772 results about "Variable resistance" patented technology

The invention relates to the technical field of photovoltaic cells, and discloses a method for improving laser-assisted sintering contact uniformity and a processing device. The method comprises the steps that a probe presses a main grid of a first area on the front face of a battery piece, first laser power is used for scanning a second area on the front face of the battery piece in a laser scanning mode in the fine grid direction, first reverse bias voltage is applied to the battery piece, and a variable resistor adjusts the resistance value of the variable resistor according to the distance between scanning point positions and the probe so as to balance the bias voltage difference of different scanning point positions; performing laser-assisted sintering on the second area; the probe presses a main grid of a second area on the front face of the battery piece, laser scanning is conducted on a first area on the front face of the battery piece in the fine grid direction through second laser power, second reverse bias voltage is applied to the battery piece, the resistance value of the variable resistance piece is adjusted according to the distance between the scanning point position and the probe, and laser-assisted sintering of the first area is completed. According to the method, the bias voltage difference of different scanning point positions can be balanced, the interface contact difference of different areas can be balanced, and the battery performance and effect can be improved.

A semiconductor device may include: a first conductive line including an opening passing through the first conductive line; a second conductive line disposed over the first conductive line and spaced apart from the first conductive line; a first electrode layer buried in the opening; a selector layer disposed in the opening and surrounding side surfaces of the first electrode layer; and a variable resistance layer disposed over the selector layer and the first electrode layer.

The present disclosure provides a receiver front-end circuit including: first and second input units that alternately operate according to a common mode voltage of a differential input signal and output a differential output signal; a variable resistance unit that adjusts a differential load resistance supplied to the differential output signal according to the variable resistance control signal; and a control unit generating a variable resistance control signal according to a common mode voltage of the differential input signal. According to the receiver front-end circuit disclosed by the invention, the receiving of the differential input signal with a wider common-mode voltage range can be realized under low power supply voltage, and the output amplitude of the generated differential output signal does not change greatly along with the change of the common-mode voltage of the differential input signal; therefore, the compatibility of the receiver is improved, and the power consumption is reduced.

A semiconductor device may include: a plurality of word lines extending in a first direction; a plurality of bit lines extending in a second direction, a plurality of memory cells disposed at intersections of the plurality of word lines and the plurality of bit lines, respectively, each memory cell structured to include a variable resistance element configured to store data by exhibiting different resistance values and a selection element connected to the variable resistance element in series to selectively connect or disconnect the variable resistance element to the pair of the corresponding bit line and word line; and a boosting line connected to a portion of the selection element that is between one end of the selection element, which is connected to one of the word line and the bit line, and another end of the selection element, which is connected to the variable resistance element.

A wearable device comprising a transmitter coil having variable transmission resistance, a first transmission impedance, and a second transmission impedance; an implanted device, comprising a receiver coil having a variable reception resistance, a first reception impedance, and a second reception impedance; wherein the transmitter coil can wirelessly transmit information over a variable frequency to the receiver coil when the variable resistance of the transmitter coil is tuned to the variable resistance of the receiver coil, the transmitter coil is configured to the first transmission impedance, and the receiver coil is configured to the first reception impedance; wherein the transmitter coil can wirelessly transmit power to the receiver coil when the transmitter coil is configured to the second transmission impedance and the receiver coil is configured to the second reception impedance; and wherein the transmitter coil can wirelessly transmit to the receiver coil of the implanted device using a magnetoquasistatic field.

A sliding bearing dynamic load measuring method belongs to the technical field of mechanical transmission. In order to solve the problems of low accuracy and low precision of the existing dynamic load measurement of the bearing, the method comprises the following steps of: measuring a bearing load value of a calibration point by adopting a loading measurement calibration device, and fitting the bearing load value into a voltage-load calibration curve; the resistance strain gauge is arranged at the stress sensitive position of the bearing seat, and when the resistance strain gauge generates a variable resistance value due to the deformation of the bearing seat, the strain bridge outputs a voltage signal; and according to a voltage signal output by the strain bridge, a corresponding load value, namely a dynamic load measurement value, is obtained in a voltage-load calibration curve. The device is used for carrying out load measurement on the bearing.

