2998 results about "Voltage regulator" patented technology

The invention relates to the technical field of capacitive touch screens, in particular to a static elimination method and system for a touch screen and a medium. The method comprises the following steps: sampling real-time touch pressure distribution data of a touch screen, and identifying a high-frequency interaction screen area of a user according to the real-time touch pressure distribution data; evaluating a current operation static accumulation risk according to the user high-frequency interaction screen area, and generating a compensation static accumulation prediction value; performing circuit coordinated adjustment parameter processing according to the compensation static accumulation predicted value to construct an energy coordinated absorption strategy; performing static active absorption control according to an energy coordination absorption strategy, and generating a screen comprehensive charge safety index; touch sensitivity parameters are adjusted according to the screen comprehensive charge safety index, so that collaborative elimination and dynamic balance maintenance of static electricity accumulated on the surface of the touch screen are achieved. According to the invention, energy coordination absorption is carried out based on TVS tube-voltage stabilizer linkage, and static elimination of the touch screen is realized.

The invention discloses a linearity closed-loop optimization method for a semiconductor gas sensor with adjustable voltage dynamic compensation, which relates to the technical field of gas detection and comprises the following steps: controlling the semiconductor gas sensor to start in a clean air environment, outputting an initial test voltage sequence through a voltage regulator, the method comprises the steps of collecting sensor reference resistance under different voltages, screening out initial working voltage with the minimum resistance fluctuation quantity, synchronously collecting initial environment temperature and humidity, and calibrating the sensor reference resistance based on preset temperature and resistance coefficients and humidity and resistance coefficients to obtain initial reference resistance. By dynamically adjusting the working voltage and combining real-time compensation on the environment temperature and humidity, the interference of environment factor fluctuation on the resistance characteristic of the sensitive material can be continuously counteracted, so that the linear relation between the output signal of the sensor and the target gas concentration is kept stable, the dynamic optimization of the linearity in a complex environment is realized, and the sensitivity of the sensor is improved. And more reliable basic data is provided for gas concentration detection in an industrial scene.

A linear voltage regulator includes a converter circuit that provides a serial bitstream having a pulse density that is indicative of a difference between a regulated voltage of the linear voltage regulator and a reference voltage. The linear voltage regulator also includes a digital to analog converter circuit that includes an input to receive the serial bitstream. The digital to analog converter circuit includes an averager circuit that produces an output signal to control a voltage of a control terminal of a power transistor of the linear voltage regulator for regulating the regulated voltage based on the pulse density of the serial bitstream.

The invention provides a three-loop on-chip integrated low-dropout linear voltage regulator, which comprises a three-port source follower type voltage follower, which comprises a first anti-phase end, a normal phase end, a second anti-phase end and a first output end; the error amplifier is used for comparing a reference voltage with an output voltage so as to provide a first control signal for the first anti-phase end; the self-feedback bias module is used for receiving an internal voltage signal of the three-port source follower type voltage follower so as to provide a second control signal for the second anti-phase end; the grid electrode of the power tube is connected with the output end, the source electrode is connected with the power supply voltage, and the drain electrode serves as a second output end and is used for receiving the adjusting signal output by the first output end; the output driving current of the power tube is adjusted based on the adjusting signal; and the bias module is used for providing bias voltage for the three-port source follower type voltage follower and the error amplifier. The transient response performance of the voltage stabilizer can be improved under the condition of no off-chip large capacitance.

Methods and systems for performing current sense compensation for one or more power stages in a multiphase voltage regulator are described. A controller can be connected to a plurality of power stages through a communication interface. The controller can generate a data packet including a command to obtain temperature information and an address that identifies a specific power stage among the plurality of power stages. The controller can send the data packet to the plurality of power stages using the communication interface. The controller can receive temperature information of the specific power stage from the specific power stage through the communication interface. The controller can compensate a sensed current of the specific power stage based on the received temperature information of the specific power stage.

