1377 results about "Voltage generator" patented technology

The present invention relates to the technical field of circuit control, and relates to a direct-current high-voltage generator regulation and control method and system based on intelligent feedback. A fuzzy control logic operation is performed on an output current flux value and an input voltage fluctuation factor of a load experimental object, so as to obtain the disturbance amplitude of a voltage fluctuation state for a current flux change trend; if a step-up transformer can execute a PID control technology by adjusting a transformation ratio, PID real-time adjustment parameters are calculated, and a crossover mutation operation of individuals is performed on the basis of a fitness function, so as to generate a first boost regulation and control scheme; and if the step-up transformer cannot execute the PID control technology by adjusting the transformation ratio, a calibrated state feedback controller is constructed on the basis of a state variable of the current step-up transformer and an adjustment signal output amplitude, so as to generate a second boost regulation and control scheme. The present invention achieves intelligent feedback regulation and control by independently analyzing components of direct-current high-voltage generators, improving the stability and accuracy of outputting high-voltage direct current.

The invention discloses a partial discharge and breakdown combined test system and test method under wide temperature range and variable air pressure, which are suitable for evaluating the insulating properties of insulating materials, cables and power equipment under high and low temperature and different air pressure conditions. The system comprises a vacuum oven, a partial discharge and withstand voltage breakdown joint test module, an explosion-proof cable joint, a control module and a detection module, the vacuum oven can realize temperature regulation and control from-70 DEG C to + 200 DEG C and an air pressure environment of 10 <-3 > Pa, and the test module integrates a high voltage generator, a coaxial electrode and a partial discharge sensor. Partial discharge detection and breakdown voltage measurement can be completed in the same test environment. According to the test method, the electrical response characteristics of the insulating material under different working conditions are obtained through regulation and control of environment temperature and pressure, execution of a test process and data acquisition and analysis. The device is compact in structure and high in safety, and has the capabilities of joint testing, high-precision regulation and control and adaptability to complex environments.

A programmable driver circuit (54) and related method (600) for simultaneously controlling multiple tunable probabilistic bit generators are disclosed. The driver circuit comprises a plurality of programmable voltage generators (52; 30), a programming unit (35) and a non-volatile memory unit (34a-b). Input terminals of the plurality of programmable voltage generators are jointly connectible to a single voltage supply source. The programming unit is configured to generate a sequence of programming pulses for the different voltage generators. Each voltage generator comprises a single-stage or multi-stage voltage divider circuit (31) formed by a series of resistive elements (32-1; 32-2; 33). The non-volatile memory unit (34a-b) comprises at least the resistive element positioned first in the series of resistive elements as a programmable resistance and a program control transistor (34-1) connected in series between the programmable resistance and a fixed reference voltage. A control gate of the program control transistor is operatively coupled to the programming unit to receive the sequence of programming pulses for the programmable voltage generator when operated in a programming mode.

A power conversion device includes a neutral point clamped multilevel power converter and a control device. The control device includes a modulation voltage generator which generates modulation phase voltage commands using phase voltage commands and phase currents, and a PWM modulator which generates gate signals for driving the power converter, using the modulation phase voltage commands. The modulation voltage generator calculates offset voltage so that, for a middle phase in which a high-low rank is middle among the phase voltage commands for respective phases, a polarity of the phase voltage command does not become opposite to a polarity of the phase current, and superimposes the offset voltage as first common voltage on the phase voltage commands for respective phases, to generate the modulation phase voltage commands.

A structure includes a level shifter, first and second variable voltage generators, and a programmable voltage generator. The level shifter includes low and high supply voltage nodes and two parallel branches, including multiple transistors, connected between the nodes. The programmable voltage generator generates and applies a high supply voltage (VH) to the high supply voltage node. VH is programmable to one of multiple possible VH levels. Based on the voltage level of VH, the first variable voltage generator generates and applies a low supply voltage (VL) to the low supply voltage node and the second variable voltage generator generates and applies a gate bias voltage (VGB) to gates of some transistors. By tracking VH and adjusting VL and VGB based on thereon, the voltage level shifter operates within the SOA at high VHs, remains operable at low VHs, and maintains operating speed at mid-level VHs.

