232 results about "Analogue switch" patented technology

A chess-like piece positioning and recognition system, including: an MCU, an RFID module, multi-channel analog switches, an electromagnet and communication signal switch unit, an electromagnetic drive unit, antennas, silicon steel blocks, and pieces. The MCU is used for communication with the RFID module, selecting channels of the multi-channel analog switches, and electromagnet and communication signal switch selection. The RFID module is used for reading information from the pieces. The multi-channel analog switches are used for group gating and intra-group channel gating of the RF channels. The electromagnet and communication signal switch unit is used for switching between the electromagnetic drive unit and the RF channels. The electromagnetic drive unit is used for driving an electromagnet. The antenna is used for sending and receiving signals from the pieces and also serves as the coil for the electromagnet. The silicon steel block is used as the core of the electromagnet, which generates a magnetic attraction to the pieces after being magnetized.

The invention discloses a system reference clock frequency accuracy automatic calibration circuit and a calibration method thereof, and belongs to the technical field of frequency sources, the calibration circuit comprises a first crystal oscillator, a first power divider, a second power divider, a second crystal oscillator, an analog switch, a radio frequency switch, a detector, a comparator, an FPGA controller, a digital analog converter, an operational amplifier and a temperature sensor. When an external high-precision reference clock is accessed, the FPGA controller automatically switches a frequency measurement reference, performs high-precision frequency measurement on a 100MHz signal output by the first crystal oscillator, and judges whether calibration is needed or not according to frequency offset; if calibration is needed, the output voltage of the digital-to-analog converter is adjusted, the Vc end of the first crystal oscillator is controlled after operational amplification, and frequency closed-loop adjustment is achieved. According to the method, the crystal oscillator does not need to be disassembled, calibration is rapidly completed on site, and system availability and long-term frequency stability are remarkably improved.

The utility model relates to a circuit for avoiding train running data sharing storage duplex, and belongs to the technical field of train running data safety. According to the utility model, the analog switch is arranged to realize the switching between the memory and the equipment master control module and the external access module, and at most only one of the equipment master control module and the external access module can access the memory at the same time, so that the console is not networked through the equipment master control module; the problem of data leakage of the console connected with the external access module when the external access module and the equipment master control access the memory at the same time is avoided, and the data security is improved.

The embodiment of the invention relates to the technical field of vehicles, and discloses a hand-leaving detection system, a steering wheel assembly, a hand-leaving detection method and a vehicle, the hand-leaving detection system comprises a detection module, an amplifier, an analog switch chip and a first MCU chip; the detection module is configured to obtain a gesture capacitance signal and output the gesture capacitance signal to the amplifier; the analog switch chip is configured to respond to the starting of an auxiliary driving function, switch to a starting state, connect the output end of the amplifier with a path of the first MCU chip, and activate the first MCU chip; and in response to the closing of the auxiliary driving function, switching to a closed state, cutting off a path between the output end of the amplifier and the first MCU chip, and enabling the first MCU chip to sleep. According to the embodiment of the invention, the situation that the first MCU chip continuously generates heat to cause local heating of the steering wheel assembly can be prevented, and the user experience can be improved.

The invention relates to a high-throughput cell electric signal exporting device based on an analog switch, a cell impedance detection system and a detection method, and belongs to the technical field of biomedical detection equipment. The system achieves the functions of image observation and cell electric signal export at the same time, and is characterized in that a more complex circuit layout is achieved by using a smaller PCB size. According to the system, by integrating temperature control and electric signal conduction, the function of an existing microscope is utilized, electric signal conduction is completed, and a brand new technical scheme is provided for biological experiments such as analysis of the growth state, the adhesion degree and the migration ability of cells.

