651 results about "Voltage divider" patented technology

The invention discloses an electronic device and a voltage leakage circuit, the electronic device comprises a control circuit and a power circuit, the control circuit is connected with the power circuit and is used for controlling the power circuit to perform leakage or stop leakage, and the control circuit comprises a voltage division circuit; the comparison circuit is connected with the voltage division circuit and is used for receiving the first voltage from the voltage division circuit and comparing the first voltage with a preset reference voltage; the driving circuit receives the first reference voltage, is connected with the comparison circuit and the power circuit, and is used for outputting the first reference voltage to the power circuit when the first voltage is greater than or equal to the reference voltage so as to control the power circuit to discharge; one end of the hysteresis circuit is connected with the power circuit, the other end of the hysteresis circuit is connected between the voltage division circuit and the comparison circuit, and the hysteresis circuit is used for increasing the first voltage when the driving circuit outputs the first reference voltage to the power circuit. The power circuit is controlled through the voltage division circuit, the comparison circuit and the driving circuit, the cost can be reduced, and the occupied space is small.

The invention discloses a switching-in circuit with a self-adaptive voltage class and a double check logic. The switching-in circuit comprises a high-precision voltage division module, a double-redundancy sampling framework and a double sampling judgment logic executed by an MCU (Microprogrammed Control Unit), the high-precision voltage dividing module adopts a resistance network matched with a temperature coefficient, and can accurately divide input voltage in a wide temperature range; the double-set redundancy sampling architecture performs parallel sampling on the same path of input signals through two sets of completely independent signal conditioning loops, ADCs, digital isolation chips and isolation power supplies to form a physically isolated redundancy channel; the dual sampling discrimination logic executed by the MCU verifies a dual-channel sampling result based on a logic voting mechanism, and finally outputs a reliable input state or an abnormal alarm; according to the invention, through adaptive voltage design and redundancy check, high reliability is ensured, meanwhile, the requirements for spare parts of equipment of different voltage grades are remarkably reduced, and the inventory management cost is effectively reduced.

The invention relates to the technical field of switching power supply, and discloses a switching power supply constant-current protection circuit and a protection method thereof.The switching power supply constant-current protection circuit comprises an environmental parameter sensing module which collects current signals of a constant-current output loop through a shunt resistor and a differential amplifier, collects input voltage through a resistance voltage-dividing network and collects temperature through a thermistor; the dynamic threshold value generation module is used for receiving the current signal and the environment parameter and generating a dynamic current protection threshold value to maintain constant current output; the AI prediction protection module is used for sampling current signals, extracting high-frequency energy characteristics through frequency domain analysis and comparing the high-frequency energy characteristics with a dynamic current protection threshold value; a digital twin monitoring module; and a protection execution module. Temperature parameters are collected in real time, polynomial fitting calculation is executed, the nonlinear characteristic of a thermistor is converted into a linear compensation coefficient, a protection threshold value is dynamically generated in combination with a current effective value and input voltage fluctuation, and self-adaptive drift compensation of a constant-current protection point in a full temperature range is achieved.

A method for detecting movement of a vehicle body component moveable by an electric motor having a rotor and a three-phase stator, and a motor vehicle. The method includes: loading two stator phases with a pulse-width-modulated voltage and maintaining a third stator phase at a free-floating state; monitoring the third stator phase as a measuring point for an inductive voltage divider formed using the two stator phases; and detecting movement of the vehicle body component when an electric signal at a measuring point or a variable derived from the electric signal exceeds a specified threshold value. The motor vehicle includes a control device that is operable to perform the method.