The invention discloses a resonance elimination circuit, method and device, and relates to the technical field of circuits, and the circuit comprises a controller, a resonance elimination resistor and a switching circuit. Two ends of the resonance elimination resistor are respectively connected with the neutral point of the voltage transformer and the ground. The controller controls the switching circuit to be switched off when ferromagnetic resonance is detected, so that the resonance elimination resistor is connected to suppress resonance; after the fault disappears, the control switch is switched on, and the neutral point is directly grounded. The controller compares the neutral point current with a first threshold value to determine resonance generation, and determines fault disappearance when the current is smaller than a second threshold value. And when the resonance elimination resistor is a variable resistor, the controller adjusts the resistance value according to the current change rate and a pre-learned mapping relation. The switching circuit can adopt a switching tube or a relay, and the controller realizes switching by controlling the switching tube to be turned off or a relay coil to be powered off. The circuit can rapidly suppress ferromagnetic resonance, guarantee system stability and improve fault processing efficiency.

The invention discloses a device and a method for measuring the velocity field of an autoclave through hot-pressing wind speed. The device comprises a thermosensitive probe, a Wheatstone bridge, a lock-in amplifier, an NI multi-channel data acquisition card and a computer, the thermosensitive probe is used for instantaneously detecting the temperature of a placement point position and generating resistance fluctuation based on sensing temperature change; the Wheatstone bridge is formed by connecting a fixed resistor, a variable resistor and a thermosensitive probe, and is used for forming a series circuit with the lock-in amplifier; the lock-in amplifier is used for supplying power to the Wheatstone bridge and providing co-frequency voltage at the same time, so that resistance data of a thermosensitive probe in the Wheatstone bridge is converted into voltage data to be output; the NI multi-channel data acquisition card is used for acquiring in-phase component voltage signals output by the lock-in amplifier; the computer is used for processing the voltage data to obtain the average speed and the pulsation speed of the measurement point. According to the invention, the problems of limited precision, insufficient sensitivity and poor adaptability to the internal environment of the autoclave in the conventional gas speed measurement method are solved.

A multiply and accumulate calculation device including a variable resistor array unit having a plurality of variable resistance elements, a reference array unit having a reference resistance element having a fixed resistance value, a signal input unit that generates an input signal from input data, and inputs the input signal to the variable and reference resistance elements, a first detection unit that detects a current flowing through the variable resistor array unit, based on the input signal applied to the variable resistance elements, a second detection unit that detects a current flowing through the reference array unit, based on the input signal applied to the reference resistance element, and a correction calculation unit that performs a predetermined calculation on the output from the first detection unit, based on the output from the second.

A gate driver system for a multi-phase inverter includes a gate controller, a gate driver circuit, and a hybrid switch power module integrated into a phase leg of the multi-phase inverter. The hybrid switch power module includes a first semiconductor switch connected in parallel with a second semiconductor switch. The first semiconductor switch has first conduction characteristics, while the second semiconductor switch has second performance characteristics. The gate driver circuit includes a gate driver, a first variable resistance circuit, and a second variable resistance circuit. The first variable resistance circuit is powered by a first low-voltage DC power bus, while the second variable resistance circuit is powered by a second low-voltage DC power bus.The first variable resistance circuit is connected to a first gate of the first semiconductor switch, while the second variable resistance circuit is connected to a second gate of the second semiconductor switch.

The embodiment of the invention provides a signal processing circuit and an integrated circuit. The signal processing circuit includes: a first amplification branch including a first operational amplifier and a first resistance network connected to the first operational amplifier; a detection branch coupled to an input of the first amplification branch, the detection branch comprising a variable resistor and configured to detect a common mode component input to the first amplification branch and generate a compensation signal based on the common mode component and a resistance value of the variable resistor; and an adjustment branch coupled between the detection branch and the first amplification branch and configured to adjust the compensation signal and apply the adjusted signal to the first amplification branch to reduce an input deviation of the first operational amplifier, the input deviation being associated with a resistance mismatch and a common mode component of the first resistance network.

A semiconductor device may include: a first conductive line; a second conductive line disposed over the first conductive line to be spaced apart from the first conductive line; a variable resistance layer disposed over the first conductive line and below the second conductive line; at least one of a first dielectric layer or a second dielectric layer; at least one of a first contact or a second contact; and at least one of a first doped selector layer or a second doped selector layer.