The invention discloses an extensible three-dimensional electrical impedance imaging electrode array device, and belongs to the technical field of biomedical measurement. The device comprises a two-dimensional electrode interface module which is connected with original two-dimensional equipment through a series input and expansion interface; the three-dimensional common electrode array comprises a plurality of groups of electrodes at different horizontal layers; the input end of the three-dimensional electrode control module is connected to the two-dimensional electrode interface module, and the output end of the three-dimensional electrode control module is connected to the three-dimensional common electrode array. The control module comprises an electrode array control connector which is connected in parallel and an isolation type analog switch unit of a multi-stage series analog switch structure. By sending a control signal to the control connector, all electrode channels on a certain layer in the three-dimensional electrode array are uniformly gated, and original two-dimensional measurement is mapped to a three-dimensional space. According to the invention, three-dimensional measurement can be realized without changing the original equipment, the number of vertical layers expanded by serial connection of interfaces is supported, the number of horizontal electrodes expanded by parallel connection is controlled, and high compatibility, high expansibility and excellent signal isolation capability are realized.

Analog switch circuit, control circuit and control method thereof. The analog switch circuit includes a switch unit and a control circuit. The control circuit includes a sensing circuit and a gate-source voltage adjusting circuit. The switch unit is used to operate a first switch therein according to a first gate-source voltage to convert an input signal at an input terminal into an output signal at an output terminal. The sensing circuit is coupled between the input terminal and the output terminal and is used to generate a sensing signal according to a voltage difference between the output signal and the input signal. The gate-source voltage adjusting circuit is coupled with the sensing circuit and is used to adaptively adjust the first gate-source voltage according to the sensing signal so that a channel resistance of the switch unit remains at a fixed value when the voltage difference changes.

The invention discloses a network communication module, a communication method and a communication system, and belongs to the technical field of communication equipment. The network communication module comprises a control module and an audio module connected with the control module; the first analog switch is provided with a first transmission channel and a second transmission channel, and the first transmission channel is connected with the third transmission channel of the second analog switch; the second transmission channel is connected with an encryption module, and the encryption module is connected with a fourth transmission channel of the second analog switch; the network inlet is connected with the control module, and the network outlet is connected with the second analog switch. The network communication module provided by the invention has two independent transmission lines, and the control module can control the audio information to be encrypted and transmitted through the first analog switch and the encryption module to the second analog switch, and also can control the audio information to be transparently transmitted through the first analog switch to the second analog switch; switching of two voice modes of a common mode and an encryption mode is achieved, and different transmission scene requirements are met.

The application discloses a display device and a quality compensation driving method thereof. The display device comprises a first substrate and a second substrate arranged oppositely, a plurality of source lines, a plurality of gate lines, a plurality of pixel units defined by the intersection of the source lines and the gate lines, and at least one analog pixel unit arranged outside a display area on the first substrate; the second substrate is provided with a plurality of common electrode lines extending along the direction of the gate lines, and each common electrode line corresponds to a row of pixel units. The analog pixel unit comprises an analog switch element and an analog pixel electrode, the control end of the analog switch element is electrically connected with the gate line, the first end is electrically connected with the source line, the second end is electrically connected with the analog pixel electrode, and the analog pixel electrode is electrically connected with the corresponding common electrode line on the second substrate through a conductive connecting piece. The display device and the quality compensation driving method thereof fundamentally solve the display unevenness problem caused by RC delay, are simple in structure and do not increase additional cost.

The invention discloses a trusted start control method for a modular separation design embedded system, the embedded system comprises a core board and a special bottom board, the core board is integrated with a processor and a first BIOS, and the special bottom board is integrated with a trusted computing module, a second BIOS, an analog switch and a chip selection controller; the method comprises the following steps that after the embedded system is powered on, the trusted computing module prevents the processor from being started through a control signal, and the analog switch is controlled to switch a data path of the second BIOS to the trusted computing module; the trusted computing module reads the boot firmware in the second BIOS for trusted measurement, if measurement succeeds, the analog switch is controlled to switch a data path of the second BIOS to the processor, and the processor is allowed to be started; if the measurement fails, the processor is continuously prevented from being started. According to the method provided by the embodiment of the invention, the trusted root is preferentially started and actively measures the boot firmware, the code executed by the processor is ensured to be trusted, and a trust chain is established from the source.