The utility model provides a capacitor module for solving battery abnormity of a power utilization acquisition terminal in a low temperature scene, a voltage determination circuit, a super-capacitor charging circuit and a boost circuit are integrated on a printed board, the voltage determination circuit comprises a chip U1 and a divider resistor, the super-capacitor charging circuit comprises a chip U2 and a shunt resistor, and the boost circuit comprises a chip U1 and a chip U2. According to the boost circuit, an internal logic power supply pin of a chip U3 is connected with a BOOST circuit output by the BOOST circuit, a reset signal pin of a chip U1 is connected with enable signal pins of a chip U2 and the chip U3, a power supply pin of the chip U1 is connected with a nickel-metal hydride battery charging circuit, an input end of the chip U2 is connected with the nickel-metal hydride battery charging circuit, an output end of the chip U2 is connected with a super capacitor, and the super capacitor is connected with a power supply pin of the chip U1. The input end and the output end of the chip U3 are both connected with the nickel-metal hydride battery charging circuit, and a switch pin of the chip U3 is connected with the super capacitor. By adopting the technical scheme, the cost is lower than that of a low-temperature nickel-metal hydride battery, and a nickel-metal hydride battery pack can be directly replaced.

The present invention discloses a hybrid switching converter with a single inductor and multiple outputs and a control method thereof, configured to convert an input voltage to a first and a second output voltages. The hybrid switching converter includes: a sub-switching converter, which converts the input voltage to an intermediate voltage; a first and a second output switches, which conduct the intermediate voltage during a first and a second inductance periods, respectively, to generate the first and second output voltages. The sub-switching converter comprises: a switched capacitor voltage divider circuit, which controls multiple switches through pulse-width modulation (PWM) signals to generate two divided voltage levels in each inductance cycle for supplying an inductor therein; and a control circuit, which generates PWM signals to control the multiple switches and the output switches in a time-division manner, and regulates the output voltages to target values according to output voltage feedback signals.

The present disclosure provides a semiconductor device and an electrostatic discharge (ESD) clamp circuit. The semiconductor device includes a voltage divider, a cascoded inverter, and a discharge circuit. The voltage divider is electrically coupled between a power supply voltage and an output voltage of the semiconductor device. The cascoded inverter is electrically coupled to the voltage divider. The discharge circuit is electrically coupled to the cascoded inverter. The cascoded inverter is configured to turn on the discharge circuit to discharge an electrostatic discharge (ESD) current in response to an ESD event occurring on the power supply voltage or the output voltage when the semiconductor device is in an ESD mode.

The utility model discloses a low-power-consumption high-efficiency main transformer integrated board for an air-cooled refrigerator, which comprises an X capacitor discharge circuit, a variable-frequency power supply circuit, a bus voltage sampling circuit, a mains supply voltage sampling circuit and an IGBT (Insulated Gate Bipolar Translator) driving circuit, and is characterized in that the X capacitor discharge circuit uses a discharge chip to replace a traditional discharge resistor; the variable-frequency power supply circuit is additionally provided with a variable-frequency power supply switch circuit, the bus and commercial power voltage sampling circuit modifies the resistance value of a divider resistor, and the IGBT driving circuit modifies the resistance value of a resistor. According to the utility model, improvement is made on the basis of a traditional air-cooled refrigerator main transformer integrated plate, the standby power consumption and the operation power consumption of the main transformer integrated plate are reduced, and the low-power-consumption and high-efficiency electric control design is realized.

This invention relates to the field of integrated circuit I / O interface design technology. It discloses a dual-mode (digital-analog) input / output interface circuit based on low-voltage devices adapting to high-voltage power supplies, aiming to solve the problems of low-voltage process chips being unable to directly adapt to high-voltage power supplies and limited I / O functionality. The interface circuit includes a digital output module, a digital input module, an analog I / O module, and a mode summary and ESD circuit. Through external configuration signals, the circuit can switch between digital input, digital output, analog I / O, and power-down modes. The digital output module incorporates a dual-mode high-voltage adaptation mechanism, utilizing a voltage divider resistor series and a common-gate protection transistor to ensure the safety of low-voltage devices under high voltage. The digital input module employs non-overlapping control to eliminate dynamic power consumption. A full-mode high-impedance isolation design ensures the reliability of mode switching. This invention achieves safe adaptation of standard low-voltage CMOS devices to high-voltage power supplies and integrates dual-mode functionality, offering advantages such as high integration, low power consumption, high reliability, and strong process compatibility.

