glove has the advantages that the wrist covering part, the back of hand covering part, the finger surface covering part and the finger tip wrapping part are sequentially connected, the wrist covering part is fixed with the main machine shell, the wrist band is sewn on the wrist covering part, the end of the wrist band is extended to bind the wrist, the battery, the blood oxygen integrated analog front end, the AD conversion circuit, the MCU main control circuit, the power supply circuit and the wireless communication circuit are arranged in the main machine shell, the switch, the power supply indicator lamp and the state indicator lamp are embedded on the main machine shell, the surface of the back of hand covering part and the finger surface covering part is provided with the long strip part along the length direction, the anti-static isolation film and the finger tremor sensor are arranged in the long strip part along the length direction, the blood oxygen saturation sensor is arranged in the finger tip wrapping part, the finger surface band is sewn on the finger surface covering part, the end of the finger surface band is extended to bind the finger, the finger tip band is sewn on the finger tip wrapping part, and the end of the finger tip band is extended to bind the finger tip wrapping part.

The application relates to the technical field of semiconductors, and provides a micro health detection device. The device comprises a chip-level light source for emitting detection light; a photodiode module stacked above the chip-level light source and facing the light-emitting front surface of the chip-level light source, for receiving light signals transmitted or reflected by the detection light and converting the light signals into electric signals; and an analog front end module stacked above the photodiode module, for receiving the electric signals sent by the photodiode module and processing the electric signals. The device solves the problem of large size of the health detection device in the prior art, reduces the size of the health detection device, and makes the health detection device more suitable for wearable or portable health monitoring applications.

This application relates to pressure detection technology and discloses a flexible pressure acquisition system, device, and method based on a parallel architecture. It includes a signal acquisition and control module, a pressure sensor array, and an environmental monitoring module. The signal acquisition and control module includes an MCU and analog front-end circuitry. The analog front-end circuitry includes K parallel analog multiplexers. The MCU internally has K corresponding ADC channels. The pressure sensor array is electrically connected to the signal acquisition and control module, and its M×N pressure sensing units are divided into K parallel acquisition sub-regions. Each sub-region's column electrodes are connected to an analog multiplexer input channel. The environmental monitoring module acquires real-time environmental parameters. The MCU synchronously triggers all ADC channels to synchronously convert the pressure signals of the K sub-regions, and combines the environmental parameters with an adaptive filtering algorithm for compensation and correction, outputting pressure distribution data. This application can improve the sampling rate and measurement accuracy of the pressure acquisition system.

This invention belongs to the field of electrochemical testing technology and discloses a dual-plate portable electrochemical testing system, including an upper plate, a lower plate, an electrochemical biosensor electrode converter, and a mobile terminal APP. The invention adopts an upper and lower plate structure, separating the data programming surface and the sensor interface surface, facilitating the replacement and upgrading of computing resources and the analog front-end separately. The invention hierarchically lays out the three-electrode interface analog circuit and the communication control circuit, and separates the power supply for digital and analog power supplies, which helps reduce mutual interference between the sensor's analog signal lines and digital communication signal lines, improving the stability of electrochemical testing. This invention enables wireless interaction via a mobile terminal and can be portablely powered by an external terminal device, offering flexible usage and facilitating on-site deployment and mobile testing. This invention supports multiple testing modes, including cyclic voltammetry, chronoamperometry, and differential pulse voltammetry, adapting to different electrochemical testing needs.

The application relates to an FPGA prototype verification method and system of a smart meter chip, and belongs to the field of integrated circuit testing and electric power metering. The method aims to solve the problems of ASIC design transplantation to an FPGA platform, large difference between a verification environment and a real power grid, and lack of a real-time closed-loop verification mechanism. A technical scheme efficiently transplants the design to the FPGA by optimizing ASIC front-end synthesis constraints and adopting a netlist-level IP replacement strategy; a hardware-in-the-loop system is constructed, which comprises a real power grid signal source, a separation device simulation front end, an FPGA verification board, a high-precision standard electric energy meter and a host computer. The system can generate a real power grid excitation and realize synchronous collection of prototype output and the standard meter, real-time error analysis and dynamic adjustment of parameters, thereby forming a closed-loop verification. The application significantly improves code transplantation efficiency, provides a highly consistent real power grid verification environment, and greatly improves verification iteration and defect positioning speed.

