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361 results about "Transimpedance amplifier" patented technology
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In electronics, a transimpedance amplifier, (TIA) is a current to voltage converter, almost exclusively implemented with one or more operational amplifiers. The TIA can be used to amplify the current output of Geiger–Müller tubes, photo multiplier tubes, accelerometers, photo detectors and other types of sensors to a usable voltage. Current to voltage converters are used with sensors that have a current response that is more linear than the voltage response. This is the case with photodiodes where it is not uncommon for the current response to have better than 1% nonlinearity over a wide range of light input. The transimpedance amplifier presents a low impedance to the photodiode and isolates it from the output voltage of the operational amplifier. In its simplest form a transimpedance amplifier has just a large valued feedback resistor, Rf. The gain of the amplifier is set by this resistor and because the amplifier is in an inverting configuration, has a value of -Rf. There are several different configurations of transimpedance amplifiers, each suited to a particular application. The one factor they all have in common is the requirement to convert the low-level current of a sensor to a voltage. The gain, bandwidth, as well as current and voltage offsets change with different types of sensors, requiring different configurations of transimpedance amplifiers.
Trans-impedance amplifier device for optical receiver
PendingCN120498390ALogic circuits characterised by logic functionAmplifier modifications to raise efficiencyHemt circuitsTransimpedance amplifier
A transimpedance amplifier device for an optical receiver disclosed by the present invention comprises a bias circuit, a transimpedance amplifier and an amplification driving circuit which are connected in sequence, the bias circuit comprises an upper bias structure and a lower bias structure, and the upper bias structure and the lower bias structure are both connected with the transimpedance amplifier to generate different bias currents. It is ensured that the photodiode PD1 can be conducted and generate light current when light passes through the photodiode PD1, the transimpedance amplifier is used for converting the current into voltage to be output, and the amplification driving circuit is used for amplifying the voltage. According to the optical receiver circuit, micro current generated by the photodiode can be converted into output voltage in a relatively high output range through the transimpedance amplifier, and compared with a traditional optical receiver circuit, the optical receiver circuit is relatively low in cost in circuit structure and has the advantages of low power consumption and high reliability. The driving capability of the circuit can be improved under the condition that a complex amplifier loop and a photoelectric conversion module are not needed, the output voltage in a high range is output, and the performance and the stability are further enhanced.
Owner:SICHUAN HUIYUAN PLASTIC OPTICAL FIBER
Devices for digital-domain temperature compensation in logarithmic transimpedance amplifiers
PendingUS20250253809A1Logarithmic/exponential functionsAmplifier modifications to reduce temperature/voltage variationComputational physicsTransimpedance amplifier
Technologies are provided to calculate a logarithm of an input current to a logarithmic transimpedance amplifier device at a particular temperature. The logarithm of the current is calculated in digital domain based on sampling of analog signals that are internal to the logarithmic transimpedance amplifier device. The sampling can be performed, in some cases, by an analog-to-digital converter device integrated into the logarithmic transimpedance amplifier device. The calculation in digital domain is performed by one or more processor external to the logarithmic transimpedance amplifier device. The calculation includes a determination of a temperature compensation factor based on an internal analog signal indicative of temperature of the logarithmic transimpedance amplifier device. The temperature compensation factor permits removing temperature dependence from a logarithmic output voltage originating from the input current. Operating in the digital domain permits applying corrections that account for residual leakage current and an emitter-resistance correction at high input currents.
Owner:ANALOG DEVICES INC
Variable gain acquisition circuit applied to high-speed silicon optical module and optical module
The utility model relates to the technical field of optical communication, in particular to a variable gain acquisition circuit applied to a high-speed silicon optical module and an optical module, the high-speed silicon optical module comprises an MZM modulator, a main path monitoring diode and an auxiliary path monitoring diode of a tap output in an output optical path of the MZM modulator are connected with respective corresponding variable gain transimpedance amplification circuits, and the main path monitoring diode and the auxiliary path monitoring diode are connected with the corresponding variable gain transimpedance amplification circuits. The signal output end of the variable gain transimpedance amplification circuit is connected to the signal input end of the MCU through the analog-to-digital converter, and the signal output end of the MCU is connected to the signal input end of the MZM modulator through the digital-to-analog converter. According to the utility model, the variable gain transimpedance amplification circuit is utilized to monitor the main path monitoring diode MPDmain and the auxiliary path monitoring diode MPDsub of the tap output in the output light path of the MZM modulator in real time, stable and more accurate sampling can be realized under the condition of different current magnitudes, and the gain can be adjusted in real time according to the change condition of the sampling value.