The utility model relates to the technical field of industrial semiconductors, and discloses a device for detecting the working state of a lamp holder of ultraviolet light curing equipment, which integrates temperature, wind pressure and ultraviolet light intensity detection functions by optimizing the structure of a hardware circuit. The circuit comprises a switch type capacitor voltage converter, a linear voltage regulator, a phototriode, an NTC thermistor, a partial pressure sensor and a CAN communication module. Through the bidirectional TVS diode, RC filtering and two-stage voltage stabilization design, the anti-electromagnetic interference capability is improved, and the signal transmission reliability is improved; temperature, wind pressure and illumination detection circuits are integrated on a single board, the structure is simplified, and the space is saved; the standby energy consumption of the sensor is reduced through hardware power management; by comprehensively optimizing the circuit structure and the signal transmission path, the detection reliability of the working state of the lamp holder of the ultraviolet curing equipment is improved.

This application discloses an MCU sleep / wake-up circuit, including a signal circuit, a second sleep control transistor Q2, a first hierarchical sleep control transistor Q1, an LDO chip U, and a control unit MCU. The signal circuit outputs a wake-up signal. The base of the second sleep control transistor Q2 is connected to the output terminal of the signal circuit through a current-limiting resistor R4, grounded through a voltage divider resistor R9, and connected to the enable terminal ENA through a current-limiting resistor R3. The enable terminal ENA is connected to the control unit MCU, the emitter is grounded, and the collector outputs a control signal. The control signal is input to the first hierarchical sleep control transistor Q1 through a bias voltage divider circuit. The emitter of the first sleep control transistor Q1 is connected to the power supply VIN, and the collector outputs the power supply voltage to the LDO chip U. The LDO chip U outputs its operating voltage to the control unit MCU. When the control unit MCU is working, it outputs a high level to the enable terminal ENA. This application can reduce the complexity of the sleep / wake-up system and achieve low-power sleep and reliable wake-up of the control unit MCU.

This invention discloses a high-voltage capacitor safety discharge device and method, relating to the field of safety discharge technology. The device includes a discharge box, a resistor box, and a control box. The top of the discharge box is equipped with a test electrode for connection to the component to be discharged. Inside the discharge box are at least two robotic arm modules and a voltage divider for monitoring the voltage of the component to be discharged. A conductive electrode is located at the end of each robotic arm module facing the test electrode. The resistor box contains at least two sets of discharge resistors with different resistance values ​​and a temperature sensor. The input terminal of each discharge resistor is connected to a corresponding conductive electrode, and the output terminals of each discharge resistor are connected in series with a current sensor and then grounded. The control box is configured to control at least one robotic arm module to move towards or away from the test electrode based on signals output from the voltage divider, current sensor, and temperature sensor, thereby controlling at least one conductive electrode to contact or disconnect from the test electrode. This invention can improve safety during the discharge process.

A secondary side controller for an AC-DC converter, the secondary side controller having a single synchronous rectifier sense (SR_SNS) terminal coupled to a synchronous rectifier (SR) of the AC-DC converter, and a voltage divider circuit coupled to the single SR_SNS terminal, the voltage divider circuit configured to provide a signal to a sense circuit. The voltage divider includes an active diode, an internal resistive element, and a switch, wherein the active diode is configured to control the switch to enable or disable the internal resistive element based on a comparison of a voltage at the single SR_SNS terminal to a reference voltage.

The invention discloses an X-ray machine power supply internal inversion voltage adjusting method and system, and relates to the technical field of inversion voltage stabilization, and the method comprises the steps: carrying out the partition division of a PWM output frequency through setting different target voltages, and carrying out the switching control through a hysteretic curve; the numerical value of the feedback voltage is measured through a voltage divider, and adjustment and stabilization are carried out through a PID algorithm; voltage gears output by a set target are judged, and waveforms are output at different PWM frequencies; according to the invention, the contradictory relation between the internal inversion boost control precision of the X-ray machine power supply and the maximum power is solved, the influence of the PWM output frequency on the power and precision is considered, and the precision and high efficiency of the X-ray machine power supply are ensured.