A control device for a switching voltage regulator includes: a first detector of a first measurement signal indicative of a current flowing in a first side of the regulator, and providing a first comparison signal as a function of a first threshold; a second detector of a second measurement signal indicative of a current flowing in a second side of the regulator, and providing a second comparison signal as a function of a second threshold; a driving-signal generation circuit which generates a switching control signal from the first comparison signal to drive the switching circuit; a calibration circuit which receives an alert signal indicative of the first threshold, compares the alert signal and the second comparison signal, and provides a calibration signal in response; and a feedback circuit which provides a control signal as a function of an error signal and of the calibration signal.

The invention discloses an LDO (Low Dropout Regulator) linear voltage stabilizing circuit, and relates to the technical field of LDO linear voltage stabilization, and the LDO linear voltage stabilizing circuit comprises a comparison output module which is used for comparing a received reference voltage with a feedback voltage so as to generate and output an error signal; the buffer driving module receives the error signal and carries out amplification and buffer processing so as to generate and output a driving signal. The first compensation module generates a first compensation signal according to the load current and the sampling current so as to dynamically adjust the amplitude and / or phase of the driving signal; the power switch module controls the on-off of a switch according to the received driving signal, and further adjusts the magnitude of voltage output to a load; the feedback module detects the voltage of the load and outputs the voltage to the comparison output module. Therefore, the first compensation module generates the first compensation signal according to the dynamic change of the feedback load current and the load capacitance, so as to dynamically adjust the amplitude and / or phase of the driving signal output to the power switch module, and ensure the stability of a circuit loop.

A driver circuit for controlling a high-power switch. The driver circuit comprises a flyback converter having a positive output rail and a negative output. The driver circuit also comprises: a driving stage that is connected between the positive output rail and the negative output rail; a shunt regulator configured to regulate the negative output voltage on the negative output rail based on a difference between the negative output voltage and a target negative voltage value, wherein the shunt regulator is powered by the positive output voltage on the positive output rail; a short-circuit transistor having a conduction channel that is connected between the negative output rail and a ground terminal; and a regulation control circuit configured to: provide a short-circuit control signal to a control terminal of the short-circuit transistor in order to short the negative output rail to the ground terminal until the positive output voltage reaches a positive threshold.

According to the heterogeneous multi-core chip power consumption state control system and the heterogeneous multi-core chip provided by the invention, the power consumption state request of each sub power supply domain is received through the set system hardware power consumption management module, and the driving signal is sent to the corresponding sub power supply domain according to the preset hardware time sequence, so that the corresponding sub power supply domain enters the target state; generating a PMU control signal; and the power management module drives an internal voltage regulator to execute corresponding regulation operation according to the PMU control signal. A special control processor (SCP) is not needed, the system hardware power consumption management module realized by pure hardware is adopted to directly control the power consumption state of each sub power supply domain in the heterogeneous multi-core SoC, the software processing delay is eliminated, the response speed is high, the static power consumption of the power consumption management module is remarkably reduced, and the system is particularly suitable for an ultra-low power consumption scene and has a wide application prospect. And hardware-level surge current protection is realized in a multi-core power-on process.

A trans-inductor voltage regulator (TLVR) inductor module includes: a magnetic core; a first winding embedded in the magnetic core; a second winding embedded in the magnetic core and inductively coupled to the first winding; a third winding embedded in the magnetic core; a fourth winding embedded in the magnetic core and inductively coupled to the third winding; and a first integrated metallic connector that connects the second winding and the fourth winding in a series loop. A power electronics assembly that includes the TLVR inductor module is also described.