The invention belongs to the field of semiconductor lasers, and provides a semiconductor laser diode driving circuit and a driving method. Comprising a single-pole multi-throw analog switch, a power triode driving circuit, a constant current mode feedback loop, a constant voltage mode feedback loop, a constant power mode feedback loop and an incoherent control circuit. The power triode driving circuit comprises a controller, a digital-to-analog converter, a power triode Q1, an integrator circuit based on an operational amplifier, a voltage source VCC, a laser diode V1 and a power resistor R2; the single-pole multi-throw analog switch is connected with the controller, and the controller controls the digital-to-analog converter; the single-pole multi-throw analog switch is respectively connected with the constant current mode feedback loop, the constant voltage mode feedback loop and the constant power mode feedback loop, and switching control of a constant current mode, a constant voltage mode and a constant power mode is realized through channel opening and closing of the single-pole multi-throw analog switch. According to the invention, the defects of single working mode, lack of coherence regulation and control capability and insufficient digitization degree in the prior art are overcome.

The present application belongs to the technical field of current source control, and particularly relates to a self-adaptive intelligent current source output control method, comprising: obtaining, by a load detection module, a state voltage signal of whether a load exists and its basic characteristics; inputting the state voltage signal into a state stabilization filtering module to extract a load characteristic signal in a stable working state; inputting the load characteristic signal into a feedback calculation module, analyzing and operating the load characteristic signal according to a preset algorithm model to generate a feedback control parameter; inputting the feedback control parameter into an analog switch control module, selecting an input channel of a resistance voltage division network according to the feedback control parameter, and then outputting a current source regulation signal VC; and inputting the current source regulation signal VC into an adjustable current source module to adjust an output current according to the current source regulation signal VC to meet the load requirements. The present application can be used to solve the problems of slow response, low regulation accuracy and poor adaptability of the current source under complex load conditions in the prior art.

The invention discloses a turbidity detection method and device based on an intelligent sensing technology, and the method comprises the following steps: step 1, original signal collection and noise preprocessing, step 2, automatic range switching judgment and hardware path switching, step 3, intelligent multi-dimensional error compensation, and step 4, data linearization conversion. The method comprises the following steps: carrying out automatic range switching judgment and hardware channel switching, carrying out hysteresis threshold judgment, then controlling an analog switch / light path to switch a corresponding detection module through a microcontroller, and synchronously adjusting AD sampling gain, so that measurement switching in various environments can be realized, and the turbidity detection accuracy is improved; temperature compensation, light source drift compensation and bubble interference compensation can be carried out on the acquired signals through intelligent multi-dimensional error compensation, and the accuracy of signal detection is improved.

A microphone assembly includes a microphone array and a mixer. The microphone array includes first, second, and third microphones. The mixer includes an analog switch assembly and an amplifier assembly configured to mix recording signals of the microphones in different manners to realize different recording patterns of the microphone array. The different recording patterns realizable by the microphone array may include the cardioid pattern, the omnidirectional pattern, the stereo pattern, and the bidirectional pattern.

The application provides a lens aging test device and method. The device comprises a main control unit, a plurality of lens bayonet connectors and a plurality of lens bayonet connectors. The main control unit controls the plurality of lens bayonet connectors through a multi-channel analog switch unit. One lens bayonet connector controls the power supply of one lens to be tested, realizes the control of the plurality of lenses to be tested for aging test, and realizes the centralized control of the plurality of lenses to be tested by the cooperation of the main control unit and the multi-channel analog switch unit. The plurality of lenses to be tested are tested in parallel or polling, the test efficiency is significantly improved, the circuit structure is simplified, and the test cost is reduced. The method comprises the following steps: collecting a plurality of lens image data connected to the lens to be tested by the lens aging device; adopting a frame difference method combined with an edge detection algorithm to analyze the plurality of continuous lens image data; judging whether the lens to be tested is abnormal; if the lens to be tested is normal, the lens aging device enters the test of the next lens to be tested; and if the lens to be tested is abnormal, an abnormal alarm is sent and fed back to the upper computer.