Owner:EOPTOLINK TECH INC LTD
MEMS resonator low ripple error temperature measurement system based on voltage feedback compensation
PendingCN121740273AThermometers using electric/magnetic elementsUsing electrical meansConvertersSoftware engineering
The invention discloses an MEMS resonator low ripple error temperature measurement system based on voltage feedback compensation, and the system comprises a trans-impedance amplifier, an analog-to-digital converter, a frequency detection module, a PI controller, a variable gain amplifier, a Schmitt trigger, a first digital-to-analog converter, a biasing circuit, mode switches S1 and S2, and a voltage feedback compensation loop. The compensation loop comprises an amplitude detection module, a lookup table, a second digital-to-analog converter and an adder; the amplitude detection module receives the digital signal from the analog-to-digital converter and outputs a vibration amplitude signal in real time; the lookup table receives the vibration amplitude signal, inquires and outputs a corresponding digital compensation voltage, and converts the digital compensation voltage into an analog voltage through a second digital-to-analog converter; the adder adds the analog voltage and a fixed bias voltage to generate a dynamic bias voltage and applies the dynamic bias voltage to a drive electrode of the MEMS resonator. According to the system, an amplitude-driving end bias voltage feedback compensation loop is introduced, so that the periodic ripples of the resonant frequency are effectively suppressed.
Owner:SHANGHAI JIAOTONG UNIV
Optical data signal receiver
PendingUS20250337500A1Gain controlAmplifier with semiconductor-devices/discharge-tubesControl signalSoftware engineering
An assembly of electronic components for reception of data using an optical fiber wherein data is received in bursts, the assembly including: a photodiode; a transimpedance amplifier coupled to said photodiode, wherein a gain of the transimpedance amplifier is adjusted based on a level of a gain control signal; a received input signal sensor configured to sense a received input signal level; and a signal preamble detector configured to detect the end of at least one of said preamble patterns in a data burst conveyed in said received signal and further configured to generate said settling control signal as an output.
Owner:TOP INTEGRATED CIRCUITS LTD
Germanium-silicon photoelectric detector array-based global self-defined sampling method
PendingCN122069437AFinal product manufacturePhotometry using electric radiation detectorsConvertersDetector array
The invention relates to the technical field of photoelectric detection, in particular to a global self-defined sampling method based on a germanium-silicon photoelectric detector array, which comprises the following steps of: S1, constructing the germanium-silicon photoelectric detector array with an n * t specification, receiving a target optical signal by using each detector unit as a pixel point, converting the target optical signal into an initial current signal, the signal is linearly amplified into a voltage signal through an external transimpedance amplifier; s2, digitalizing the voltage signal into a binary discrete digital signal through a high-speed analog-to-digital converter at the output end of the trans-impedance amplifier; and S3, performing global synchronous sampling to obtain a first group of data, performing repeated sampling in the same mode to obtain multiple groups of data, performing pixel-by-pixel superposition to generate fused data, and performing user-defined setting on the repeated sampling frequency within 1-1024 times. By customizing the number of repeated sampling times and data superposition, adapting to different light intensities and expanding the detection dynamic range, the problems of strong light overexposure and weak light underexposure are solved, the data consistency is guaranteed in combination with global synchronous sampling, and the detection precision and the environmental adaptability are improved.
Owner:JILIN UNIVERSITY
Electro-optical transmitter and receiver integrated circuit (core particle) for co-packaged optics and method of operation thereof
PendingCN121312299ACoupling light guidesOptical waveguide light guideElectro-absorption modulatorLaser light
An electro-optical integrated circuit comprising an optical transmitter and an optical receiver is disclosed in which a monolithically integrated electro-absorption modulated laser (EML) can operate bi-directionally in both transmitter and receiver modes. Vertically stacked waveguides for lasers and electro-absorption modulators (EAMs) are provided. The laser and the EAM are optically coupled through a transverse conical vertical optical coupler. The EML includes monolithically integrated electronic circuitry, such as drivers and control electronics for driving the laser as the EML and the EAM in the transmitter mode. The control circuit includes a transimpedance amplifier (TIA). The EAM has a first portion and a second portion that may be independently biased. In receiver mode, the laser current is reduced near a threshold, a first portion of the EAM is biased to absorb residual laser light, while a second portion of the EAM provides photocurrent to the TIA as a photodiode receiver.