The invention provides a battery pack, a battery pack acquisition line impedance anomaly detection method and a vehicle, and relates to the technical field of vehicles. An impedance detection loop composed of a detection switch and a first resistor is arranged in a battery pack, a battery management system obtains a first voltage value and a second voltage value of the input end of an analog-to-digital converter of an analog front-end chip by controlling opening and closing of the detection switch, and then the first voltage value and the second voltage value are obtained by combining a preset impedance judgment threshold value. And whether the acquired line impedance is abnormal can be accurately judged. According to the battery pack provided by the invention, early and accurate detection of the impedance abnormity of the acquisition line can be realized, and the situation that the battery management system misjudges the voltage of the battery monomer due to the impedance abnormity of the acquisition line is avoided, so that potential safety hazards such as over-charge, over-discharge, short circuit and thermal runaway caused by unbalance of charge and discharge strategies are prevented, the after-sales maintenance cost is reduced, and the service life of the battery pack is prolonged. And the operation safety and stability of the power battery pack in a new energy electric vehicle, an energy storage system and industrial equipment are ensured.

This invention discloses a dual-channel, multi-mode, low-power EEG signal acquisition system, relating to the field of brain-computer interface technology. It includes: N electrode channels for acquiring EEG signals; N time-division multiplexing switches, whose inputs are respectively connected to the N electrode channels, and whose outputs are connected in parallel to a shared analog front-end processing link; and N peak detectors, whose inputs are respectively connected to the N electrode channels, for real-time detection of whether the amplitude of the EEG signal in the corresponding channel exceeds a preset threshold. This invention addresses the time-frequency characteristics differences between LFP and AP signals by employing time-division multiplexing and event-driven acquisition mechanisms: for slowly varying continuous LFP signals, the analog front-end and analog-to-digital converter resources are shared; for sparse, bursty AP signals, high-speed sampling is initiated only when a discharge event is detected. Compared to the traditional full-channel high-speed continuous sampling architecture, this significantly reduces the average operating bandwidth and dynamic power consumption of the analog-to-digital converter, improving the system's energy efficiency ratio.

This invention discloses a method and apparatus for rapidly generating a BMS simulated front-end driver. The method includes: acquiring general configuration information configured by a preset general configuration module, command configuration information preset by a preset command configuration module, function description information preset by a preset function description module, and timing configuration information preset by a preset timing configuration module; and generating a BMS simulated front-end driver based on the general configuration information, command configuration information, function description information, and timing configuration information. The rapid generation method for BMS simulated front-end drivers provided in this application describes each module using a fixed pseudocode template and then uses a code generation module for automatic code generation, significantly shortening the development cycle and ensuring consistent development quality. Furthermore, the pseudocode review process improves review quality, thereby enhancing the overall development quality of the driver.

An active equalization circuit, a battery management system, and an active equalization control method. The active equalization circuit comprises: a plurality of equalization modules (231-23n) that are cascaded, are respectively sequentially connected to at least one group of batteries in a battery pack (240), and are configured to control energy equalization between the at least one group of batteries; an analog front-end sampling module (220), connected to a first enable port and a first I2C communication port of a first-stage equalization module (231) among the plurality of cascaded equalization modules (231-23n), and configured to read operating parameters of the plurality of equalization modules (231-23n) from registers of the plurality of equalization modules (231-23n), so as to monitor operating states of the plurality of equalization modules (231-23n), wherein the operating parameters comprise an equalization direction parameter, and at least one of a current parameter and a flag bit parameter.

