1966 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.

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.

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.

Wireless circuitry is provided that includes a radio-frequency amplifier or mixer, a power detector coupled to an input or an output of the radio-frequency amplifier or mixer, and a transimpedance amplifier coupled to an output of the power detector. The transimpedance amplifier can be implemented as a class A amplifier, a class AB amplifier, or an enhanced class AB amplifier. The power detector can include an input transistor having a gate terminal configured to receive a radio-frequency signal, a bias transistor, and a voltage generator configured to apply a calibration voltage to a gate terminal of the bias transistor to mitigate a direct current (DC) offset associated with the power detector.

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 belongs to the field of integrated circuits, and particularly relates to a CIM (common information model) circuit for random computation and an MAC (media access control) operational circuit suitable for machine learning training, and the CIM circuit comprises a storage computation array, a random quantization circuit and a peripheral circuit. Wherein the storage and calculation array adopts an SRAM (Static Random Access Memory) array with data storage and logical operation functions. The random quantization circuit comprises a random voltage generator, a twin comparator array, a random accumulation circuit and a transcoding circuit. The random voltage generator generates a random voltage, the twin comparator array generates a random bit stream of an operation result output by the SRAM array by using the random voltage, and the random accumulation circuit accumulates a product result in a random domain according to each random bit stream; and the transcoding circuit transcodes the random bit stream of the final result into a corresponding numerical value. The invention also introduces a transposition design to realize more efficient full parallel operation. According to the CIM circuit, the problems of low area efficiency and high power consumption of various existing CIM circuits adopting full adders are solved.

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.

Wireless circuitry is provided that includes a transformer having a primary coil and a secondary coil, a first group of switchable capacitors coupled to a first terminal of the primary coil, a second group of switchable capacitors coupled to a second terminal of the primary coil, and capacitance measurement circuitry selectively coupled to a center tap of the primary coil during a measurement mode. The capacitance measurement circuitry can include a current source, a current sink, a comparator, a voltage generator for providing one or more threshold / reference voltages to the comparator, a frequency measurement circuit, and a capacitance calculation circuit configured to compute a capacitance of the first and second groups of switchable capacitors.

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.

The invention relates to the field of electrical equipment fault detection, in particular to a fault detection method and system for high-voltage test equipment, and the method comprises the steps: preliminarily recognizing time periods in which transient faults possibly exist through frequency domain analysis, extracting voltage transient features in the time periods in combination with time domain analysis, and carrying out the fault confirmation through current features. And feature vectors at fault moments are constructed for dimensionality reduction processing and are used for classification model training. And finally, realizing real-time fault detection of the direct-current high-voltage generator based on the trained classification model. According to the method, the real-time transient fault detection of the direct-current high-voltage generator is realized through voltage and current feature extraction and SVM classification in a mode of combining frequency domain and time domain analysis.

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 utility model discloses a high-pressure microcapsule filling machine and relates to the technical field of microcapsule forming devices. A positive electrode connecting wire and a negative electrode connecting wire are arranged on one side of the high-voltage generator; a measuring cup and a magnetic stirrer are arranged on the bottom frame; the magnetic stirrer is arranged at the bottom of the measuring cup; a fixed block is arranged on the bottom frame, a fixed rod is arranged on the fixed block, and a movable block is arranged on the fixed rod in a sliding fit manner. An injector is placed between the arc-shaped plates on the two sides, a needle at the bottom of the injector penetrates through the placing ring to press the injector downwards, the arc-shaped plates are driven by the connecting frames on the two sides to clamp and fix the injector, and injectors of different specifications can be clamped and fixed. Under the action of extrusion of the propeller on the push rod of the injector and electric field force, the solution in the injector drips into the solution in the measuring cup, so that microcapsules with different particle sizes can be selectively prepared according to liquid components, the magnetic stirrer can be dispersed in the generated microcapsule particles in the measuring cup, and finally the microcapsule particles with uniform size and uniform particle size can be formed. The microcapsule is spherical and has a smooth surface.