Owner:ELECTROPHOTONIC IC INC
Potentiostat-based electrochemical sensor detection device and system including same
PCT designated stageWO2025198166A1Multiple-port networksDifferential amplifiersDigital signal processingLow-pass filter
Provided is a potentiostat-based electrochemical sensor detection device. The device comprises: a digital-to-analog converter (DAC) configured to receive a digital signal from a waveform generator and digital logic and output an analog signal corresponding to a reference voltage; a control amplifier (CA) configured to receive the analog signal corresponding to the reference voltage and apply the reference voltage to a reference electrode (RE); a gain-boosting current mirror configured to copy a sensor current of an electrochemical sensor and output a copied sensor current; a transimpedance amplifier configured to convert the copied sensor current into a voltage signal; a low-pass filter configured to block a high-frequency band signal component of the voltage signal; and an analog-to-digital converter (ADC) configured to perform digital signal processing on a signal having passed through the low-pass filter, wherein at least one of the gain-boosting current mirror and the transimpedance amplifier employs a dynamic element matching (DEM) technique using a plurality of choppers and a plurality of DEM clock signals.
Owner:KOREA ADVANCED INST OF SCI & TECH
Systems and devices for digital-domain temperature compensation in logarithmic transimpedance amplifiers
PendingUS20250244167A1Analogue/digital conversionAmplifier with semiconductor-devices/discharge-tubesA d converterComputational physics
Technologies are provided to calculate a logarithm of an input current to a logarithmic transimpedance amplifier device at a particular temperature. The logarithm of the current is calculated in digital domain based on sampling of analog signals that are internal to the logarithmic transimpedance amplifier device. The sampling can be performed, in some cases, by an analog-to-digital converter device integrated into the logarithmic transimpedance amplifier device. The calculation in digital domain is performed by one or more processor external to the logarithmic transimpedance amplifier device. The calculation includes a determination of a temperature compensation factor based on an internal analog signal indicative of temperature of the logarithmic transimpedance amplifier device. The temperature compensation factor permits removing temperature dependence from a logarithmic output voltage originating from the input current. Operating in the digital domain permits applying corrections that account for residual leakage current and an emitter-resistance correction at high input currents.
Owner:ANALOG DEVICES INC
Ocean laser radar and method for preventing water surface signal saturation
The invention discloses an ocean laser radar and method for preventing water surface signal saturation, and belongs to the technical field of laser radars. The ocean laser radar comprises a laser emission system, an optical system, a signal processing system and a data acquisition and processing system. The laser emission system emits laser and generates a trigger pulse; the optical system splits the backward scattered light into first split light and second split light through a beam splitter prism; in the signal processing system, a first processing branch converts first split light into a first electric signal through a first photoelectric detector, a high-speed switch and a first transimpedance amplifier, and a second processing branch converts second split light into a second electric signal through a second photoelectric detector and a second transimpedance amplifier; and the data acquisition and processing system controls laser emission, high-speed switching and electric signal acquisition and processing. According to the ocean laser radar and method for preventing water surface signal saturation, a high-speed switch can be controlled, water surface high-reflection signals are prevented from entering a trans-impedance amplifier, and underwater signals are prevented from being affected.
Owner:崂山国家实验室
Extinction ratio measuring system and extinction ratio measuring method
The invention discloses an extinction ratio measurement system and an extinction ratio measurement method, and relates to the technical field of optical module extinction ratio measurement. The transimpedance amplification circuit is connected with the optical module to be measured and used for monitoring the optical signal intensity of the optical module to be measured and obtaining a power monitoring voltage signal; decomposing the optical signal of the optical module to be tested to obtain a reference voltage signal and a test voltage signal; the linear output circuit is connected with the transimpedance amplification circuit and used for carrying out linear amplification on a difference value between the reference voltage signal and the test voltage signal to obtain a modulation amplitude voltage signal; and the processing circuit is respectively connected with the transimpedance amplification circuit and the linear output circuit, and is used for determining the light modulation amplitude according to the ratio of the power monitoring voltage signal to the modulation amplitude voltage signal, and determining the extinction ratio of the optical module to be detected according to the light modulation amplitude and the light power corresponding to the power monitoring voltage signal. The measurement cost of the extinction ratio of the optical module can be reduced.