The invention discloses a high-side driving circuit, an electronic device, a vehicle and a control method. False triggering of a short-circuit protection mechanism is avoided. The high-side driving circuit comprises a power distribution circuit, a sampling circuit and a fault protection circuit, the power distribution circuit comprises a PMOS transistor and a first resistance circuit; the grid electrode of the PMOS tube is grounded through the first resistance circuit, the drain electrode of the PMOS tube is connected with a load, and the source electrode of the PMOS tube and the input end of the fault protection circuit are connected with a power supply; the output end of the fault protection circuit is connected with the grid electrode of the PMOS tube; the sampling circuit is connected with the drain electrode of the PMOS tube and the ground; the output end of the sampling circuit and the control end of the fault protection circuit are connected to the control unit; the control unit judges whether load short circuit occurs or not according to the sampling voltage, if not, the fault protection circuit is forbidden to output voltage, and if yes, the fault protection circuit is controlled to convert input voltage into target voltage to be output; the PMOS tube is in a variable resistance region when the fault protection circuit has no voltage output, and enters a cut-off region when the PMOS tube outputs a target voltage.

The invention discloses a communication system and a communication device. The communication system comprises a bus, a resistor module, a temperature sensor and a controller. And the bus is connected with the equipment. The resistance module is disposed on a communication line between the bus and the device, the resistance module including a variable resistor. The temperature sensor is used for detecting the temperature of the resistor module. The controller determines the current resistance value of the resistor module based on the temperature detected by the temperature sensor so as to adjust the resistance value of the variable resistor, so that the resistance of the bus is consistent with the resistance of the communication line. Therefore, the communication system can automatically adjust the resistance value of the variable resistor according to the change of the ambient temperature to achieve impedance matching, thereby avoiding oscillation of signals in a bus and a communication line, further improving the communication reliability of the communication system, and ensuring the normal operation of the communication system.

The invention provides a self-adaptive ripple suppression circuit based on an MOSFET, and relates to the technical field of electronic circuits. The circuit comprises an input alternating current end EMC filtering surge protection circuit, a rectification circuit, an absorption protection filtering circuit, a clamping absorption circuit, a detection protection circuit, a control circuit, a power follow current circuit, an output filtering circuit, a stroboflash removing circuit and an LED load circuit which are connected in sequence. Under the condition that the MOSFET self-adaptive ripple suppression circuit is in a working state, voltage at the two ends of the sampling resistor is fed back to a grid electrode and a source electrode of the MOS tube, on-resistance of the MOS tube is adjusted through change of the sampling voltage on the basis of the characteristic that the MOS tube works in a variable resistance area, and output current ripples are dynamically suppressed. The circuit has excellent adaptive capacity, can dynamically suppress output current ripples in a wide load range through a simple simulation negative feedback loop, and is quick in response.

Embodiments of the present application relate to the technical field of circuits, and provide a boost circuit and an electronic device, which can solve the problem of a device being easily damaged in a surge voltage scenario. The boost circuit comprises: a first inductor and a second inductor; at least two first switch transistors, which are sequentially connected in series between a second end of the second inductor and a positive electrode of a busbar; at least two second switch transistors, which are sequentially connected in series between the second end of the second inductor and a negative electrode of the busbar; and a first capacitor which is electrically connected between a first node and a corresponding second node. At least one of the at least two first switch transistors and the at least two second switch transistors is connected in parallel with a corresponding variable resistor device, the variable resistor device being a device which changes from a high resistance state to a conducting state when the voltage difference between two ends exceeds a voltage threshold. The at least two first switch transistors and the at least two second switch transistors are used for cutting off when a current on the first inductor exceeds a current threshold.

The invention discloses an impedance matching method and system for chip testing, electronic equipment and a medium, and relates to the technical field of data processing. The method comprises the following steps: establishing electrical connection between a test probe and a to-be-tested chip test point, and sending a preset detection signal; acquiring incident power and reflection power of the detection signal; calculating a first signal reflection coefficient based on the incident power and the reflection power, and determining an impedance deviation value and an adjustment direction according to a difference value between the first signal reflection coefficient and a preset standard reflection coefficient; determining a parameter adjustment step length according to the impedance deviation value; sequentially adjusting a variable resistor, a variable capacitor and a variable inductor in the impedance matching network according to the step length and the adjusting direction; detecting a second signal reflection coefficient when the impedance real part and imaginary part of the variable element reach the target range; and judging whether the second signal reflection coefficient converges to a preset range, and if yes, taking the current matching network parameter as an impedance matching result. By implementing the technical scheme provided by the invention, the impedance matching accuracy of the chip test can be improved.