The invention discloses an AC voltage stabilizer dynamic regulation system based on an intelligent algorithm, and relates to the technical field of AC voltage stabilizers, and the system comprises a data collection module which is used for collecting a gate voltage waveform of an IGBT of an AC voltage stabilizer and an AC voltage instantaneous value of a power grid input end of the AC voltage stabilizer; the data processing module is used for determining a first Shannon entropy value of a rising edge and a second Shannon entropy value of a falling edge of the gate voltage according to the gate voltage waveform; determining an entropy change difference quantity between the rising edge and the falling edge according to the first Shannon entropy value and the second Shannon entropy value; determining a power grid input fluctuation quantity according to the AC voltage instantaneous value; if the power grid input fluctuation quantity is smaller than a fluctuation threshold value and the entropy change difference quantity is larger than a first preset difference threshold value, generating an inversion signal compensation waveform according to the gate voltage waveform; and injecting the inverted signal compensation waveform into a PWM modulator of the AC voltage stabilizer. According to the invention, the accuracy of identifying the real disturbance caused by the external power grid of the AC voltage stabilizer is improved.

The invention discloses a synchronous generator excitation method based on mathematical modeling and gain scheduling, and relates to the technical field of synchronous generator control, and the method comprises the steps: building a synchronous generator global dynamic mathematical model comprising the electromagnetic dynamic characteristics of a stator winding, a rotor winding and a damping winding through a modeling module; a discretization simulation platform is constructed in a Matlab / Simulink environment by utilizing a simulation module, model parameters are corrected, dynamic adjustment is realized through a gain scheduling excitation controller, an automatic voltage regulator (AVR) adopts PID (Proportion Integration Differentiation) control and comprises a voltage deviation integral separation strategy, and a power system stabilizer (PSS) dynamically adjusts parameters of a lead-lag compensator based on active power. According to the method, the deviation between a model and an actual system can be reduced by more than 30%, the electromechanical oscillation damping ratio within the rated power range of 10%-150% is increased by 25%-40%, the harmonic content of exciting current is reduced to be lower than 5%, the stability of an electric power system and the electric energy quality are remarkably improved, the engineering practicability is high, and the method is easy to transform and upgrade on an existing synchronous generator.

The invention relates to the technical field of voltage control, and discloses an ESC voltage regulator voltage control method and system based on fuzzy adaptive PID, and the method comprises the steps: collecting the output voltage of an ESC voltage regulator and a preset target voltage in real time, calculating a voltage error and an error change rate after filtering, and carrying out the calculation of the error change rate; dividing fast tracking, precise adjustment and anti-interference stability maintenance stages according to errors and change rates and generating control signals, calling corresponding fuzzy rule subsets to deduce proportional, integral and differential gain adjustment amounts, generating real-time gains in combination with initial PID parameters, calculating control amounts by using position type PID based on the real-time gains, converting the control amounts into signals to drive power switch tubes, and controlling the power switch tubes. And closed-loop adjustment is formed. According to the method, the problem that a traditional control method is poor in performance under multiple working conditions is solved, cooperative control over rapid tracking, precise adjustment and anti-interference stability maintenance of the output voltage of the ESC voltage regulator is achieved, it is ensured that the ESC voltage regulator can output stable voltage under the working conditions of starting, steady-state operation and load sudden change, and the requirement for high voltage control precision and dynamic response is met.

The invention discloses an overcurrent protection control circuit of a low-dropout linear regulator and the low-dropout linear regulator, and relates to the field of voltage regulators. A first sampling module is connected with a drain electrode, a grid electrode and a source electrode of a power control tube in the low-dropout linear regulator and a first current comparator; the first current comparator is further connected with the grid electrode of the first protection switch and the input voltage end of the low dropout linear regulator, the source electrode of the first protection switch is connected with the grid electrode of the power control tube, the drain electrode of the first protection switch is grounded, and the source electrode of the power control tube is connected with the voltage output end of the low dropout linear regulator; the second sampling module is respectively connected with the drain electrode of the power control tube, the grid electrode of the power control tube and the clamping module, the clamping module is connected with the grid electrode of the second protection switch through the second current comparator and is also connected with the source electrode of the power control tube, the drain electrode of the second protection switch is grounded, and the source electrode of the second protection switch is connected with the grid electrode of the power control tube. The reliability of current limiting can be improved.