The invention provides a device and method for testing the reliability of a power sensor, and the device comprises a magnetic field generation unit which is used for providing an alternating current for a Helmholtz coil through a power frequency current source, and generating a controllable magnetic field; the electric field generating unit is used for providing a high-voltage direct current or power frequency alternating current power supply for the parallel-plate capacitor through a high-voltage generator to generate a uniform electric field; the tested unit is used for providing a standard excitation signal through a standard source matched with the to-be-tested sensor, simulating an input condition of the to-be-tested sensor under an actual working condition and collecting output data of the to-be-tested sensor; and the control unit is used for setting test parameters, generating a control instruction according to the test parameters and generating a test result according to the output data. According to the device and the method, by simulating a strong magnetic field and a strong electric field environment and combining application of various measured parameters and an automatic control system, the reliability evaluation requirement of the sensor under the actual working condition is fully met.

The invention relates to a device and a method for preparing nanofiber core-spun yarn through batch coaxial electrostatic spinning. The device comprises a needleless dish-shaped spray head, an air blowing auxiliary device, a liquid supply device, an annular twisting device, a high-pressure generator, a negative-pressure air suction device, a winding device and an unwinding device. The core yarn penetrates through the axis of the needleless dish-shaped nozzle, the nanofiber generated by the needleless dish-shaped nozzle coaxially wraps the surface of the core yarn through the whole spinning device, and batch preparation can be achieved. The device is further provided with an air blowing auxiliary device and a negative pressure air suction device, under the air blowing effect of an air blowing nozzle and the adsorption effect of a negative pressure air suction shell, airflow force can be generated to promote jet flow to be further stretched in a straightened mode, under the common influence of electric field force and the airflow force, the jet flow is fully stretched, bending is reduced, and the service life of the jet flow is prolonged. Therefore, the nanofiber bundles can continuously cover the surface of the core yarn in a high-orientation state under the traction of the annular twisting device, and the continuous nanofiber core-spun yarn is formed.

The present invention provides a method of inhibiting the growth of proliferating cells or viruses in living tissue, the method comprising: applying mid-level frequency AC current electromagnetic signals to the living tissue with a transducer comprising a magnetically conductive material passing through a conduction ring energized by an electrical signal to create the mid-level frequency AC current electromagnetic signals within the living tissue; wherein the mid-level frequency AC current electromagnetic signals have a frequency in the range of about 50 kHz to about 300 kHz and are produced with an AC voltage generator; and circulating fluid in the living tissue provide a secondary coil for the transmission of the mid-level frequency AC current electromagnetic signals.

A gate driver includes a first scan signal generator configured to output a logic voltage for driving of a scan transistor through a plurality of stages connected in cascade, the scan transistor performing a switching operation to transfer a data voltage to a driving transistor of a pixel, a second scan signal generator configured to output a logic voltage for driving of a sensing transistor through the plurality of stages, the sensing transistor sensing deterioration of a light emitting element of the pixel, a light emission control signal generator configured to output a logic voltage for control of a light emission control transistor of the pixel through the plurality of stages, and an initialization voltage generator driven by logic voltages received from some nodes of the first scan signal generator based on the light emission control signal generator to supply an initialization voltage to the pixel.

The invention discloses a complex metal product internal defect analysis method and system based on radiographic inspection, a spiral track scanning path is generated through a workpiece three-dimensional model, a six-axis cooperative mechanical arm is utilized to drive a miniature X-ray source to move along the path, and + / -5 [mu] m positioning compensation is realized in combination with a piezoelectric ceramic driving mechanism. And the detector array module is matched to carry out multi-mode ray scanning and real-time data acquisition. Collected data are transmitted to a real-time data processing module through an LVDS differential interface, an FDK algorithm is executed by a JetsonTX2 embedded GPU to complete tomographic image reconstruction, a 3D-ResNet neural network model is loaded through a TensorRT inference engine to achieve intelligent defect recognition, and finally a detection report is generated and uploaded to an MES system. The system comprises a ray generation module, a multi-degree-of-freedom mechanical arm bearing module and the like, a high-voltage generator circuit comprises a ZVS resonance circuit, and a motion control module adopts an FPGA + ARM dual-core architecture.