A time-to-digital converter (TDC) that combines the energy efficiency of a successive approximation (SAR) design with the high speed of pipelined converters by leveraging the inherently pipelined nature of time-domain signaling. The TDC achieves high speed by removing a comparator decision from a signal path, instead using AND / OR gates to separate early and late edges. The TDC uses a pipelined SAR architecture to digitize a differential delay between two incoming clock edges with high speed and low power consumption. Described is a modular digital reference voltage generator that can be used for a capacitive digital-to-analog converter (DAC). The generator comprises a decoupling capacitor, one or more clocked comparators, and power transistor(s). A simplified digital low dropout (LDO) circuitry is used to provide fast reference voltage generation with minimal overhead. The LDO circuitry is arrayed using time-interleaved synchronous clocks or staggered asynchronous clocks to provide finer timing resolution.

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.

A method detects an electrical insulation fault between an electric power source and an electrical ground, via a circuit that includes a controllable voltage generator and an electrical measuring resistor connected in series between a terminal of the electric power source and the electrical ground. The method includes controlling the voltage generator to establish, between its terminals, a non-zero voltage value, and measuring the voltage at the terminals of the electrical measuring resistor to detect an electrical insulation fault between the electric power source and the electrical ground. The method further includes a computer determining, depending at least on the voltage measured at the terminals of the electrical measuring resistor, at least two parameters characteristic of a disturbance affecting the detection of the electrical insulation fault, and calculating a reliability level of the detection of the electrical insulation fault depending on at least one of the two parameters.

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 circuit for monitoring an actual threshold voltage value of a MOSFET is provided. The circuit includes a current source configured to be coupled to a source terminal of the MOSFET and to generate a test current; a voltage generator configured to be coupled between a gate terminal of the MOSFET and the source terminal of the MOSFET, and to generate a test voltage, said test voltage being lower than a nominal threshold voltage value of the MOSFET; a detection unit configured to sample a plurality of voltage value at the source terminal of the MOSFET during time, to compute as a function of said plurality of voltage value at least a value of voltage variation over time, in particular over a given time period, of said voltage value at the source terminal of the MOSFET, and to provide said computed at least a value of voltage variation to an alarm generation unit; the alarm generation unit being configured to receive said computed voltage variation from the detection unit, to compare said computed voltage variation with a reference voltage, and to raise an alarm if the output of said comparison does not correspond to a predetermined output condition; and a control unit, configured to receive a test mode signal, indicative of an operation mode. The control unit is further configured to, according to said received test mode signal, select the status of coupling or decoupling of said current source to / from the source terminal of the MOSFET, determine the value of said reference voltage, set said output condition of said comparison, and signal to the detection unit to perform a plurality of said sampling operation.

An apparatus, including: a first signal receiver circuit including: a first reference voltage generator configured to generate a first reference voltage that tracks noise present in a supply voltage used to generate a first single-ended signal; and a first comparator configured to generate a first signal based on a comparison of the first single-ended signal and the first reference voltage.

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.

To prevent a situation in which overcurrent flows and an overcurrent protection function is actuated, during setting of an initial value of applied voltage to be applied to an image carrier.SOLUTION: An image forming apparatus has: a voltage generation unit that generates applied voltage in which AC voltage is superimposed on DC voltage; an image carrier on which an electrostatic latent image is formed; a charging member that electrostatically charges the image carrier on the basis of the applied voltage from the voltage generation unit; a current detection unit that detects current flowing from the voltage generation unit to the image carrier; a storage unit that stores a previous voltage value indicating the value of the applied voltage in the previous charging of the image carrier; and a control unit that controls the operation of the voltage generation unit on the basis of the current detected by the current detection unit. When the previous voltage value stored in the storage unit is equal to or more than a reference value during setting of an initial value of the applied voltage, the control unit sets the initial value to the reference value.SELECTED DRAWING: Figure 3