A horticultural lighting device includes an LED array with multiple LED channels of different wavelengths, each having one or more LEDs. A voltage regulator supplies at least one LED channel with a constant voltage. A processor produces a PWM signal for a driving circuit coupled with the LED channels. In some cases the processor operates a tuning circuit to adjust the constant voltage thereby adjusting an intensity of the one or more LEDs of the one or more LED channels. A lighting system has multiple lamps, each with a zero cross detector that generates a timing signal based on an AC input signal. The PWM signal of each lamp has a frequency that is a multiple of the AC frequency. A method for lighting a facility includes generating a light recipe based on sensor data with an AI engine with one or more neural networks.

An apparatus includes a transmitter, a voltage regulator, an isolator, and a test controller. The transmitter has an input, an output, and a first supply voltage terminal. The input couples to the apparatus' input terminal. The voltage regulator's input couples to a second supply voltage terminal. The voltage regulator's output couples to the first supply terminal. The first terminal of the isolator couples to the output of the transmitter. A first test controller terminal couples to the second supply voltage terminal. A second test controller terminal couples to the input terminal of the apparatus. The first control output couples to the control input of the voltage regulator. The test controller changes a logic state of a control signal at the first control output from a first logic state to a second logic state.

The invention discloses a variable frequency motor load testing device and method, and relates to the technical field of variable frequency motor testing, and the device comprises a motor testing installation platform, a fastening T-shaped bolt, two variable frequency speed regulation asynchronous motors of the same model, a drum-shaped coupler, two inverters, a rectifier, a three-phase voltage regulator, a frequency converter and an intermediate DC link. According to the invention, two frequency conversion speed regulation asynchronous motors of the same model are coaxially connected, and the power generation electric energy of the accompanying test motor is fed back to an intermediate direct current link through an inverter, so that the cyclic utilization of the electric energy and the dual-motor structural design are realized, complex load equipment does not need to be configured, and the fixed asset investment is reduced; for motors of different models, only corresponding accompanying test motors need to be replaced, the universality is improved, through voltage and current monitoring in an intermediate direct current link and motor rotating speed and torque parameter collection, and by combining a multi-dimensional performance evaluation model, precise evaluation of the motor load performance is achieved, the test efficiency is improved, and the strict test requirements are met.

A method is performed at least partially by a processor and includes, based on design specifications of a voltage regulator, determining parameters of the voltage regulator. The method further includes, based on the parameters of the voltage regulator, determining model parameters of a voltage regulator (VR) model of the voltage regulator. The VR model is free of non-linear circuit components. The method further includes performing a simulation of the voltage regulator, using the model parameters of the VR model.

The invention relates to the technical field of chip detection, and discloses a high-reliability power supply chip circuit fault detection system, which comprises a built-in self-test architecture integrated in a low dropout regulator chip, and the built-in self-test architecture is provided with a first test mode and a second test mode which are switched based on a mode switching control circuit. The detection module is used for detecting key performance parameters of an error amplifier sub-circuit in a low dropout linear regulator chip, the detection module is used for measuring the direct current loop gain, the offset voltage, the common mode rejection ratio and the power supply ripple rejection ratio of the amplifier in the first test mode, and the detection module is used for measuring the unity gain bandwidth of the amplifier in the second test mode. According to the invention, through the design of a built-in self-test architecture and two test modes, abnormal states such as differential circuit imbalance and feedback loop fault can be identified in a bare chip stage, chips with poor performance are rejected in advance, and the LDO chip is ensured to reach a ppb-magnitude high reliability standard.