Owner:SICHUAN TRIXON COMM TECH CORP LTD
Techniques for digital-domain temperature compensation in logarithmic transimpedance amplifier devices
PendingUS20250247055A1Amplifier modifications to reduce non-linear distortionThermometers using electric/magnetic elementsA d converterComputational physics
Technologies are provided to calculate a logarithm of an input current to a logarithmic transimpedance amplifier device at a particular temperature. The logarithm of the current is calculated in digital domain based on sampling of analog signals that are internal to the logarithmic transimpedance amplifier device. The sampling can be performed, in some cases, by an analog-to-digital converter device integrated into the logarithmic transimpedance amplifier device. The calculation in digital domain is performed by one or more processor external to the logarithmic transimpedance amplifier device. The calculation includes a determination of a temperature compensation factor based on an internal analog signal indicative of temperature of the logarithmic transimpedance amplifier device. The temperature compensation factor permits removing temperature dependence from a logarithmic output voltage originating from the input current. Operating in the digital domain permits applying corrections that account for residual leakage current and an emitter-resistance correction at high input currents.
Owner:ANALOG DEVICES INC
Miniaturized photoelectric detector
The invention relates to the technical field of photoelectric detection, and particularly discloses a miniaturized photoelectric detector, which comprises a tube shell, one end of the tube shell is provided with a cover plate, and the other end of the tube shell is provided with a radio frequency connector and a pin in a penetrating manner; the photoelectric conversion assembly comprises a first substrate, a second substrate, a photodiode and a transimpedance amplifier which are arranged in the tube shell, the radio frequency connector and the transimpedance amplifier are both electrically connected with the first substrate, the photodiode and the pins are both electrically connected with the second substrate, and the second substrate and the photodiode are both electrically connected with the transimpedance amplifier; the shielding cover is arranged in the tube shell and is arranged outside the radio frequency connector in a surrounding manner; wherein an optical fiber assembly and a lens assembly are arranged on the outer side and the inner side of the cover plate respectively, a through hole is formed in the cover plate, and the optical fiber assembly, the through hole, the lens assembly and the photodiode are located on the same straight line. The system is compact in structure, beneficial to system integration, high in anti-interference capability, high in stability and high in reliability.
Owner:CHENGDU XIJIAO JIERUI OPTOELECTRONICS TECH CO LTD
High-speed multi-channel light receiving assembly
The invention relates to a high-speed multi-channel optical receiving assembly, which relates to the technical field of optical transmission and comprises an optical fiber array, a waveguide type photoelectric detector, a trans-impedance amplifier and a connecting substrate, the optical fiber array serves as an optical input port and is used for receiving the multi-channel optical signals and transmitting the multi-channel optical signals to the waveguide type photoelectric detector; the waveguide type photoelectric detector is fixed on the surface of the connecting substrate and is used for converting an optical signal input by the optical fiber array into an electric signal; the light output end of the optical fiber array is directly coupled with the light input waveguide; the transimpedance amplifier is fixed on the surface of the connecting substrate, is connected with an electric signal output end of the waveguide type photoelectric detector through a transmission line, and is used for converting a current signal output by the photoelectric detector into a voltage signal; and the connecting substrate is used for realizing electric interconnection between the waveguide type photoelectric detector and the trans-impedance amplifier. According to the invention, channel expansion of the optical receiving assembly is facilitated, high-efficiency coupling of optical paths is realized, and large bandwidth and high responsivity are realized at the same time.
Owner:雄安创新研究院
Continuous time linear equalization (CTLE) feedback for tunable DC gain and mid-band correction
ActiveUS12381527B2Differential amplifiersAmplification control detailsSoftware engineeringHemt circuits
An analog front end (AFE) circuit including: a continuous time linear equalizer (CTLE) circuit; a transimpedance amplifier (TIA) connected to the CTLE circuit; and a feedback circuit including: a first transistor connected between a first output of the feedback circuit and a first node connected to a first current source; a second transistor connected between a second output of the feedback circuit and a second node connected to a second current source; and a first tunable resistor coupled between the first node and the second node, wherein: a first input of the feedback circuit is connected to a first output of the TIA; a second input of the feedback circuit is connected to a second output of the TIA; the second output of the feedback circuit is connected to a first input of the TIA.