The invention discloses an adjustable direct-current precise high-voltage reference source system for an ultrahigh-resistance trimming machine, which belongs to the field of precise electronic measurement technology and high-voltage technology, and comprises a pre-voltage-stabilizing rectification filtering and voltage doubling circuit, a low-voltage precise reference source circuit, an overvoltage protection circuit and a linear adjustment series voltage stabilizing circuit. The pre-voltage-stabilization rectification filtering and voltage doubling circuit provides adjustable direct-current voltage for the linear adjustment series voltage-stabilizing circuit, the low-voltage precision reference source circuit provides + 10V reference voltage for the linear adjustment series voltage-stabilizing circuit, and the overvoltage protection circuit is used for monitoring sampling voltage output by the linear adjustment series voltage-stabilizing circuit and providing protection signals. The precision and the stability of the system are determined by floating drive feedback control, pre-voltage stabilization and a low-voltage precision reference source, the performance of the system is far better than that of a reference source for directly stabilizing high voltage, high-voltage sampling is formed by an ultrahigh-stability resistance voltage divider and a reverse-phase amplification circuit, and the long-term stability of feedback signals is guaranteed.

This invention provides a reference voltage buffer circuit and calibration method for a high-precision analog-to-digital converter (ADC). The circuit includes a first operational amplifier whose inverting input is connected to a reference voltage, and whose output is fed back to the non-inverting input via a first driving transistor and a voltage divider circuit. A second operational amplifier's non-inverting input is connected to a first voltage divider node, its inverting input is connected to a second voltage divider node, and its output is connected to the gates of several third driving transistors and a second driving transistor. The drains of the third driving transistors are all connected to the first voltage divider node via switches. The width-to-length ratios of the second driving transistors and the several third driving transistors are linearly related. The switches are all input with logic control signals to control their states for linear calibration of the reference voltage. This invention uses binary encoding to control the switch states for linear calibration of the output reference voltage and significantly reduces the total resistance by designing a linear relationship between the resistors, thus reducing chip area and cost.

Method for operating a resistive touchscreen (1), wherein the coordinates of a touch point (25) on the touchscreen (1) are connected to a circuit arrangement, - wherein the circuit arrangement comprises a resistive touchscreen (1) with a resistive first layer (2) and a resistive second layer (3) arranged in parallel to each other, - wherein the voltage dividers (U1, U2) of the first and second layers (2, 3) formed by touching the touchscreen (1) are extended by electrical resistors (8, 11, 14, 17) arranged at the edges (4, 5, 6, 7) of the first and second layers (2, 3), characterized in that determined positions of the touch point (25) outside the operating area of ​​the touchscreen (1) are recognized as an error of a control circuit of the touchscreen (1).

A power supply device with high output stability includes a voltage divider circuit, a full bridge rectifier, a resonant capacitor, a first transformer, a second transformer, a first switch element, a second switch element, a third switch element, an output stage circuit, and a detection and control circuit. The first switch element selectively couples the second transformer to the first transformer. The second switch element selectively couples the output stage circuit to the first transformer. The third switch element selectively couples the output stage circuit to the second transformer. The detection and control circuit appropriately controls the first switch element, the second switch element, and the third switch element according to a divided voltage from the voltage divider circuit and a capacitive voltage from the resonant capacitor.

This invention discloses a constant-time soft-start circuit and method for power transistors independent of input voltage. It includes a power transistor NM1, a soft-start current generation circuit, a current mirror circuit, a soft-start capacitor Cs, and a soft-start loop. The drain of power transistor NM1 is connected to the input signal VIN, and the source of power transistor NM1 generates an output signal VOUT. The soft-start current generation circuit generates a soft-start current Is1. The current mirror circuit replicates the soft-start current Is1 and charges the soft-start capacitor Cs to generate a ramp signal V2. The gate of power transistor NM1 is connected to a signal VG. The soft-start loop clamps the voltage divider signal V1 of signal VG to follow the ramp signal V2. This invention uses a negative feedback loop to control the gate voltage of the power transistor to follow a ramp signal that varies with the input voltage, decoupling the soft-start time from the input voltage, ultimately achieving a constant-time soft-start of the power transistor independent of the input voltage.

