344 results about "Resistive circuits" patented technology

The present disclosure refers to a battery system (100) and a method of detecting an impact on a battery system. The battery system (100) includes a plurality of battery cells (10) accommodated in a housing (20). The battery system (100) includes an impact detection circuit (30). The impact detection circuit (30) includes an electrical resistor circuit (40) supported by a plate member (22) adjacent the plurality of battery cells (10) including a plurality of electrical brittle conductors (42) electrically connected in parallel to each other. Each electrical brittle conductor (42) is configured to break in response to an impact causing a deformation of the electrical brittle conductor (42). A voltage source (50) is connected to the electrical resistor circuit (40) and configured to apply a voltage to the electrical resistor circuit (40). Furthermore, a detection unit (60) is configured to determine an electrical resistance (R, R') of the electrical resistor circuit (40) and / or an electrical current (I, I') flowing through the electrical resistor circuit (40). Further, the detection unit (60) is configured to detect an impact on the battery system (100) based on determining a resistance increase (ΔR) and / or an electrical current drop (ΔI) due to breaking of at least one of the electrical brittle conductors (42)

The invention belongs to the technical field of analog integrated circuit design and memory read-write, and provides a multi-valued RRAM read-write circuit with a write-and-read function. The multi-valued RRAM read-write circuit is a multi-port device capable of performing read-write simultaneously, in write operation, a low dropout regulator is utilized to provide voltage for the RRAM circuit and the standard resistance circuit, mirror current is generated, the resistance value of the RRAM is set to be the total resistance of the standard resistance circuit, an operational amplifier is connected into the circuit through a CMOS switch, and feedback is formed to stabilize the voltage at the two ends of the RRAM; and in the read operation, the CMOS switch is used for disconnecting the operational amplifier, and the voltage at the two ends of the RRAM device is directly read. Compared with an existing multi-valued read-write circuit, the multi-valued RRAM read-write circuit has the advantages that write-and-read multi-valued RRAM read-write is realized, and meanwhile, the read-write circuit is not separated, so that the write-in speed is increased, and the area of the read-write circuit is saved.

A bandgap reference voltage generating circuit includes a bandgap cell, a tail resistor circuit, a high-order curvature compensation current generating circuit, an IZTAT current sink circuit, and a start-up circuit. The bandgap cell has a base current redistribution circuit that drives the bases of the bipolar transistors using a first base resupply current taken from the first current leg of the cell, and that uses a matched second base resupply current taken from the second current leg of the cell. VBG error due to bipolar current gain variation is reduced. The N-channel transistors of the curvature compensation current generating circuit operate in the near threshold region. The output current of the compensation circuit varies as power of approximately 2.1 of the input current. The tail resistor circuit is programmable in various ways so that the amount of curvature correction can be tailored and trimmed.

A communication circuit includes a termination circuit with multiple termination blocks where the termination circuit is coupled to a die terminal for conveying a signal. Each termination block includes a resistive circuit and a switch for selectively implementing the resistance of the resistive circuit in the termination resistance of the communication circuit. Each block includes a string of one or more diodes coupled to the resistive circuit and to the selection switch. The string of one or more diodes is nonconductive during normal operation and is conductive during an ESD event affecting the die terminal to discharge the ESD current to a supply voltage terminal when the selection switch is nonconductive.

The invention discloses a method for manufacturing a high-precision carbon oil resistor circuit board for a vehicle, which comprises the following steps of: attaching a thick copper layer and a micro-adhesive film to form an attaching plate, and manufacturing a groove in the attaching plate corresponding to a resistor pattern; the thickness of the thick copper layer is greater than the depth of the groove; the grooves are filled with carbon oil, then curing processing is carried out, carbon oil patterns are formed, and the whole board forms a carbon oil pattern board; laminating the first single-sided copper-clad plate and the carbon oil pattern plate; the first single-sided copper-clad plate is opposite to the carbon oil pattern; removing the micro-adhesive film, carrying out copper reduction treatment on the thick copper layer, exposing the carbon oil pattern, forming a carbon oil pattern double-sided board, then manufacturing a circuit pattern, and carrying out post-process processing to form a circuit board; the precision of the carbon oil pattern manufactured through the reverse manufacturing process is far higher than that of traditional silk-screen printing, and the problem that the resistance value of the carbon oil pattern exceeds the standard due to the fact that the processing size of the carbon oil pattern is not easy to control in a silk-screen printing ink manufacturing mode in the prior art is solved.

