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273 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.
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
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
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
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
Voltage sensing device with micro-electro-mechanical element
The invention relates to a voltage sensing device with a micro-electro-mechanical element. The voltage sensing device comprises a micro-electro-mechanical sensing element, a transimpedance amplifying circuit and a differentiating circuit, the micro-electro-mechanical sensing element is used for sensing an input voltage to generate a sensing current. The transimpedance amplification circuit is connected to the output end of the micro-electro-mechanical sensing element to receive the sensing current and convert the sensing current into an amplification voltage. The differentiating circuit is connected to the transimpedance amplifying circuit and used for receiving the amplified voltage and differentiating the amplified voltage to generate a differential signal, and the differential signal indicates whether the input voltage has a sudden change state or not and indicates the time point when the input voltage suddenly changes.
Owner:IND TECH RES INST
Trans-impedance amplifier insensitive to high light intensity
ActiveCN120750318AAmplifiers controlled by lightDifferential amplifiersTransimpedance amplifierVoltage reference
The invention discloses a transimpedance amplifier insensitive to high light intensity, which comprises an input signal amplification structure and a double-end output structure which are connected with each other, the double-end output structure is also connected with a current bias structure, and the current bias structure is used for providing stable bias current irrelevant to a triode amplification coefficient for the input signal amplification structure. And under the condition that no signal is input, the output reference voltage is equal to the output voltage, and the input signal amplification structure is used for providing a corresponding amplification factor for a wide-range input signal. According to the transimpedance amplifier insensitive to high light intensity, under the condition that the light intensity is large, the triodes enter a saturation region, the output voltage is divided by the resistors and clamped at the lowest output voltage, and the output voltage is prevented from being lower than the common-mode input range of a post-amplifier; when the input optical signal disappears, that is, the output signal is strained to be a high level, the level jump speed is improved through the rapid discharge path.
Owner:SICHUAN HUIYUAN PLASTIC OPTICAL FIBER
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 method for manufacturing a micro-ring resonator-based activation function device
ActiveCN116151346BFinal product manufacturePhotomechanical exposure apparatusActivation functionTransimpedance amplifier
The application aims to provide a kind of micro-ring resonator-based activation function device manufacturing method, comprising the following steps: determining the standard nonlinear function to be fitted by optical device;Preparation of micro-ring resonator;Coupling ring PN junction and micro-ring;Set up auxiliary light source and output signal measurement equipment;Set up TIA transimpedance amplifier and bias unit.The application can realize the function of activation function by optical device, and it is relatively easy to combine with other optical elements that can realize the summation of neural unit weight, realize the complete function of single neuron, thereby improve the operation efficiency and operation accuracy of optical neural network.The device is small in size and easy to integrate, and the operation efficiency and operation accuracy of the optical neural network integrated by the neural unit integrated by the device can be significantly improved.
Owner:HARBIN ENG UNIV
Optical transceiving device, method and chip
An optical transceiving device (10), method and chip. The optical transceiving device (10) comprises: a silicon optical engine (110), which is used for receiving an external input optical signal by means of an optical receiving end, converting the input optical signal into a first electrical signal, converting a received second electrical signal into an output optical signal, and outputting the output optical signal by means of an optical output end; a transimpedance amplifier (120), which is used for acquiring the first electrical signal and amplifying the first electrical signal into the second electrical signal; and a substrate (130), which is used for carrying the silicon optical engine (110) and the transimpedance amplifier (120).
Owner:QIWEI TECHNOLOGY INVESTMENT (SHENZHEN) CO LTD
A low noise hybrid domain CMOS detector readout circuit and readout method
The present application relates to the field of integrated circuits and photoelectric detection technology, in particular to a low-noise hybrid domain CMOS detector readout circuit.The circuit includes a capacitance feedback transimpedance amplification unit, a switched capacitor reference unit, an analog domain readout unit, a time domain quantization unit and an output selection unit.The transimpedance amplification unit converts the pixel current into voltage.The switched capacitor reference unit filters out the reference voltage noise in the reset stage and maintains the reference potential in the integration stage.The analog domain readout unit outputs analog voltage, and the time domain quantization unit outputs digital time code through saturation time detection.The output selection unit defaults to output analog signal, and switches to digital output when the transimpedance amplifier output voltage reaches the preset threshold.The present application also provides a corresponding readout method.The present application can effectively filter out the reference voltage source noise and power supply ripple, significantly improve the signal-to-noise ratio of micro-light detection, realize high dynamic range in a single frame, significantly expand the linear response range of the detector, and can be integrated on chip.