A high-speed pulse sampling circuit, including pulse level control circuit, chip oscillator U1, analog switch U3, charging circuit, follow-up circuit one, switch on duration control circuit; pulse level control circuit, high-speed pulse input by pulse input end SG_IN is handled and high level pulse signal M is exported; chip oscillator U1, and the output of pulse level control circuit is electrically connected, high level pulse signal M is handled and high level pulse signal Q is exported; analog switch U3, its input and the output of chip oscillator U1 are electrically connected, and high level pulse signal Q controls conduction; the capacitor C5 that is connected with the output of analog switch U3 is provided in charging circuit, and capacitor C5 is also electrically connected with A / D converter through follow-up circuit one;Switch on duration control circuit is used to control the conduction duration of analog switch U3.The present application has solved the problem of high-speed pulse sampling, and the hardware equipment involved in the sampling circuit is relatively inexpensive.

The utility model discloses a communication circuit which comprises a half-duplex communication chip, an MCU, a first analog switch, a second analog switch, a sending control circuit and a receiving control circuit. The TX / RX end of the half-duplex communication chip is connected with one end of the first analog switch and one end of the second analog switch. The other end of the first analog switch is connected with one end of the sending control circuit, and the other end of the sending control circuit is used as a TX end connected with a communication device; the other end of the second analog switch is connected with one end of the receiving control circuit, and the other end of the receiving control circuit is used as an RX end connected with a communication device; the selection signal output end of the MCU is connected with the control end of the first analog switch and the control end of the second analog switch. A selection signal generated by the MCU controls one of the first analog switch and the second analog switch to be switched on. According to the utility model, the flexible switching of the receiving and transmitting modes is realized based on the analog switch, the convenience of communication mode switching is improved, and the compatibility of sensors with different communication modes is greatly enhanced.

The application provides a power switching system, method and device for electromagnetic transient real-time simulation, the system comprising: an equivalent switch and a processing module; the equivalent switch comprising: a controlled voltage source and a controlled current source; the processing module being connected with the voltage source, the current source and a power source for electromagnetic transient real-time simulation respectively; the processing module being used for collecting original switch signals, three-phase currents output by the voltage source, three-phase voltages input by the current source and three-phase power voltages of the power source; determining three-phase current signals corresponding to the current source and three-phase voltage signals corresponding to the voltage source according to the original switch signals, the three-phase currents, the three-phase voltages and the three-phase power voltages; and completing the switching of the power source for electromagnetic transient real-time simulation according to the three-phase current signals and the three-phase voltage signals. The application can ensure the normal operation of the electromagnetic transient real-time simulation and improve the allowed electromagnetic transient real-time simulation scale by simulating the switch element.

The invention belongs to the technical field of communication equipment safety protection, and discloses a telephone anti-monitoring system based on a Hall sensor, which comprises a main control CPU (Central Processing Unit), a microphone, a handle on-hook detection circuit and a permanent magnet arranged in a telephone handle, an analog switch module is connected in series between the master control CPU and the microphone, and the output end of the Hall sensor is directly connected to the control end of the analog switch module to form a hardware control loop independent of the master control CPU; and the output end of the Hall sensor module is also connected with the handle on-hook detection circuit. The system is completely composed of hardware and is independent of a software system of the main control CPU, so that the possibility of remotely starting monitoring through software vulnerabilities is fundamentally eradicated; original software programs of the telephone set do not need to be modified, and the telephone set is realized only through hardware circuit modification and is adaptive to most wired telephone sets with handles in the market.

The invention relates to an on-line self-adaptive health detection system and method for initiating explosive devices of an agile aircraft, and belongs to the technical field of on-line detection of spaceflight electronic systems. Comprising a constant current source, an integrated computing power center, a reusable detection link and an ignition loop, wherein the integrated computing power center comprises a sequential logic control algorithm module and a data estimation module; the reusable detection link comprises an analog switch 1, an isolation optocoupler, a multi-choice analog switch, a voltage following module, an isolation operational amplifier module, a differential operational amplifier module and an AD acquisition module; the ignition loop comprises an initiating explosive device to be detected; according to the invention, the problems of poor precision, complex hardware, low test efficiency and the like of a traditional single-path voltage measurement method are solved, and the test coverage, safety and application reliability of the agile aircraft are improved.