A circuit includes a bias current generator, a temperature compensation circuit, and a Hall effect sensor. The bias current generator has a first input, a second input, a first terminal, and a second terminal. The bias current generator includes a resistor circuit having a first terminal and a second terminal coupled to the first terminal and the second terminal of the bias current generator respectively. The temperature compensation circuit has a first input, a second input coupled to the first input of the bias current generator, and an output coupled to the second input of the bias current generator. The Hall effect sensor has a first terminal coupled to the first terminal of the bias current generator, a second terminal, a third terminal, and a fourth terminal.

A communication circuit includes a termination circuit with multiple termination blocks where the termination circuit is coupled to a die terminal for conveying a signal. Each termination block includes a resistive circuit and a switch for selectively implementing the resistance of the resistive circuit in the termination resistance of the communication circuit. Each block includes a string of one or more diodes coupled to the resistive circuit and to the selection switch. The string of one or more diodes is nonconductive during normal operation and is conductive during an ESD event affecting the die terminal to discharge the ESD current to a supply voltage terminal when the selection switch is nonconductive.

The utility model relates to a polluted landscape water body treatment device, including coupling type microbial fuel cell and external circuit, coupling type microbial fuel cell includes cell cathode, fixed ring, gasbag, cell anode, PVC flexible pipe, proton exchange membrane, PVC flexible pipe is filled with electrolyte, the cell anode is planted with submerged plant, the proton exchange membrane is planted on the PVC flexible pipe. And the external circuit comprises a light-emitting circuit, a resistance circuit and a heating circuit which are connected in parallel between the battery cathode and the battery anode. Electric energy generated by the microbial fuel cell is used for providing power for photocatalytic oxidation, magnetic flocculation recovery and water body temperature rise in the treatment process, no external power source is arranged, the water body treatment capacity is greatly improved, meanwhile, the later operation and maintenance cost is reduced, aquatic plant and microbial treatment is introduced into the system, and the water body treatment efficiency is improved. A mutual promotion effect can be achieved with the microbial fuel cell, so that the power generation capacity of the cell and the processing capacity of the system are improved.

The invention provides a transmitter and a gain temperature compensation circuit thereof, and the output end of a temperature detection circuit is connected with the control end of a variable resistance circuit. The variable resistance circuit is connected in parallel with the input end of a power amplifier in the transmitter; the temperature detection circuit outputs a control signal to the variable resistance circuit according to the detected temperature and adjusts the resistance value of the variable resistance circuit; by introducing the variable resistance circuit and the temperature detection circuit and dynamically adjusting the resistance value according to the temperature change, the adjustment of the load in the transmitter can be effectively realized, so that the gain is kept relatively constant under different temperature conditions, and the design not only improves the stability and reliability of the circuit, but also improves the reliability of the circuit. And the performance of the circuit under different environmental conditions is optimized, the power consumption of the transmitter is reduced, the working point of a transistor in the transmitter is not influenced, and the performance of the transmitter is relatively stable.

The high-order compensation band-gap reference circuit capable of being trimmed comprises PNP type triodes Q0-Q2, PMOS (P-channel Metal Oxide Semiconductor) transistors M1-M3, an NMOS (N-channel Metal Oxide Semiconductor) transistor M4, resistors R0-R3, a resistor RT (1) capable of being trimmed, a four-input operational amplifier A1 and a two-input operational amplifier A2, according to the reference voltage generated by the circuit provided by the invention, high-order compensation is completed by utilizing the four-input operational amplifier A1 on the basis of traditional first-order temperature compensation, and meanwhile, the trimming resistor circuit is added to ensure that the band-gap reference voltage is not influenced by temperature and process changes, so that the high-precision band-gap reference voltage is obtained; the band-gap reference has the advantages of high band-gap reference precision, simple compensation algorithm and good compensation stability.