Owner:SAMSUNG DISPLAY CO LTD
Area-efficient power detection subsystem for phased array transmitter
In some aspects, an apparatus may comprise multiple power coupling circuits that are each coupled between a respective power amplifier and a respective antenna element in a phased array, each power coupling circuit configured to generate a current proportional to an output power of the respective power amplifier. The apparatus may comprise a shared transimpedance amplifier (TIA) coupled to the multiple power coupling circuits, wherein the shared TIA comprises an input to receive, from the multiple power coupling circuits, the respective generated currents and an output to provide an analog signal indicating a value of the respective generated currents received from the multiple power coupling circuits. The apparatus may comprise an analog-to-digital converter (ADC) that comprises an input coupled to the output from the shared TIA and an output configured to provide a digital signal indicating the output powers from the power amplifiers. Numerous other aspects are described.
Owner:QUALCOMM INC
A quantum random number generator chip and design method
The present invention discloses a quantum random number generator chip and design method. The chip includes: an optical chip, a transimpedance amplifier chip, and a microcontroller chip connected in sequence, wherein: the optical chip includes a continuous laser, an optical beam splitter, a first optical attenuator, a second optical attenuator, a first photodetector, and a second photodetector; the microcontroller chip includes a first digital-to-analog converter, a second digital-to-analog converter, an analog-to-digital converter, and a processor; the transimpedance amplifier chip includes a transimpedance amplifier; wherein the optical chip, the transimpedance amplifier chip, and the microcontroller chip are packaged to obtain a quantum random number generator chip. The present invention packages the optical chip and the microcontroller chip into a single chip through a systematic packaging method, significantly reducing the size of the quantum random number system, greatly improving the stability of the system and structure, while reducing power consumption and cost, and expanding the scope and application scenarios.
Owner:UNIV OF SCI & TECH OF CHINA
Transimpedance amplifier with virtual ground shunt resistor
PendingUS20250300605A1Amplifier modifications to reduce detrimental impedenceRF amplifierWireless transmissionSoftware engineering
Methods and apparatus for amplifying a signal via an amplification circuit are described. An example amplification circuit generally includes an amplifier including an inverting input configured to receive a signal for wireless transmission. The amplification circuit also includes an impedance coupled between the inverting input and an output of the amplifier. The amplification circuit further includes a resistive element including (i) a first terminal coupled to the inverting input and (ii) a second terminal coupled to a reference potential node for the amplification circuit.
Owner:QUALCOMM INC
Wide-range switch tube leakage current detection method and system
ActiveCN121231973ACurrent/voltage measurementBase element modificationsDevice materialTransimpedance amplifier
The invention discloses a wide-range switch tube leakage current detection method and system, and relates to the technical field of semiconductor device detection, and the method comprises the steps: connecting a to-be-detected NMOS switch tube with a trans-impedance amplifier, and collecting the drain current; the trans-impedance amplifier converts drain current into an output voltage signal V. The switchable feedback resistor at least comprises two feedback branches corresponding to different ranges. When it is detected that the output voltage approaches a negative output saturation threshold, a corresponding gain range is switched; before each measurement period, an analog-to-digital converter is grounded through an analog switch, system offset voltage is sampled, and a digital compensation value of switch tube leakage current is calculated and compensated; rC low-pass filtering and software notch filtering are carried out on the compensated voltage signal, and then sampling is carried out; and comparing the sampling result with a preset threshold value, and outputting a leakage current detection result. According to the invention, the accuracy of the measurement result of the drain current of the NMOS transistor is improved, and the reliability of device performance evaluation is guaranteed.
Owner:BEIJING RUIHECHANG AEROSPACE TECH CO LTD
Optical interconnection simulation method and system based on full-link parameter optimization
ActiveCN120856233AElectromagnetic transmission optical aspectsElectromagnetic transmittersHemt circuitsTransimpedance amplifier
The invention discloses an optical interconnection simulation method and system based on full-link parameter optimization, and the method comprises the steps: processing an original signal based on a coding module, a first feed-forward equalizer and a continuous-time linear equalizer, and obtaining a to-be-processed electric signal; modulating and converting the to-be-processed electric signal into a to-be-sent optical signal through a driving circuit, and sending the to-be-sent optical signal through an optical channel; sensing a to-be-sent optical signal through a photodiode to obtain a to-be-received electric signal, and processing the to-be-received electric signal through a trans-impedance amplifier to obtain a to-be-recovered electric signal; and processing the electric signal to be recovered through an automatic gain control continuous time linear equalizer, a decision feedback equalizer and a second feed-forward equalizer to obtain a target receiving signal corresponding to the original signal. The problem of collaborative optimization of electric-optical-electric link distortion compensation and noise suppression in the high-speed optical interconnection system is solved, and the simulation precision is improved to the transmission scene verification requirement of single wave 200Gbps (the data rate of transmitting 200gigabit bit per second) or above.