Circuits and methods include amplification circuitry coupled to a plurality of input signal paths and an output signal path and a unified signal path combining a feedback path couplable between a feedback node in the output signal path and the input signal path via a plurality of input switches and a passive gain path couplable between the feedback node in the output signal path and one or more input signal paths through the input switch. The circuit may include a first capacitor and a variable resistor coupled in series and a second capacitor coupled in series with a feedback path switch and a power supply rejection resistor. The passive gain path may further include a shunt switch coupled in series between a plurality of bypass switches to form a T-switch. A fast charging switch may be configurable to couple a second capacitor to a reference potential during a state change of the unified signal path.

A resistance exercise system having, in certain embodiments, a DC power supply system, a DC motor connected to the DC power supply system, a drive section connected to a drive element, a resistance delivery element connected to the drive element, and an extractable exercise resistance delivery section, a predetermined variable resistance section intermediate the DC power supply system and DC motor, an electrical condition sensor, and a variable resistance section control in communication with the electrical condition sensor and the predetermined variable resistance section. In some embodiments, the resistance exercise system includes a computing facility providing the ability to configure the exercise system to provide predetermined static or variable exercise resistance during exercise, and for example, during a positive or negative exercise stroke. Some embodiments allow users to create and, if desired, display varying and complex resistance exercise routines with or without use of resistance weights.

An electric power system includes an inverter device coupled with a motor. The inverter device receives from the motor electric energy generated by dynamic braking of the motor. An energy storage device is coupled with the inverter device, and a variable resistive component is disposed between the inverter device and the energy storage device. The variable resistive component controls a direction of conduction of the electric energy from the inverter device toward the energy storage device, a resistive grid, or a system load. The variable resistive component controls the direction of conduction of the electric energy from the inverter device based on a first amount of the electric energy conducted from the inverter device, a transfer rate of the electric energy conducted from the inverter device, or one or more characteristics of the energy storage device.

A charging system for an energy storage in a vehicle comprising: a plurality of parallelly arranged charging switch units, each having an input terminal configured to be connected to a common charging port, and an output terminal configured to be connected to the energy storage, wherein each charging switch unit comprises a contactor configured to control a flow of current from the charging port to the energy storage; for each charging switch unit, a measurement device configured to determine a parameter indicative of a resistance in a current path through the charging switch unit, and a variable resistor configured to control the resistance in the current path; and a charging control unit connected to each of the charging switch units and configured to, if an estimated difference in resistance between any two of the plurality of current paths through a charging switch unit is higher than a predetermined difference threshold value, control the variable resistor of a charging switch unit in the current path having the lowest resistance to increase the resistance of that current path.

A variable resistance pedal assembly (100) for use in a vehicle includes a pedal (104) pivotally moveable between a plurality of operational states including a first operational state, a second operational state and an infinite number of intermediate operational states between the first and second operational states. The assembly also includes a hydraulic damper (130) to dynamically control an effort of the pedal in one or more of the operational states and during one or more movements between the operational states and a pedal position sensor (190) coupled to the pedal. The assembly also includes a controller (200) electrically coupled to each of a fluid valve (170), a fluid temperature sensor (183), an optional fluid pressure sensor (180), and a pedal position sensor with the controller pre-programmed to choose a valve position for the fluid valve based upon at least a measured pedal position that correlates to one of the operational states and a measured temperature.

A variable resistance memory device includes a memory cell structure on a substrate, the memory cell structure including conductive layers, each of the conductive layers including conductive lines spaced apart from each other in a direction parallel to a top surface of the substrate, and memory cell arrays alternatingly stacked with the conductive layers in a first direction perpendicular to a top surface of the substrate, a first peripheral circuit layer between the substrate and the memory cell structure, the first peripheral circuit layer including first transistors, and a second peripheral circuit layer between the first peripheral circuit layer and the memory cell structure, the second peripheral circuit layer including second transistors, and the second transistors including core transistors that are connected to corresponding ones of the conductive lines.