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 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 relates to a sampling device and a sampling method, the sampling device comprises a motor, a driving circuit and a sampling circuit, the sampling circuit comprises a first sampling resistor circuit, a second sampling resistor circuit, a first amplifier corresponding to the first sampling resistor circuit, a second amplifier corresponding to the second sampling resistor circuit, and a processor; the first amplifier amplifies the differential voltage on the first sampling resistance circuit to obtain a first voltage signal; the second amplifier amplifies the differential voltage on the second sampling resistance circuit to obtain a second voltage signal; the processor determines a voltage output result according to the first reference voltage and the second voltage signal, determines a to-be-output voltage signal from the first voltage signal and the second voltage signal according to the voltage output result, and processes the to-be-output voltage signal to obtain a sampling current; the sampling circuit can adaptively switch the sampling range according to the magnitude of the circuit current, and simultaneously considers the sampling current precision and the sampling range.

A temperature sensor circuit includes a gallium nitride (GaN) integrated circuit (IC) die including a temperature sensitive two-dimensional electron gas (2DEG) resistive circuit element that includes a 2DEG channel; and a sensing circuit included to sense resistance of the temperature sensitive 2DEG resistive circuit element.

The utility model discloses a liquid crystal display circuit capable of realizing contrast adjustment of a display screen, and belongs to the field of liquid crystal display circuits. Comprising a master control MCU, a power supply voltage stabilization unit, an upper computer interface unit, a display screen interface unit and a sampling voltage division unit. And the power supply voltage stabilizing unit, the upper computer interface unit, the display screen interface unit and the sampling voltage dividing unit are all connected with the main control MCU. An ADC module of the master control MCU can collect contrast regulation voltage ADCV0, the sampling and voltage dividing unit converts the ADCV0 voltage regulation range input by the master control MCU into the range of 0-3.3 through a resistance circuit and then outputs the ADCV0 voltage regulation range to the upper computer interface unit, an MCU program of an upper computer automatically calculates EV, Ratio and other numerical values according to the measured voltage, the numerical values are written into a screen driving chip, and the screen driving chip is used for driving the screen. Therefore, contrast adjustment of the display screen is realized. Through the design, the liquid crystal display module packaged by the COG can realize contrast adjustment on display screen hardware, is more convenient to use, and can be compatible with a liquid crystal module interface packaged by the COB.

The invention relates to a multi-protocol communication interface chip receiver. The receiver comprises an RS232 receiver and an input switch resistance circuit, wherein the input end of the RS232 receiver is connected with the input switch resistance circuit; the input switch resistance circuit is used for enabling the input end of the RS232 receiver to be in a determined state voltage under the condition that the chip is turned off, and comprises a driving control circuit, a switch grid control and clamping circuit, a switch circuit and an input resistor; the design problem of a multi-protocol communication interface chip caused by incompatibility of the communication protocols of the RS232 receiver and the RS485 receiver in the aspects of common-mode input impedance and the like is solved, and the design of the multi-protocol communication interface chip can be realized.

The invention discloses a charging equalization circuit, a charging equalization method and electronic equipment, relates to the field of charging, and aims to equalize the current of a battery pack and improve the user experience. The circuit comprises an SC circuit, a BUCK circuit and a processor, the SC circuit and the BUCK circuit are respectively connected with the processor, a first battery and a second battery, and the processor is used for controlling a charging equalization circuit to equalize the charging current of a battery pack; the battery pack comprises a first battery and a second battery, the first battery and the second battery are connected in parallel, and the rated electric quantity of the first battery is smaller than that of the second battery; the line resistance between the SC circuit and the first battery is smaller than that between the SC circuit and the second battery; the line resistance between the BUCK circuit and the first battery is greater than that between the BUCK circuit and the second battery; the processor is used for respectively acquiring current and electric quantity of the first and second batteries; and the output current of the SC circuit and the BUCK circuit is controlled according to the current and the electric quantity of the first battery and the second battery.

A display device includes: a display panel; a loop resistance circuit disposed in an edge region of the display panel; and a crack detection circuit configured to detect a resistance value of the loop resistance circuit, in which the loop resistance circuit includes a first detection region having different resistance values and a second detection region having different resistance values.

The invention relates to a switch resistor circuit and electric equipment. The switch resistance circuit comprises a bias current supply circuit and at least one switch resistance unit. The switch resistor unit comprises a first resistor assembly, a second resistor assembly, an MOS tube, a bias voltage generation circuit and a transmission switch circuit. The first pole of the MOS tube is connected with the first end of the first resistor assembly and is also used for accessing a current inflow port; the second electrode of the first MOS tube is connected with the second end of the first resistor assembly and the current outflow port through the second resistor assembly. The bias voltage generation circuit is arranged between the grid electrode and the first electrode of the MOS tube and is connected with the bias current supply circuit through the transmission switch circuit. When the transmission switch circuit is in a conducting state, the bias voltage generating circuit receives bias current and generates bias voltage between the grid electrode and the first electrode of the MOS tube to conduct the MOS tube. Therefore, the on-off of the MOS tube can be controlled through the bias current so as to adjust the resistance value of the switch resistor unit.