Owner:SHANGHAI BOPU SEMICON TECH CO LTD
Complementary current-steering digital-to-analog converter
PendingUS20250337422A1Physical parameters compensation/preventionSoftware engineeringTransimpedance amplifier
A complementary current-steering digital-to-analog converter (DAC) including a p-type DAC as well as an n-type DAC is shown. The p-type DAC has p-type current sources, and the n-type DAC has n-type current sources. The p-type current sources are coupled to a first input terminal or a second input terminal of a transimpedance amplifier (TIA) according to a digital input of the complementary current-steering DAC. The n-type current sources are coupled to the first input terminal or the second input terminal of the TIA according to the digital input of the complementary current-steering digital-to-analog converter.
Owner:MEDIATEK INC
High-precision weak light detection or communication test system and test method
The invention discloses a high-precision weak light detection or communication test system, which comprises a laser power controller, a function generator, a transmitting end microcontroller, a shielding box, a source meter, an oscilloscope, a trans-impedance amplifier, a receiving end microcontroller and a computer, a laser light source, an attenuator, a standard device, a test device, a spectroscope, a screw rod, a first sliding table, a second sliding table and a stepping motor are arranged in the shielding box; the laser light source and the attenuator are fixed on the first sliding table, the spectroscope is fixed on the second sliding table, the first sliding table and the second sliding table are arranged on the lead screw, the lead screw is connected with the stepping motor, the attenuator and the stepping motor are connected with the transmitting end microcontroller, the standard device and the testing device are arranged on the side wall of the shielding box, and the attenuator is located between the laser light source and the spectroscope. The standard device is connected with the source meter, and the trans-impedance amplifier is connected with the receiving end microcontroller; the spectroscope is used for irradiating the laser beam on the test device and the standard device, and the shielding box is used for shielding electromagnetic interference and providing a darkroom environment.
Owner:SOUTH CHINA UNIV OF TECH
A design method of a multi-modal flexible sensor adaptive signal conditioning system
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.
Owner:王刚
Pulse wave signal detection-oriented transimpedance amplifier circuit with input voltage clamping and current offset functions
PendingCN121618942AAmplifier modifications to reduce noise influenceEvaluation of blood vesselsCircuit reliabilityHemt circuits
The invention discloses a pulse wave signal detection-oriented transimpedance amplifier circuit with input voltage clamping and current offset functions, and relates to the technical field of integrated circuit design, the pulse wave signal detection-oriented transimpedance amplifier circuit comprises a pseudo-differential structure, a current offset module and a photosensitive diode, the pseudo-differential structure is composed of two independent operational amplifiers with double-end input and single-end output, the trans-impedance amplifier of a pseudo-differential structure composed of two independent operational amplifiers with double-end input and single-end output is used, the same voltage is connected to the same-direction input end of the trans-impedance amplifier, voltage clamping is carried out on double-end input, the differential mode precision and low-frequency stability of an input virtual site are improved, differential mode imbalance and flicker noise caused by operational amplifier mismatch are eliminated, and the stability of the trans-impedance amplifier is improved. The dynamic range of the pulse wave detection system is improved, and the pulse wave detection system has the advantages of high-precision and wide-range ambient light suppression effect, high circuit reliability, low circuit complexity, easy implementation, high loop stability, small area and low power consumption.
Owner:CHONGQING UNIV
A control signal generating circuit, automatic gain control loop and TIA
ActiveCN114337641BGain controlLogic circuit coupling/interface arrangementsControl signalReference current
An embodiment of the present application discloses a control signal generating circuit, an automatic gain control loop, and a transimpedance amplifier (TIA), wherein the control signal generating circuit includes: a voltage-current conversion circuit, a current comparison circuit, and a voltage generating circuit; wherein the voltage-current conversion circuit is used to convert an input voltage signal to be controlled into its corresponding current signal to be controlled, and to convert an input reference voltage signal into its corresponding reference current signal; the current comparison circuit is used to compare the generated current signal to be controlled with the reference current signal to generate a difference current signal; and the voltage generating circuit is used to generate a voltage control signal based on the difference current signal.