The application provides a high-isolation T-type analog switch and a control circuit thereof, wherein: the input end of a first-stage delay module is coupled with a control signal of a system, the output end of the first-stage delay module is coupled with the input end of a second-stage delay module and the input end of a third set of inverting circuits, the output end of the third set of inverting circuits is coupled with the first input end of a circuit or the output end of the circuit outputs a first control signal, and the first control signal is output as a second control signal after passing through a first set of inverting circuits; the output end of the second-stage delay module is respectively coupled with the input end of a third-stage delay module and the input end of a fourth set of inverting circuits; the output end of the third-stage delay module is coupled with the input end of a second set of inverting circuits, the output end of the third-stage delay module outputs a third control signal, and the second set of inverting circuits is coupled with the second input end of the circuit; and the output end of the fourth set of inverting circuits outputs a fourth control signal. The control circuit of the application can avoid the occurrence of leakage during the switching process of the T-type analog switch circuit.

The present application belongs to the technical field of switch cabinet operation and maintenance simulation, and particularly relates to a switch cabinet fault simulation training and examination system and method, comprising a touch liquid crystal screen, a main control cabinet, a drawer, a fault simulation cabinet, a control signal input and output cabinet and a plurality of data lines; the fault simulation cabinet is connected with the main control cabinet through the data lines, and the fault simulation cabinet is arranged on the top of the main control cabinet; a power supply cabinet is connected to one side of the main control cabinet, and the top of the power supply cabinet is provided with the drawer; the rear side of the main control cabinet is connected with the control signal input and output cabinet; and the fault simulation cabinet is connected with the touch liquid crystal screen through the data lines. The present application combines the complex electrical primary system diagram with the entity cabinet, can simulate the practical operation and explanation, realizes the "visualization" training of the switch cabinet electrical primary system principle diagram, and solves the problem of the poor training effect of the current switch cabinet electrical primary system practical operation training which is based on the theory training and auxiliary on-site partial understanding learning.

The invention provides a bio-electricity signal and electrode impedance acquisition system and method, and relates to the technical field of bio-electricity signal acquisition and processing. According to the specific technical scheme, the integrated bio-electricity signal acquisition chip is used for generating an alternating current excitation signal with a specific frequency and a fixed amplitude through an internally integrated excitation source; continuously applying an alternating current excitation signal to one or more target electrodes through an internal analog switch array; the integrated bio-electricity signal acquisition chip is used for acquiring a mixed digital signal from a target electrode, and the mixed digital signal is formed by superposing a bio-electricity signal, a noise signal and an impedance response signal generated by an alternating current excitation signal on target electrode impedance; and the microcontroller unit is used for extracting electrode impedance information from the mixed digital signal and recovering the bio-electricity signal.

A sleep mode awakening switch provides a very quick signal to awaken a key's analog sensor from sleep mode with very little movement of the key by a user. This is accomplished using a controlled short distance between a stopper for a spring contact of the switch and a fixed contact of the switch. A protrusion on a key stem lifts the spring contact up to the stopper, with the stopper controlling the travel distance to flip the switch upon a key press.

The invention discloses a low-power-consumption quick start awakening method for an acquisition terminal. According to the scheme, the acquisition terminal comprises a main control module, an auxiliary control module and a power supply switching circuit, and a rechargeable low-leakage-current battery capacitor is adopted as a standby power supply; during normal power-on, the terminal is powered by the main power module, the main control module works in a high-performance mode, the clock module and the liquid crystal screen module are switched to the main control module through the multi-channel analog switch, and the auxiliary control module performs voltage sampling of the main power supply and the standby power supply and charging control of the standby power supply. The main control module and the auxiliary control module are simultaneously communicated with the metering chip to read data; when the power-off key is awakened, the multi-channel analog switch is switched to the auxiliary control module, and only a few modules such as the auxiliary control module work. Through cooperation of the main power module, the standby power module, the power supply switching circuit and the like, the problems of long key wakeup starting time, high power consumption and low data reading efficiency are solved, and rapid key wakeup starting, low power consumption and improvement of the data reading efficiency of the acquisition terminal are realized.