A piecewise linear current-mode digital-to-analog converter circuit approximates an exponential output current over a range of input codes by generating linearly varying currents with different slopes of different ranges of the input codes. The piecewise linear current-mode digital-to-analog converter circuit includes a current generator circuit that generates the output current based on a reference voltage and a feedback signal. A variable resistance circuit is used to generate the feedback signal using the output current. Respective values of the reference voltage and the variable resistance circuit vary as a function of the input code.

The aerosol generating device includes a battery, a DC / DC converter configured to boost the voltage of the battery to supply a boosted voltage to the first heater and the second heater, a first resistor circuit connected in series with the second heater and used to sense the current flowing through the second heater, a second resistor circuit connected in series with the first resistor circuit and used to reduce the peak value of the current flowing through the second heater, an operation switch that determines whether to pass current through the second heater, and a processor for controlling the battery, the DC / DC converter, and the operation switch.

The application discloses a DC-DC converter circuit based on over-temperature protection threshold adjustment, and an over-temperature detection module comprises: a first transistor circuit, the base of the transistor is connected with the reference voltage VBG output end of a band gap reference module, a positive temperature coefficient voltage proportional to absolute temperature is generated; a voltage dividing circuit input end is connected with the positive temperature coefficient voltage output end, the positive temperature coefficient voltage is divided to generate a detection voltage; a second transistor circuit, the base of the transistor is connected with the detection voltage output end, an over-temperature protection signal OTP is output to shut down the main circuit of the converter; an adjustment resistance circuit receives a digital adjustment signal; the digital adjustment signal changes the voltage dividing ratio of the positive temperature coefficient voltage divided to the detection voltage by controlling the equivalent resistance value of the adjustment resistance circuit; the change direction of the voltage dividing ratio is opposite to the change direction of the reference voltage VBG caused by adjustment. The application significantly improves the accuracy, consistency and overall reliability of the over-temperature protection threshold.

A self-calibration digital-to-analog converter (DAC) and a calibration method for DAC are provided. The circuit includes a resistor circuit, a buffer amplifier, a fine-tuning circuit, and a correction switching circuit. In normal operation mode, the resistor circuit receives the common voltage for conversion. In correction mode, the circuit performs self-correction in a sampling time and a comparison time. During the sampling time, the resistor circuit receives the reference voltage and first correction data, and the buffer amplifier input samples the voltage. During the comparison time, the resistor circuit receives the common connection voltage and second correction data, and the fine-tuning circuit adjusts the correction data until the buffer amplifier output voltage flips and records the correction value corresponding to the second correction data. With this self-correction mechanism, the circuit can output theoretically correct digital-to-analog conversion results under the reference voltage and common connection voltage.

Optoelectronic time-of-flight measuring device (1) for determining a measured value (M) that is proportional to the distance (Δs) of objects (2) within a monitoring area (8), consisting of: - a first circuit (3) which has at least one light source (7) emitting light rays (9), the pulsed light rays (9) of which follow a predetermined beam path (16), - a second circuit (4) which is connected in parallel to the first circuit (3) and is formed from a series circuit of at least one sensor (10), a receiver amplifier (12) and a time-of-flight meter (13), which detects the light rays (9) reflected by the object (2) and by which the measured value (M) proportional to the distance (Δs) is generated wherein the first and second circuits (3, 4) are supplied independently of a power source (5, 5'), - from a differentiating circuit (11) arranged in the second circuit (4), which is electrically connected downstream of the receiving amplifier (12) and which provides a correction signal (u K ) generates a change proportional to the change over time (you A / dt) of the output signal (u A ) of the receiving amplifier (12) is, characterized by that the differentiating circuit (11) has a peak-value rectifier (15) and that the differentiating circuit (11) is formed from at least two capacitors (18, 20) and a resistor circuit (19), wherein one of the capacitors (20) is a resistor that contributes to the change in the output signal (du A / dt) proportional correction voltage (v K ) generated.