Owner:WUHAN OPTICAL VALLEY INFORMATION OPTOELECTRONICS INNOVATION CENT CO LTD
Reception module, operation method thereof and user equipment
The invention provides a receiving module, an operation method thereof and user equipment using the receiving module. The receive module includes a plurality of IF paths associated with the plurality of RF paths, at least one multiplexer (MUX), and at least one power detector (PD). Each IF path includes a transimpedance amplifier (TIA) and a low pass filter (LPF). The LPF is coupled to an output of the TIA. The at least one multiplexer is coupled to the plurality of IF paths. At least one power detector (PD) selectively couples at least two of the IF paths through at least one multiplexer to alternately detect signal strength of respective nodes between the TIA and the LPF in the respective IF paths. The at least two IF paths are associated with at least two RF paths of the plurality of RF paths having the same carrier frequency.
Owner:MEDIATEK INC
A photoelectric receiving device for a grating displacement sensor
The present invention relates to a photoelectric receiving device for a grating displacement sensor. The device comprises a photodiode array, a differential selection switch network, a current differential circuit, and a transimpedance amplifier circuit. The differential selection switch network pairs the current signals output by the photodiode array and feeds them into the current differential circuit. The current differential circuit then takes the difference between each pair of current signals, each with a phase difference of π, and outputs the difference to the transimpedance amplifier circuit, which then amplifies the difference to produce a voltage signal for output. This invention expands the application range of photoelectric sensors, reduces the number of integrated component development steps, and improves the signal-to-noise ratio.
Owner:SUZHOU ALATOS MEASUREMENT TECH CO LTD
Circuit structure for realizing one-step solution of linear equation set based on memristor array
ActiveCN121765170BRealize signal transmissionImplement deploymentComplex mathematical operationsVoltage vectorIntegrator
The application belongs to the technical field of integrated circuits, and discloses a circuit structure for one-step solution of linear equations based on a memristor array, wherein the linear equations are Ax=b, and in the circuit, a first memristor array matrix operation core realizes mapping of the matrix A, takes a negative value of a first operation voltage vector as a bit line voltage, performs a matrix multiplication operation, reads a word line current as a first operation current vector after the operation, a bias mapping module maps b into a bias current vector, a current superposition module superimposes the first operation current vector and the bias current vector to generate a superimposed current vector, and converts the superimposed current vector into a second operation voltage vector through a transimpedance amplifier module, a second memristor array matrix operation core realizes mapping of the matrix A, takes the second operation voltage vector as a bit line voltage, performs a matrix multiplication operation, reads a word line current, and performs an integral operation on the word line current through an integrator module to obtain an updated first operation voltage vector. T The above hardware circuit can realize solution of the linear equations.
Owner:HUAZHONG UNIV OF SCI & TECH
Naked eye 3D virtual reality display system and method
The application is specifically a naked eye 3D virtual reality display system and method, and relates to the technical field of naked eye 3D display and virtual reality, comprising: a test pattern generation module; a photoelectric signal acquisition module; a signal phase analysis module; and a rendering parameter compensation module.In the application, the traditional external camera acquisition scheme is abandoned, a photosensitive sensor is attached to the inner side of a display module glass cover plate through optical glue, and a light shielding film and a frame wrapping design are matched, so that external environmental light can be isolated, signal distortion caused by environmental light reflection can be eliminated from the hardware structure; at the same time, a preprocessing circuit and the sensor are integrated at a zero distance, a tunable gain transimpedance amplifier band-pass filter is used to effectively filter out power frequency and high frequency noise, and a sinusoidal gray scale stripe design reduces spectral aliasing.
Owner:XIXIAN TECH CO LTD
Monitoring device, burning appliance and self-testing method
PendingGB2636446AElectronic circuit testingElectrical measurement instrument detailsTransimpedance amplifierVoltage source
A test electronics unit 20 for a flame monitoring device 12 comprising at least a transimpedance amplifier 18 and optical sensor 14. The unit being able to autonomously test the sensor and amplifier s
Owner:BOSCH THERMOTECHNOLOGY LTD (UK)