Owner:SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
magnetic field sensor
PendingJP2025539382AAcceleration measurementMagnetic property measurementsTransimpedance amplifierPhotodiode
The differential detection system (1) includes an optically trapping diamond nitrogen-vacancy doped layer (2) with an adjacent microwave resonator (4) having a resonant frequency with an operating bandwidth around the magnetic resonance of the nitrogen vacancy center. The microwave resonator (4) includes a suppressed portion (4B) and an unsuppressed portion (4A). A sensor photodiode (6A) is positioned distal to the doped layer (2) and aligned with the unsuppressed portion (4A) of the microwave resonator (4). A reference photodiode (6B) is spaced from the sensor photodiode (6A) and is substantially coplanar with the sensor photodiode (6A), while also aligned with the unsuppressed portion (4A) of the microwave resonator (4). The sensor (6A) and reference photodiode (6B) are connected back-to-back to a single transimpedance amplifier.
Owner:THE UNIV OF SYDNEY
A wideband full-duplex receiver sharing interference cancellation circuitry
The present application belongs to the technical field of radio frequency microwave integrated circuit design, and specifically relates to a wideband full duplex receiver sharing an interference cancellation circuit. The full duplex receiver of the present application is composed of a receiver module and an interference cancellation circuit. The receiver comprises a transconductance, a mixer, a transimpedance amplifier and a frequency conversion loop. The interference cancellation circuit comprises an input matching network, an input down-mixer, a quadrature selection phase shifter and a baseband variable gain low-pass filter. The interference cancellation circuit transfers the adjustment of the delay and gain in the radio frequency domain to the baseband, so that the overall area and power consumption are small, and the delay amount of 3.86-8.33 ns can be realized in a wide radio frequency band of 0.5-3.5 GHz. Meanwhile, the interference cancellation circuit is synthesized by the mixer in the frequency conversion loop of the receiver to form a double-path cancellation mode, which avoids the interference cancellation circuit being directly connected to the front end of the receiver module, and the noise figure deterioration of the receiver module is very small, only 0.9-1.2 dB.
Owner:FUDAN UNIVERSITY
Wide dynamic range signal acquisition method and circuit
PendingCN121864068Aimprove accuracyQuantitative results are accurate and reliableMultiple input and output pulse circuitsComponent separationTarget signalSoftware engineering
The embodiment of the invention provides a wide dynamic range signal acquisition method and circuit, and the method comprises the steps: a quadrupole is connected with an ion receiving electrode, the ion receiving electrode is connected with a transimpedance amplifier circuit, the transimpedance amplifier circuit is connected with a threshold comparison circuit, the threshold comparison circuit is connected with a D trigger circuit, and the D trigger circuit is connected with a dead time correction circuit. The lower computer FPGA is connected with the D flip-flop circuit; the quadrupole is used for screening ion signal output; the ion receiving electrode is used for converting the ion signal into a current signal; the transimpedance amplifier is used for converting the current signal into a voltage signal; the threshold comparison circuit is used for turning the voltage signal into a logic level; the D flip-flop circuit is used for outputting a target signal level matched with the lower computer FPGA; and the lower computer FPGA is used for receiving the target signal level and counting the signals acquired by the plurality of pulses through the dead time correction circuit. In this way, the phenomenon of counting omission under high-frequency signals is reduced, and the counting accuracy is improved.
Owner:GUANGZHOU HEXIN INSTR CO LTD
Optical data signal receiver
PendingCN120856235AMultiplex system selection arrangementsGain controlControl signalSoftware engineering
The invention relates to an optical data signal receiver. An assembly for an electronic component for receiving data by using an optical fiber, where the data is received in burst form, and where the assembly comprises: a photodiode; a transimpedance amplifier coupled to the photodiode, where a gain of the transimpedance amplifier is adjusted based on a level of a gain control signal, and where the transimpedance amplifier comprises: a first amplifier; a network of electronic components exhibiting an impedance between two terminals, where one terminal of the network of electronic components exhibiting the impedance is coupled to an output of the first amplifier and another terminal of the network of electronic components exhibiting the impedance is coupled to an input of the first amplifier; and a receiving input signal sensor for sensing a receiving input signal level.
Owner:TOP INTEGRATED CIRCUITS LTD
Optical data signal receiver
PendingCN120856237AMultiplex system selection arrangementsGain controlControl signalSoftware engineering
The invention relates to an optical data signal receiver. An assembly for an electronic component for receiving data by using an optical fiber, where the data is received in burst form, and where the assembly comprises: a photodiode; a transimpedance amplifier coupled to the photodiode, wherein a gain of the transimpedance amplifier is adjusted based on a level of a gain control signal; a receive input signal sensor configured to sense a receive input signal level and provide the gain control signal, the gain control signal varying according to the receive input signal level, and wherein the receive input signal level is sensed via a sampling circuit arrangement; and a regulator for adjusting the low frequency behavior and the high frequency behavior of the comparator such that the detection of positive and negative data symbol level shifts in the received signal has the same behavior within acceptance engineering tolerances.
Owner:TOP INTEGRATED CIRCUITS LTD