This application discloses a multi-channel bioelectric signal transmission method, device, and storage medium. The device includes: an analog front-end module comprising multiple analog front-end units, each analog front-end unit including multiple acquisition channels for acquiring bioelectric signals and performing analog-to-digital conversion, transmitting the converted data stream to a data transmission module; and a data transmission module connected to the analog front-end module via a four-data-line serial peripheral interface for receiving the data stream and transmitting the received data stream to a remote host via a wireless ultra-wideband module; wherein the data transmission module has multiple switchable operating modes. This application provides a bioelectric signal transmission device that integrates multiple operating modes suitable for various scenarios, reduces system power consumption, and realizes multi-channel acquisition and wireless transmission of bioelectric signals.

The application discloses an 8-point phase array non-basic harmonic suppression method and system based on a magnetic encoder and the magnetic encoder, eight magnetic sensitive elements are regularly arranged along the circumferential direction of a magnetic ring of the magnetic encoder, are divided into four groups of differential pair signals, magnetic field signals output by the magnetic sensitive elements are acquired, original differential signals of each group are calculated, and basic reference deviation and even harmonic components are eliminated; the eight magnetic sensitive elements are distributed to sine and cosine channels, third harmonic components of the sine channel are eliminated according to two groups of original differential signals corresponding to the sine channel, pure sine signals are obtained, and third harmonic components of the cosine channel are eliminated according to two groups of original differential signals corresponding to the cosine channel, and pure cosine signals are obtained. According to the application, the eight magnetic sensitive elements are arranged according to a certain rule, signal vectors of specific space phases are superposed, third harmonic components are mutually offset in an analog front end, and third harmonic components, even harmonic components and basic reference deviation are completely eliminated from a physical hardware layer.

An apparatus for canceling clock-to-signal interference in a multi-lane SerDes comprising an analog front-end circuit receiving an input signal from a signal path mixed with interference from a clock path. The apparatus includes a phase interpolator circuit implemented in the clock path to generate multiple phases of a clock signal and to provide a timing rotated by the phases for a track-and-hold circuit to sample the input signal and the interference in every cycle. The apparatus also includes an analog-to-digital converter configured to digitize the input signal and the interference to provide an ADC output and a digital-interference-cancellation circuit configured to demultiplex the ADC output and detect a baseline offset associated with the interference sampled at one of the phases in each demultiplexed path using a digital loop to calibrate the baseline offset.

This invention discloses a deep learning-based analog front-end sensor noise filtering system and method, belonging to the field of sensor signal processing technology. It includes an analog front-end sensor, a signal preprocessing module, a differentiable noise coupling feature detection module, a programmable RC filter network, an ADC module, a deep learning fine filtering module, and a signal output module. By first preprocessing the sensor output signal, detecting noise coupling features, and then driving the programmable RC filter network to achieve analog domain coupling noise pre-suppression, followed by analog-to-digital conversion and digital domain fine filtering by a lightweight residual CNN model, a closed-loop linkage mechanism between the analog and digital domains is constructed. This invention achieves precise end-to-end suppression of coupling noise, solves the problem of low-frequency noise residue, adapts to a wide temperature range environment, improves system filtering stability and operational reliability, and is suitable for high-precision sensor signal acquisition scenarios.

This application provides a novel EEG analog front-end sampling circuit, including a first electrode, a second electrode, an EEG acquisition module, an EEG processing module, a communication isolation module, and a power isolation module. The input terminal of the EEG acquisition module is connected to the first and second electrodes for acquiring EEG signals. The communication isolation module provides uplink and downlink communication for the novel EEG analog front-end sampling circuit, preventing interference from host computer communication. The power isolation module provides operating power for the novel EEG analog front-end sampling circuit, isolating conducted interference from power frequency signals. The novel EEG analog front-end sampling circuit provided in this application isolates communication between the novel EEG analog front-end sampling circuit and the host computer through the communication isolation module, and isolates the power supply from the power supply through the power isolation module. This avoids interference from PC communication and power frequency power during the acquisition process, thereby effectively improving signal acquisition quality and enhancing user experience.