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

Embodiments herein relate to a semiconductor device which includes one or more voltage regulator (VR) chiplets coupled to a package interposer, where the package interposer includes coaxial magnetic composite core inductors to provide power to one or more load die. In one possible configuration, the one or more VR chiplets are coupled to the bottom side of the package interposer, the bottom side of the package interposer is coupled to the top side of a motherboard, and the one or more load die are coupled to the top side of the package interposer. In another possible configuration, the one or more VR chiplets are coupled to the bottom side of the package interposer, the top side of the package interposer is coupled to the bottom side of a motherboard and the one or more load die are coupled to the top side of the motherboard.

A method for operating a voltage regulator is disclosed. The voltage regulator includes a first transistor and a second transistor, wherein a source of the first transistor is coupled to a supply rail, a drain of the first transistor is coupled to an output of the voltage regulator, a source of the second transistor is coupled to the output of the voltage regulator, and a drain of the second transistor is coupled to a gate of the first transistor via a feedback path. The method includes generating a current, passing the current through a resistor and a third transistor to generate a reference voltage, adjusting a resistance of the third transistor based on an output voltage at the output of the voltage regulator, and inputting the reference voltage to a gate of the second transistor.

The invention provides a turn-back overcurrent protection circuit and a linear voltage regulator, and the turn-back overcurrent protection circuit comprises a turn-back switch module which compares an output voltage with a preset voltage, and outputs a turn-back current when the output voltage is smaller than or equal to the preset voltage; and the overcurrent protection module is connected with the turn-back switch module, performs overcurrent protection on the linear voltage regulator based on the first current limiting point when the turn-back switch module does not output the turn-back current, and reduces the current limiting point from the first current limiting point to a second current limiting point based on the turn-back current when the turn-back switch module outputs the turn-back current, and over-current protection is carried out on the linear voltage regulator based on the second current limiting point. According to the invention, the problem of circuit damage caused by overlarge output current due to short circuit or overload in the prior art is solved.

Techniques for an on-memory die voltage regulator is disclosed. In the illustrative embodiment, a voltage regulator on a memory die is enabled upon receipt of a memory operation. The illustrative voltage regulator includes an analog controller that controls a shunt current based on a current output voltage of the voltage regulator. The illustrative voltage regulator also includes a digital controller that controls several switches based on the input voltage that control an effective resistance of part of the voltage regulator.

The invention discloses a digital-to-analog converter chip which comprises an analog power supply for supplying power to an analog power supply domain, a digital power supply for supplying power to a digital power supply domain and a clock power supply for supplying power to a clock power supply domain, the digital power supply domain comprises a first linear voltage regulator, and the clock power supply domain comprises a second linear voltage regulator. Power supply output ends of the analog power supply, the digital power supply and the clock power supply are respectively connected with a power supply detection circuit; the power supply detection circuit is used for outputting a power supply establishment signal; the digital power domain comprises a second AND gate unit, and the clock power domain comprises a third AND gate unit; wherein the second AND gate unit is used for enabling the first linear voltage regulator to start; and the third AND gate unit is used for enabling the second linear voltage regulator to start. The problem that in the prior art, the LDO of the digital power domain and the LDO of the clock power domain are likely to be different in voltage building time in the power-on starting process, and consequently overvoltage of a low-voltage device is caused is solved, and the reliability of a digital-to-analog converter chip is improved.

The invention belongs to the technical field of ship power distribution, and particularly discloses a double-bus redundant direct-current power distribution system for a ship. Comprising a first direct-current busbar left, a first direct-current busbar right, a second direct-current busbar left, a second direct-current busbar right, a first circuit breaker, a second circuit breaker, a lithium battery pack, a first propulsion inverter cabinet, a first daily inverter cabinet, a second propulsion inverter cabinet, a second daily inverter cabinet, a direct-current voltage stabilizer and a system charging socket box. According to the invention, through setting the first direct-current busbar left, the first direct-current busbar right, the second direct-current busbar left, the second direct-current busbar right and the switching relation thereof, and adopting an operation mode that one group of busbars works and the other group of busbars is standby, flexible and balanced distribution of a power supply and a load is realized, and all loops can work without power failure; once any busbar or branch has a fault, the standby busbar is immediately started so as to start the standby loop, so that no power loss and no power reduction of the whole ship are ensured, and all equipment and components of the whole system are subjected to redundancy design so as to ensure that the power distribution system always supplies power normally.