The present invention discloses a displacement measurement device and a displacement measurement method for an eddy current sensor. The displacement measurement device includes: an eddy current sensor, a preamplifier, which is provided with a variable resistor and a resonant capacitor connected in series in sequence, and the resonant capacitor is adapted to be connected in parallel with the probe inductor; a voltage acquisition module, which is arranged in the preamplifier; a controller, which is provided with a control end and a first acquisition end, the control end is connected to the variable resistor, and the first acquisition end is connected to the voltage acquisition module; when the peak-to-peak voltage of the resonant voltage is not within a preset range, the controller adjusts the resistance value of the variable resistor to make the peak-to-peak voltage of the resonant voltage within the preset range. This ensures the consistency of the output signal of the eddy current sensor, ensures the accuracy of the position detection of the magnetic levitation system, thereby improves the stability of the magnetic levitation bearing control system, and reduces the output difference caused by the matching of the sensor probe with different preamplifiers.

An analog multiplier accumulator array comprises analog multipliers organized in a matrix of rows and columns, each of the multiplier comprising one or more than one analog input signal line coupled to the analog multipliers in a row of the array; an analog level sensing circuit; a set of bit lines, each bit line electrically connected to the analog multiplier in each column of the row; and an analog accumulator configured to connect the set of the bit lines to an analog level sensing circuit for generating digital output signals, wherein an access transistor connected to the analog input line and a variable resistor form the analog multiplier.

An semiconductor device may include a first conductive line; a second conductive line disposed to be spaced apart from the first conductive line; a variable resistance layer disposed between the first conductive line and the second conductive line; and an electrode layer which is disposed at least one of a first location between the first conductive lines and the variable resistance layer, or a second location between the variable resistance layer and the second conductive lines and includes a thickness dependent metal-insulator transition (TDMIT) material that exhibits an electrical resistance depending on a thickness of the TDMIT material.

In one example, a system comprises a vector-by-matrix multiplication array comprising non-volatile memory cells arranged into rows and columns; and an output block coupled to the vector-by-matrix multiplication array to receive current from the columns of the array, the output block comprising a current-to-voltage converter to receive current from one or two columns and convert the current into a voltage, the current-to-voltage converter comprising one or more variable resistors configurable to adjust the range of the voltage; and an analog-to-digital converter to convert the voltage into digital bits.

A wearable device comprising a transmitter coil having variable transmission resistance, a first transmission impedance, and a second transmission impedance; an implanted device, comprising a receiver coil having a variable reception resistance, a first reception impedance, and a second reception impedance; wherein the transmitter coil can wirelessly transmit information over a variable frequency to the receiver coil when the variable resistance of the transmitter coil is tuned to the variable resistance of the receiver coil, the transmitter coil is configured to the first transmission impedance, and the receiver coil is configured to the first reception impedance; wherein the transmitter coil can wirelessly transmit power to the receiver coil when the transmitter coil is configured to the second transmission impedance and the receiver coil is configured to the second reception impedance; and wherein the transmitter coil can wirelessly transmit to the receiver coil of the implanted device using a magnetoquasistatic field.

The invention discloses an induction type high-precision urine flow or coronary flow measuring device, which belongs to the technical field of medical instruments, and comprises a measuring box, a cantilever beam extending to the outer side of the measuring box is fixed on the inner side of the measuring box through a fixing assembly, and micro-weight sensing elements attached to the upper side and the lower side of the cantilever beam are arranged in the measuring box. The micro-weight sensing element and the variable resistor form a measuring bridge circuit and are connected with an electric signal recording device located on the outer side of the measuring box through a signal line. A liquid collecting assembly is arranged at the outer end part of the cantilever beam, a flow guide pipe fixing rod is arranged on one side of the liquid collecting assembly and is used for vertically fixing an external flow guide pipe, and the inner side of the flow guide pipe fixing rod is fixed on the side wall of the measuring box. The induction type high-precision urine flow or coronary flow measuring device is simple in structure and convenient to use, changes of liquid flow at different flow speeds can be accurately displayed, and the accuracy and scientificity of measurement and analysis of experimental results are effectively improved.

The present application relates to the field of cable branch box, specifically relates to a kind of integrated cable branch box, including box, door body hinged on the box;Handle assembly for eliminating human body static electricity is provided on the door body;The beneficial effects of the present application are that: in actual use, personnel when opening door body, need to pull handle main body with hand, hand needs to contact pressure plate, i.e. hand and electrode contact, at this time human body-electrode-wire one-variable resistance component-ground electrode-ground forms communication, to carry out the static electricity of human body into ground, realize the purpose of human body static electricity removal;At the same time, due to the need to pull handle main body when opening door body, and the operation of pulling handle main body is human body static electricity removal operation, so it can prevent personnel from forgetting to carry out human body static electricity removal due to forget.