Analog front end circuit and gain amplifier thereof are disclosed. The analog front end circuit is configured to be coupled to a sensor having a plurality of sensing units. The analog front end circuit includes a plurality of sensing circuits and a plurality of multiplexers. Each multiplexer is coupled between one of the plurality of sensing units and at least two of the plurality of sensing circuits.

The utility model relates to battery voltage detection, specifically relates to a kind of multi-channel battery voltage detection circuit with equalization function, multiplexer module is connected between the battery pack to be measured and analog front-end sampling chip AFE, under the control of controller MCU, corresponding channel is selected to pass battery voltage signal to analog front-end sampling chip AFE, while corresponding channel is selected to carry out passive equalization and active equalization to the battery pack to be measured;Analog front-end sampling chip AFE is connected between multiplexer module and controller MCU, battery voltage signal is sent to controller MCU, realizes battery voltage detection, while under the control of controller MCU, the passive equalization of the battery pack to be measured is realized using the discharge channel of itself;The technical scheme provided by the utility model can effectively overcome the defects that the voltage of each lithium battery in parallel battery module cannot be accurately and quickly detected, and the function of battery voltage detection circuit is single.

This invention proposes an NDIR sensor based on an LED light source and an adaptive scheduling method. The sensor includes an optical cavity containing a PCB circuit board and a gas sensing and detection module. The PCB circuit board includes at least a power supply unit, a microcontroller unit, and an analog front-end unit connected in sequence, as well as a data storage unit connected to the microcontroller unit. The microcontroller unit and the power supply unit are also connected to the outside through an interface on the optical cavity. The gas sensing and detection module includes an LED light source and a photodetector, both of which are connected to the analog front-end unit. The microcontroller unit integrates an initialization module, a mode scheduling module, a concentration calculation module, a threshold optimization module, and a timer control module. The method avoids the problems of volume, cost, and preheating error of traditional sensor solutions by using dual-mode dynamic operation based on a single sensing unit and adaptive threshold optimization, achieving intelligent power consumption control and improved accuracy.

The utility model relates to supercapacitor active equalization field discloses a kind of supercapacitor active equalization circuit, including MCU, AFE (analog front end), light MOS tube drive circuit, H bridge circuit, DC / DC isolated bidirectional power supply and rechargeable battery, the light MOS tube drive circuit includes Q1 pipe, Q2 pipe, Q3 pipe and Q4 pipe, the Q1 pipe, Q2 pipe, Q3 pipe and Q4 pipe are connected with the both ends of single supercapacitor monomer respectively, the input end of AFE (analog front end) is connected with RC filter network, the MCU is connected with light MOS tube drive circuit by SPI, the MCU is electrically connected with rechargeable battery.The utility model in the high voltage supercapacitor monomer is stored energy by rechargeable battery, avoid energy loss consumptive waste, reach the goal of active equalization, using rechargeable battery and the fast power supply mode of DC / DC isolated bidirectional power supply, active equalization for low voltage average value voltage's battery, shortens equalization time.

An optical receiver includes one or more photodetectors and an analog front end (AFE) configured to accept input signals from the one or more photodetectors. The AFE includes a non-linear gain amplifier (NLGA). The NLGA includes a piecewise linear gain stage configured to apply a piecewise linear transfer function to the input signals to form amplified signals. The AFE also includes a DC offset stage configured to apply a DC offset to the amplified signals. A related method of operation and vehicle are also disclosed.