The utility model discloses an exhaust disinfection structure of a damp and hot cleaning disinfection machine, which comprises a cleaning barrel and a machine cover, the machine cover is provided with an air inlet and an air outlet which are communicated with the cleaning barrel, and the air outlet is connected with an air disinfection treatment box through an exhaust pipe; the gas disinfection treatment box comprises a box body, the interior of the box body is divided into a first purification cavity and a second purification cavity through a primary filtering layer, an ultrasonic atomizer is arranged in the first purification cavity, and an aerosol dissolving solution or a disinfectant is added into the ultrasonic atomizer through a liquid inlet pipe; a first current-conducting plate and a second current-conducting plate which are oppositely distributed left and right are arranged in the second purification cavity, the first current-conducting plate is connected with the positive electrode of the high-voltage generator, the second current-conducting plate is connected with the negative electrode of the high-voltage generator, a plurality of discharge plates are arranged on the first current-conducting plate, a plurality of discharge needles are arranged on the discharge plates, and a plurality of adsorption plates are arranged on the second current-conducting plate. The cleaning device has the advantages of recycling and purifying aerosol in the cleaning device.

A memory device, including: a memory cell array including a plurality of cell strings; a voltage generator configured to generate a precharge voltage, a program voltage, and a negative voltage; and a control logic circuit configured to control a program operation for programming a threshold voltage of a selected memory cell to have a target state, wherein the program operation is performed using a plurality of program loops, based on a voltage increment of the program voltage, and wherein each program loop from among the plurality of program loops includes a precharge duration and a program execution duration, wherein the control logic circuit is further configured to provide the negative voltage to a plurality of unselected string select transistors and a plurality of unselected ground select transistors included in a plurality of unselected cell strings from among the plurality of cell strings, during the program execution duration.

The present invention discloses a pipeline welding processing device, which relates to the technical field of pipeline welding. The present invention includes an insulating base plate, a protective cover, a clamping part, a calibration rod and a calibration needle; the clamping part realizes stable clamping of pipelines with different diameters through a servo motor, a swing adjustment electric cylinder and clamping rollers, and accurately adjusts the pipeline axis height and the parallelism of the weld end face; the calibration needle cooperates with a high-voltage generator to judge the pipeline axis deviation through the arc distribution and assist in calibration. The device is easy to operate, can effectively improve the alignment accuracy and efficiency of pipeline welding, is applicable to various pipeline diameters, significantly reduces the difficulty of manual adjustment, ensures the welding quality, and is particularly suitable for high-precision pipeline welding scenarios.

The invention provides an X-ray high-voltage generator. The X-ray high-voltage generator comprises a resonance module; wherein the resonance module comprises a first inductor, a first capacitor and a second inductor which are connected in series at a primary winding of the high-voltage transformer; the first inductor and the second inductor form a common mode inductor, and the common mode inductor is an annular hollow inductor. According to the X-ray high-voltage generator provided by the invention, the problems of magnetic saturation risk, temperature sensitivity, magnetic core eddy current loss and the like of an existing resonance circuit are solved.

The invention belongs to the field of storage, and discloses a high-energy-efficiency mixed-precision charge domain in-storage computing architecture and a working method thereof. Comprising a single-slope analog-to-digital converter, a sparsity perception input alignment module, a multi-bit input accumulation module, a controller and an accumulation module, wherein the single-slope analog-to-digital converter consists of an index calculation array, a mantissa calculation array, a shared ramp voltage generator and a bidirectional counter. According to the invention, serial input binary coding based on capacitor voltage is suitable for floating point and integer multiply-accumulate operation with flexible bit width; according to the invention, a shared single-slope analog-to-digital converter (SS-ADC) is introduced to realize maximum index search and index difference calculation; according to the method, a sparsity perception calculation scheme is provided, low-importance input-weight pairs are filtered out through an adjustable threshold value, and invalid power consumption is reduced; according to the method, a multi-bit input accumulation method is further combined, and an ADC redundancy optimization quantization and normalization process is utilized, so that the overall energy efficiency is improved.

A semiconductor device according to an embodiment of the present disclosure includes: a memory cell array including a plurality of first selection lines extending in a first direction, a plurality of second selection lines extending in a second direction, and a plurality of memory cells each provided between the plurality of first selection lines and the plurality of second selection lines; a voltage generator that is configured to generate a selection voltage to be applied to one of the plurality of first selection lines; and a decoder section that includes a plurality of selection transistors and a gate driving section, and selects one of the plurality of first selection lines and applies the selection voltage to the selected first selection line, the plurality of selection transistors each provided in a plurality of selection paths coupling the plurality of first selection lines and the voltage generator, the gate driving section that drives gates of the plurality of transistors and is configured to apply a first driving voltage to the gates of the plurality of transistors, the first driving voltage being a positive voltage exceeding a withstand voltage of the plurality of selection transistors.