An apparatus comprising: a driving circuit; a switchable termination resistance circuit configured to selectively provide a resistance based on an output of the driving circuit; wherein the output of the driving circuit is provided by a parallel arrangement of a first branch having a first switch and a second branch having a second switch, wherein the second branch provides greater current than the first branch, and wherein the driving circuit is configured to provide, in response to an enable signal received at an input of the driving circuit, the output comprising a first current by turning on the second switch for a predetermined time period following the provision of the enable signal to cause the provision of the termination resistance, and, after said predetermined time period, turn off the second switch such that the output comprises a second current, less than the first current.

A resistive memory device performs a selective write operation. Included in the resistive memory device are at least one memory cell, a reference resistance circuit whose resistance value is adjusted, a sense amplifier configured to read data stored in the at least one memory cell by comparing a resistance value of the at least one memory cell with a resistance value of the reference resistance circuit, a write driver configured to program write requested data into the at least one memory cell, and a selective write controller. The selective write controller performs a read-before-write operation by adjusting the resistance value of the reference resistor circuit according to the write data during the selective write operation.

A multi-phase inverter coupled to an electric machine includes a gate driver system with a gate controller operatively connected to gate driver circuits and hybrid switching power modules. The hybrid switching power modules are integrated into the phase strings of the inverter, which are connected to the electric machine via AC power connections. Each hybrid switching power module includes a first semiconductor switch connected in parallel with a second semiconductor switch, the first semiconductor switch having different performance characteristics than the second semiconductor switch. The gate driver circuit includes a gate driver, a first variable resistance circuit, and a second variable resistance circuit. The gate controller is connected to the gate driver circuit via a plurality of connections.The gate controller generates control signals that are passed to the gate driver circuit to control the hybrid switching power module via the connections.

The application discloses a kind of adjustable low-pass filter circuits based on self-bias pseudo resistance, the filter circuit includes: self-bias pseudo resistance circuit, differential source follower circuit and gain compensation circuit.The self-bias pseudo resistance circuit is made of back-to-back PMOS transistor, and its gate-source voltage is controlled by the direct current component of system input signal and output signal, so as to realize the function of adjustable large resistance;The differential source follower circuit uses common-drain amplifier, and converts passive amplifier into active amplifier with large input impedance and medium output impedance, while providing stable adjustable bias for the above-mentioned pseudo resistance;The gain compensation circuit is used to compensate for the gain loss of the common-drain amplifier due to the substrate effect.The low-pass filter circuit of the application can achieve considerable time constant with very small chip area and power consumption, and can be used in wearable physiological signal detection device, with the advantages of low power consumption, small area, high stability and the like.

A tunable termination resistor circuit associated with a line driver in a line on-chip is provided. The circuit includes a first current source and a first resistor coupled to the first current source and the line. The circuit also includes a first diode comprising a first terminal and a second terminal, the first terminal being coupled to the first resistor and the second terminal being coupled to a gate of a transistor, the gate being coupled to a gate voltage. The circuit also includes a capacitor coupled to the gate and the source of the transistor. The circuit also includes a third resistor coupled in series to a fourth resistor in the line each of the third resistor and the fourth resistor comprising a resistance changed by the gate voltage. There are other embodiments as well.

The embodiment of the invention provides an overvoltage absorption circuit, an overvoltage absorption method and an overvoltage absorption system for a nuclear power plant. The overvoltage absorption circuit and the overvoltage absorption method are applied to the scene of the FORSMARK effect of nuclear-grade electrical equipment. The circuit comprises an alternating current module, a rectifier module, a load module and a voltage absorption module, wherein the rectifier module comprises a silicon controlled rectifier (SCR); the voltage absorption module is connected in parallel with the output end of the rectifier module; the voltage absorption module comprises an insulated gate bipolar transistor (IGBT) module and a resistor which are connected in series; the circuit further comprises a control assembly connected with the rectification module and used for collecting voltage parameters of the output end. Under the condition that the value of the voltage parameter is increased to a first threshold value, a first control signal is sent to the voltage absorption module, so that the IGBT module is in a conducting state; under the condition that the value of the voltage parameter is reduced to a second threshold value, a second control signal is sent to the voltage absorption module, so that the IGBT module is in a turn-off state; the first threshold value is greater than the second threshold value.