The application relates to a wearable integrated self-powered bimodal sensing integrated system based on a flexible zinc-based battery and application, and belongs to the technical fields of flexible electronics, electrochemical energy storage and intelligent sensing technology. The application constructs a complete closed-loop system containing a special analog front-end signal conditioning-low-power wireless transmission-upper computer intelligent algorithm. The system solves the problems of high internal resistance matching and baseline drift of the flexible battery-sensor system through a customized small circuit, and further connects device preparation and system application, so that in-situ online monitoring without external equipment, all-weather and wearable is realized.

The application discloses a terminal circuit with bandwidth expansion and impedance matching functions, and belongs to the technical field of basic electronic circuits. In view of the defects in the prior art, the terminal circuit is designed by adopting a simplified three-stage asymmetric T-coil technology, and the terminal circuit comprises a first pad capacitor, a second pad capacitor, a first impedance matching module, a first bandwidth expansion module based on a three-stage asymmetric T-coil structure, a second impedance matching module, a second bandwidth expansion module based on the three-stage asymmetric T-coil structure, a first terminal resistor, a second terminal resistor and a load circuit. The terminal circuit can greatly enhance the bandwidth expansion capability, uses a small number of inductors and capacitors, has a good impedance matching effect, and realizes a great reduction of area overhead. Meanwhile, the application has high engineering applicability, is suitable for engineering product design, can be widely used in the design of a SerDes analog front end, can greatly improve the performance index of the analog front end, and simultaneously reduces comprehensive overhead.

The present disclosure proposes a transmitter and receiver for medical applications, wherein the transmitter comprises: an analog front end for receiving an analog signal of a neural electrode; a digital baseband processing module for digitizing and channel coding the analog signal to obtain a coded signal; a modulator for 16-QAM modulation of the coded signal to obtain a modulated signal; 16-QAM modulation is used to improve the scalable data rate; a plurality of target frequency signals are generated by a phase-locked frequency divider, and the target frequency signals are divided into a plurality of target sub-frequency signals; the phase of the modulated signal is adjusted based on the plurality of target sub-frequency signals to obtain a phase-adjusted signal, realizing multi-band data transmission within the transmitter; and finally a power amplifier amplifies the phase-adjusted signal, and the amplified phase-adjusted signal is transmitted to a transmitting unit so that the transmitting unit transmits a signal, realizing high-speed and low-power signal transmission.

A circuit includes an analog-to-digital converter (ADC). The circuit also includes an analog front end (AFE, 310) having an AFE input and an AFE output. The AFE output is coupled to an input of the ADC. The AFE includes a programmable gain amplifier (PGA, 115) having a first PGA input and a second PGA input. The PGA (115) includes a first operational amplifier (OP AMP, OP1) having first and second OP AMP inputs. The AFE (310) also includes a programmable resistance circuit (320) having a first programmable resistance circuit input and first and second programmable resistance circuit outputs. The first programmable resistance circuit input is coupled to the first and second PGA inputs. The programmable resistance circuit (320) includes a resistor network having first and second balancing resistances. The first balancing resistance is coupled to the first and second OP AMP inputs, and the second balancing resistance is coupled to the first and second OP AMP inputs.

This invention relates to the field of analog front-end technology and discloses a multi-channel high common-mode rejection ratio (CMRR) signal acquisition system based on idle-phase common-mode cancellation technology. The system includes: a multi-channel presampler based on a floating dynamic operational amplifier and idle-phase common-mode cancellation technology, used to sample weak input signals. Simultaneously, the output signal is periodically short-circuited during idle phases at the presampler's output to eliminate common-mode signals and improve the CMRR; a multi-channel noise-shaping successive approximation analog-to-digital converter (ADC), which takes the weak signal acquired by the presampler as input and outputs a digital signal; and an ADC that provides a time-division multiplexed clock to drive the presampler, achieving phase-synchronized clock control. The presampler technology based on idle-phase common-mode cancellation proposed in this invention has advantages such as low power consumption and high CMRR, and is suitable for low-gain multi-channel neural signal acquisition systems, effectively eliminating common-mode interference during neural signal acquisition.