A dryer appliance, a controller and a method for dryer cycle control include a voltage divider circuit having a first thermistor configured to receive a first temperature signal corresponding to an inlet flow of air to a heater assembly, and a second thermistor configured to receive a second temperature signal corresponding to a heated flow of air heated from the heater assembly. The first thermistor and the second thermistor have a substantially similar resistance-temperature curve as one another. An output voltage is determined based on an input voltage, the first thermistor, and the second thermistor. A heater control relay is configured to compare the output voltage to a reference voltage corresponding to a control pulsing, a timer adjustment, or a cycle termination. The dryer cycle is adjusted based on the output voltage relative to the reference voltage.

An electrical circuit assembly for a glove as well as a glove. The electrical circuit assembly includes a trigger and at least one function button as well as a holder. An electronic module can be inserted into the holder in order to be held in place by the holder. The holder includes at least one electrical contact which physically contacts an electrical mating contact of the electrical module when the electronic module is inserted. In addition, the electrical circuit assembly includes a voltage divider, wherein the at least one electrical contact is connected electrically to the trigger and the at least one function button via the voltage divider so that depending on the respective state of the trigger and / or the at least one function button, a different voltage value is determinable at the at least one electrical contact.

This invention discloses a linear compensation circuit and method for a silicon piezoresistive pressure sensor, belonging to the technical field of silicon piezoresistive pressure sensors. The linear compensation circuit includes a signal conditioner D1, an operational amplifier N1, a lid curve correction switch S1, a bottom curve correction switch S2, and voltage divider compensation resistors R1 to R7. By adjusting the lid curve correction switch S1, the bottom curve correction switch S2, and the voltage divider compensation resistors R1 to R7, the correction excitation voltage UR is adjusted by feedback with the output voltage VOUT. The correction excitation voltage UR and the output voltage of the silicon piezoresistive pressure sensor core N2 are linearly related, ultimately enabling the silicon piezoresistive pressure sensor to output linearly, reducing the scrap rate of the silicon piezoresistive pressure sensor core N2, and solving the problem that existing linear compensation technologies can only achieve single linear compensation of the lid curve through the back-end circuit and cannot meet the linear compensation of the bottom curve.

A memory device is provided and including a memory array including multiple memory cells each including a memory unit; and a first number of first transistors coupled in series between the memory unit and a first voltage terminal. The memory device further includes a voltage generating circuit coupled between the memory array and a second voltage terminal. The voltage generating circuit includes multiple voltage divider circuits each including a second number of second transistors coupled in series to a corresponding one in multiple data lines to a corresponding column of the memory cells.

Structures and methods with a switchable voltage divider and a related method are disclosed. A structure of the disclosure includes a plurality of voltage nodes each receiving one of a plurality of voltages from the charge pump. A switchable voltage divider couples the plurality of voltage nodes to an output amplifier. The switchable voltage divider includes a common node and a plurality of first stages each coupled to one of the plurality of voltage node. Each first stage includes at least one first resistor, a first PFET, and a second PFET connected in series between a corresponding one of the plurality of voltage nodes and the common node, and a third PFET connected to a junction between the first PFET and the second PFET. A second stage includes multiple second resistors and an NFET connected in series between the common node and ground.

The invention discloses an adjustable voltage circuit, a control method thereof and a motor driving device, and belongs to the technical field of power supply circuits. The adjustable voltage circuit comprises a voltage dividing module used for dividing power supply voltage provided by a power supply end and outputting divided voltage; an impedance module; at least one of the voltage dividing module and the impedance module comprises a variable resistor, so that the divided voltage and / or the impedance of the impedance module is adjustable; the electric signal adjusting module is used for determining the voltage output by the electric signal adjusting module according to the divided voltage and determining the current output by the electric signal adjusting module according to the impedance of the impedance module; the output module is used for adjusting the power supply voltage output by the module and the current control voltage output by the voltage output end according to the electric signal; the control module is used for adjusting the resistance value of the at least one variable resistor according to the difference value between the power supply voltage and the preset voltage. According to the embodiment of the invention, the adjustable power supply voltage can be provided, and the universality of the motor driving device is improved.