The invention provides a low-dropout linear voltage stabilizing circuit, a circuit system and electronic equipment, an error amplification unit performs error amplification on a first feedback voltage output by a first partial voltage feedback unit and a reference voltage according to a first bias current, and outputs an error amplification voltage. And the driving unit outputs a driving current to the control end of the power tube according to the output of the second bias current unit and the error amplification voltage so as to control the output voltage of the power tube. The state switching unit detects the decreasing amplitude of the first feedback voltage compared with the reference voltage, the decreasing amplitude is smaller than or equal to a set threshold value, the first control signal is switched to be in the first state, the second bias current unit outputs second bias current, and therefore the circuit is in a low-power-consumption mode. If the decreasing amplitude is larger than the set threshold value, the first control signal is switched to be in a second state so that the second bias current unit can output larger third bias current, the circuit can work in a normal working mode, and therefore switching between the low-power-consumption mode and the normal working mode is achieved.

The invention relates to a linear voltage regulator and electronic equipment, and belongs to the field of electronic circuits. The linear voltage regulator comprises an internal power supply module, an FVF output stage and a control module, the internal power supply module is used for outputting a stable internal power supply according to the reference voltage; the FVF output stage is used for outputting load voltage required by a load; the control module is connected with the internal power supply module and the FVF output stage, and the control module is used for controlling the output voltage of the FVF output stage to be unchanged when the power supply voltage of the linear voltage regulator changes; and when the load of the linear voltage regulator changes, the output voltage of the FVF output stage is controlled to be unchanged. A stable internal power supply is generated through the internal power supply module to supply power to the control module, so that the control module is not affected by power supply electric fluctuation, the output voltage of the FVF output stage is controlled to be unchanged when the power supply voltage of the linear voltage regulator changes and / or the load changes, and the problem that the output voltage of an existing linear voltage regulator is unstable is solved.

A multi-phase voltage regulator circuit applied in a multi-phase power converter is provided. The multi-phase voltage regulator circuit comprises multiple comparison circuits. The comparison circuits are coupled to a power output stage circuit and configured to generate multiple control signals The power output stage circuit generates multiple output currents according to the control signals. Each of the comparison circuits comprises a comparator and a correction conversion circuit. The comparator is configured to receive a compensation signal and a reference signal, and receive a correction signal through a first correction terminal and to adjust a duty cycle of a corresponding one of the control signals according to the correction signal. The correction conversion circuit is configured to generate a correction signal according to an error current. The error current represents a difference between a current threshold value and a corresponding output current for the corresponding phase.

The invention discloses an automatic voltage regulating device for a power distribution area and a control method of the automatic voltage regulating device, and belongs to the technical field of power distribution network voltage treatment. The device comprises a three-phase power supply, a power supply side input circuit, a load side output circuit, a current transformer, a single-P air switch, a power supply conversion module, a three-phase independent voltage regulation module, a main path control system, an automatic bypass control system, a gear driving module, a man-machine interaction module, a display module, a monitoring module, a mode switching module, a parameter storage module and an alarm module. The system comprises a manual adjustment execution module, a counting module, a voltage detection module, a current detection module, a 4G communication module and an over-temperature protection module. A main circuit control system depends on input and output voltage data fed back by a voltage detection module, compensation voltage U can be independently calculated for differential voltage fluctuation of L1, L2 and L3 phases, intelligent adjusting switches of all phases are driven to act accurately, and finally three-phase output voltage U2 is stabilized within an allowable range.