A microphone assembly includes a microphone array and a mixer. The microphone array includes first, second, and third microphones. The mixer includes an analog switch assembly and an amplifier assembly configured to mix recording signals of the microphones in different manners to realize different recording patterns of the microphone array. The different recording patterns realizable by the microphone array may include the cardioid pattern, the omnidirectional pattern, the stereo pattern, and the bidirectional pattern.

This application discloses a wide-range leakage current detection method and system for switching transistors, relating to the field of semiconductor device testing technology. The method includes connecting the NMOS switching transistor under test to a transimpedance amplifier to acquire its drain current; the transimpedance amplifier converts the drain current into an output voltage signal V; the switchable feedback resistor includes at least two feedback branches corresponding to different measurement ranges; when the output voltage approaches a negative output saturation threshold, the corresponding gain range is switched; before each measurement cycle, the analog-to-digital converter is grounded via an analog switch, the system offset voltage is sampled, and a digital compensation value for the switching transistor's leakage current is calculated and compensated; the compensated voltage signal is subjected to RC low-pass filtering and software notch filtering before sampling; the sampling result is compared with a preset threshold, and the leakage current detection result is output. This application improves the accuracy of NMOS transistor drain current measurement results and ensures the reliability of device performance evaluation.

A system and method for automatically detecting a type of memory card inserted into a portable computing device. The system may include a system on chip capable of detecting a first type of memory card and a second type of memory card. For this detection, the system on chip does not have / does not use an analog switch. The first memory card may be a secure digital express memory card. Meanwhile, the second memory card may be a secure digital memory card. The system on chip may include a general purpose input / output pin. The general purpose input / output pin may activate a first communication bus protocol associated with the secure digital express memory card in response to receiving a first signal. The first signal may be generated by a reserved for future use pin on the first type of memory card.

The application discloses a kind of test system and method for analog switch, it is related to electrical performance test technical field, including test control unit, coordinate each module work, parse instruction generation control signal, monitor test state and output result;Analog switch unit, adapt to multiple types of switch, can set on-off frequency and other key parameters restore working characteristic;Signal generation unit, generate a variety of adjustable electrical signal to meet different test requirements;Data acquisition unit, collect on-off response time and other electrical parameters;Fault injection unit, simulate a variety of common fault scenarios;Data analysis unit, process raw data to evaluate switch performance;Communication interaction unit, interact with external equipment data reception configuration instruction.The application adapts to multiple types of switch, test precision is high and anti-interference ability is strong, supports multi-environment test;Improve test efficiency and data reliability, adapt to electronic manufacturing, power operation and other multi-field applications.

The invention relates to the technical field of electrophysiological signal recording and stimulation of cerebral neurons, in particular to a distributed electrophysiological signal recording and stimulation system for cerebral neurons. The system comprises a recording path and a stimulation path, wherein the recording path is composed of an analog switch, a multi-stage cascade amplifier, a plurality of analog-to-digital converters, an FPGA main control board and a computer, and electrophysiological signals are collected and uploaded; the stimulation channel is composed of the computer, the FPGA main control board, a digital-to-analog converter and the analog switch and is used for issuing an electrical stimulation signal; wherein the amplifier, the converter and the power supply module are integrated on an independent PCB (Printed Circuit Board) and are connected with the FPGA main control board through an FMC (Frequency Management Controller) interface. The system configures the oversampling multiplying power of the analog-to-digital converter through the FPGA main control board so as to optimize the actual sampling rate and the signal-to-noise ratio. According to the invention, integration of acquisition and stimulation functions, hardware modularization and dynamic adjustment of signal quality are realized, and the flexibility and signal fidelity of the system are improved.