This utility model discloses a high-voltage protection control circuit, including a first connector CN1 and a second connector CN2. Between the first connector CN1 and the second connector CN2, there are also: a second Zener diode D2, a first Zener diode D1, a second transistor Q2, a first transistor Q1, a switching transistor Q3, a voltage divider resistor R8, and a step-down chip U1. This utility model utilizes the second Zener diode D2 and the first Zener diode D1 to implement the avalanche effect, directly driving the second transistor Q2 and the first transistor Q1, and delaying overvoltage response, resulting in a significant improvement in response speed. Furthermore, the combination of the second Zener diode D2, the first Zener diode D1, the second transistor Q2, the first transistor Q1, and the switching transistor Q3 implements a complete protection function, reducing the overall circuit area and achieving high circuit integration. Moreover, it eliminates the need for a dedicated IC chip for control, reducing production costs.

The present disclosure provides a semiconductor device and an electrostatic discharge (ESD) clamp circuit. The semiconductor device includes a voltage divider, a cascoded inverter, and a discharge circuit. The voltage divider is electrically coupled between a power supply voltage and an output voltage of the semiconductor device. The cascoded inverter is electrically coupled to the voltage divider. The discharge circuit is electrically coupled to the cascoded inverter. The cascoded inverter is configured to turn on the discharge circuit o discharge an electrostatic discharge (ESD) current in response to an ESD event occurring on the power supply voltage or the output voltage when the semiconductor device is in an ESD mode.

Sensored insulation plug for a medium voltage or high-voltage separable connector in a national grid, and operable to insulate a connection element of the separable connector on an elevated voltage and to simultaneously detect and sense the elevated voltage. The sensored insulation plug comprises a) a plug body formed by a solidified insulating material, b) an externally accessible detection contact, c) a primary capacitor, operable as a high-voltage capacitor in a sensing voltage divider for sensing the elevated voltage, the primary capacitor having i) a high-voltage electrode; ii) a sensing electrode embedded in the plug body; iii) a dielectric formed by a first portion of the insulating material, and d) a testpoint capacitor, operable as a high-voltage capacitor in a detection voltage divider for detecting the elevated voltage and comprising i) the high-voltage electrode, ii) a testpoint electrode, embedded in the plug body and electrically connected to the detection contact, and iii) a dielectric formed by a second portion of the insulating material.

The utility model discloses a power device overcurrent short circuit protection circuit, which is connected between a power device driving signal circuit and a desaturation detection circuit, and comprises a first divider resistor, a second divider resistor, a first amplitude control resistor and a second amplitude control resistor which are electrically connected in sequence, the first divider resistor is connected with a power device driving signal output end of the chip; a branch of a connection point between the first amplitude control resistor and the second divider resistor is connected to a collector of the power device; a connection point between the first amplitude control resistor and the second amplitude control resistor is used as an input end of the desaturation detection circuit; according to the utility model, on the basis of realizing the desaturation detection circuit, the fine tuning effect of blanking time (namely, the anti-noise time delay can be controlled) is realized at the same time, and the driving structure cost is obviously reduced on the premise of ensuring the driving reliability of the power device without depending on the DESAT function pin of the driving chip.

Inverter control device (1), comprising: a main control circuit (11) which applies a control voltage to a semiconductor switching element (SW) provided in an inverter output stage and controls a current delivery to a load, thereby switching the semiconductor switching element (SW) on and off, wherein the semiconductor switching element (SW) is switched off when a control unit of the inverter control device detects an overcurrent; a clamping diode (ZD) that clamps a voltage of an electromotive counterforce applied to the semiconductor switching element (SW) when the operation of the main control circuit (11) stops; a voltage divider resistor (RA, RB) that resistively divides and detects a voltage proportional to a current flowing through the clamping diode (ZD) when the electromotive force voltage is clamped; and an auxiliary control circuit (12) which generates a control voltage according to the voltage detected by the voltage divider resistor (RA, RB), wherein the control voltage switches on the semiconductor switching element (SW) in an abnormal condition of the inverter, wherein when the auxiliary control circuit (12) generates the control voltage which switches on the semiconductor switching element (SW), a control voltage is applied to the semiconductor switching element (SW) as a drive voltage, wherein the drive voltage is divided via an internal impedance (RG) of the main control circuit (11) and via an output resistance (R1) of the auxiliary control circuit (12).