The invention discloses an electromagnetic compatibility fault prediction method for a pulse withstand voltage generator, and relates to the technical field of electromagnetic compatibility evaluation, and the method comprises the steps: collecting original signals of different circuit states of the pulse withstand voltage generator, extracting voltage ripple, current phase and magnetic field radiation frequency spectrum, and generating a time sequence monitoring data set; based on the time sequence monitoring data set, electromagnetic disturbance characteristics are extracted through deep analysis, a rule engine is built, and a fault probability and a fault type are output; triggering a plurality of suppression rules based on different fault types; after any suppression rule is executed, collecting the original signal again, and inputting the original signal into a pre-constructed risk assessment model to generate an interference suppression efficiency index; comparing the interference suppression efficiency index with a preset efficiency threshold value; if the interference suppression efficiency index is lower than the efficiency threshold value, generating a strategy compensation instruction and feeding the strategy compensation instruction back to the corresponding suppression step to iterate and adjust parameters; the electromagnetic interference suppression effect is improved.

A display device includes a pixel array including a plurality of pixels connected to a plurality of source lines, a voltage generator configured to generate a reference voltage, and a source driver configured to output a first source signal corresponding to a first source line among the plurality of source lines, receive a first return signal corresponding to the first source signal through a second source line positioned adjacent to the first source line, and generate a first count value based on a first comparison result of the first return signal and the reference voltage.

The invention relates to the technical field of high-voltage insulation prediction, in particular to a pilot channel electron density diagnosis system and method based on a slit spectrum, and the system comprises an impulse voltage generator, a high-voltage electrode, a condensing lens, a slit, a first collimating lens, a second collimating lens, a VPHG, a high-speed camera, an electro-optical converter, a photoelectric converter, an oscilloscope, and a computer. According to the invention, the electron density in the pilot channel is accurately obtained, the evolution characteristics of physical characteristic parameters in the pilot channel in the long-gap discharge process can be effectively described, and high-precision calculation of the electron density can be realized without measuring the temperature; compared with the prior art, the method has the advantages that the time resolution and the space resolution are improved, the high diagnosis precision is ensured, the monitoring capability of the electron density change in the pilot discharge channel is enhanced, the change of the electron density can be effectively monitored in time and space, and the physical mechanism and characteristics in the pilot discharge process can be deeply understood.

A method of operating a non-volatile memory including an unselected word line is provided. A first voltage rising at a first slope is applied by a voltage generator to the unselected word line. Outputting the first voltage is stopped by the voltage generator in response to that the first voltage rises to a predetermined voltage, wherein the predetermined voltage is higher than a pass voltage. The pass voltage is outputted by the voltage generator to the unselected word line.

The disclosure provides a voltage regulator and a memory device. The voltage regulator includes a voltage generator and a bias circuit. The bias circuit dynamically adjusts a bias voltage based on a power saving mode signal of the memory device. The voltage generator adjusts a bias current of the voltage generator based on the bias voltage, wherein the bias current affects a slew rate of a target voltage. The voltage generator generates the target voltage to a driving circuit configured to drive a memory cell array in the memory device.

A voltage generator including an LDO (low dropout) regulator that supplies a current to an internal voltage node of a sense amplification circuit as feedback control based on a voltage level of the internal voltage node; and a power switch circuit including a plurality of power switches each having one end connected to an external voltage and an opposite end connected to the internal voltage node, and that supplies the current to the internal voltage node as feed-forward control based on a known number of sense amplifiers to be activated. The voltage generator may efficiently supply current according to an operation mode of the sense amplification circuit.

A display device includes a display panel including pixels, a power voltage generator which provides a power voltage to the display panel, a power current sensor which senses a power current of the display panel and generates a power current code by performing analog-to-digital conversion on the sensed power current, and a timing controller which determines an analog-to-digital conversion time of the power current based on a peak white luminance.

The invention discloses a vehicle-mounted high-power power supply and distribution system and method, and the method comprises the steps: enabling one end of an engine to be provided with a transmission wheel train and a high-voltage generator during the running process of a vehicle, and enabling the output rotating speed of the engine to be improved to the rated rotating speed of the high-voltage generator through the transmission wheel train; high-voltage direct current output by the generator drives a high-voltage electric appliance to work after being subjected to voltage stabilization and filtering by the high-voltage distribution box; when an automobile is parked and a mains supply is used, alternating-current mains supply is inverted into direct-current power through the high-voltage distribution box to drive a high-voltage electric appliance to work. The defects that a traditional vehicle cannot run and cannot supply power in a high-power mode under the parking condition can be overcome, especially the technical problem of power supply under the parking condition is solved, software system adaptation development is carried out through the comprehensive technical scheme of a high-power high-voltage silicon generator, mains supply inversion, power supply filtering and the like in combination with post-stage power utilization characteristics, and the power supply efficiency is improved. And stable power supply of the air-conditioning system under running and parking conditions is ensured.

The invention relates to a passive wireless temperature sensor circuit, which comprises a transceiving antenna, an RF-DC rectifier circuit, a temperature sensing circuit and a backscatter circuit, the RF-DC rectifier circuit receives external radio frequency energy based on the transmit-receive antenna and then outputs direct current for power supply. The temperature sensing circuit comprises a complementary absolute temperature voltage generator and a ring oscillator; the complementary absolute temperature voltage generator comprises an MOS tube and generates CTAT voltage based on temperature characteristics of the MOS tube. The ring oscillator converts the CTAT voltage into an oscillation frequency signal of the ring oscillator and then outputs a square wave frequency signal with a negative temperature coefficient; the backscattering circuit backscatters the square wave frequency signal through the transceiving antenna; the CTAT key generation circuit built by the MOS tube generates CTAT voltage, a temperature frequency conversion chain is built through the CTAT voltage and the ring oscillator, temperature information is converted into frequency information of the oscillator, the power consumption of the temperature sensing circuit can be effectively reduced, and meanwhile the voltage coefficient of the CTAT voltage is increased by combining the temperature characteristic of the MOS tube.

A display device includes a display panel including a sub-pixel, a gate driver which provides a gate signal to the sub-pixel, a data driver which provides a data voltage to the sub-pixel, a driving voltage generator which provides a gamma reference voltage including a black data voltage to the data driver, and a driving controller which determines an offset voltage of the black data voltage based on at least one selected from a driving frequency, a dimming level, and a temperature.

A display panel of a display device includes a pixel, a gamma voltage generator, and a driver. The gamma voltage generator generates gammas voltages. The driver converts a grayscale value of image data into a voltage value, using a gamma lookup table corresponding to an input luminance value, and provides the display panel a data voltage corresponding to a gamma voltage among the gamma voltages, where the data voltage corresponds to the voltage value. The driver selects a first gamma lookup table and a second gamma lookup table from among predetermined gamma lookup tables corresponding to representative luminance values, based on the input luminance value, calculates a third gamma lookup table for the input luminance value by linearly interpolating the first gamma lookup table and the second gamma lookup table, and generates the gamma lookup table based on the third gamma lookup table.

The invention provides a display device and a method of driving a display panel. The display device includes: a display panel including pixels and configured to display an image based on input image data; a gate driver configured to output a gate signal to the pixel; a data driver configured to output a data voltage to the pixels; and a gamma reference voltage generator including a gamma bias circuit configured to generate a bias current based on a gamma voltage range from a voltage level corresponding to the zero gray level to a voltage level corresponding to the set brightness, and a gamma amplification circuit configured to receive the bias current, the gamma reference voltage generator is configured to generate a gamma reference voltage and output the gamma reference voltage to the data driver.

The invention provides a fault analysis method and system for a direct current converter valve, and the method comprises the steps: applying a test voltage to the direct current converter valve through a voltage generator, and collecting the voltage of each potential sampling point in the direct current converter valve; and performing fault analysis on the direct current converter valve based on the voltage of each potential sampling point. According to the method, the potential distribution testing electrical model of each type of testing voltage is established, a potential distribution theoretical calculation method and potential distribution abnormity reason analysis are provided, and targeted testing and analysis are realized, the correctness of converter valve design is checked, and the circuit abnormity reason is analyzed.

A display device including a display panel including data lines, gate lines, power lines, and sub-pixels; a gate driver to supply a gate signal to the gate lines; a data driver configured to supply a data voltage to the data lines during a refresh frame period prior to a hold frame period; and a compensation voltage generator configured to during the hold frame period, output a first compensation voltage to the data lines instead of the data voltage supplied by the data driver, and output a second compensation voltage and a third compensation voltage to the power lines connected to the sub-pixels, and during the refresh frame period, output the second compensation voltage and the third compensation voltage to the power lines without outputting the first compensation voltage.