91 results about "High input" patented technology

The invention relates to the technical field of power management, in particular to an LDO (low dropout regulator) circuit with a wide input voltage range, which comprises a pre-voltage-stabilizing module, a band-gap reference module, an error amplification module, a voltage-stabilizing control module and a power tube, the pre-voltage-stabilizing module is used for preprocessing a wide-range input voltage into a stable low power supply voltage; the band-gap reference module is used for converting the low power supply voltage into a reference voltage; the error amplification module is used for amplifying the difference value between the reference voltage and the feedback voltage of the output circuit into a high-gain and low-noise control signal; the control signal drives the power tube after being compensated and buffered by the voltage stabilization control module, and the power tube converts the wide input voltage into an LDO output signal. Only one LDO main body circuit is adopted, the wide input voltage range can be achieved, high input voltage can be adapted, low input voltage can also be adapted, the use number of components of an LDO chip is reduced, and the occupied area of the chip is greatly reduced.

Embodiments herein describe a voltage regulator with at least one power stage (or phase) that includes circuitry for providing an efficiency mode for low power situations. For example, when an output voltage and current of the power stage is below a threshold, the voltage regulator can switch to the efficiency mode (e.g., a high efficiency mode (HEM)). When in the efficiency mode, the power stage can use a first, lower input voltage to perform pulse width modulation (PWM). However, when in a high power mode, the power stage can use a second, higher input voltage to PWM. For example, the power stage can include one or more switches for switching between the first and second input voltages to use in the different modes of operation.

A lavalier microphone has improved dynamic range. The lavalier microphone incorporates a pair of microphone transducer elements into the same housing or attached housings, with one of the microphone transducer elements being more sensitive to acoustic input than the other. The voltage signals from the respective transducer elements are processed and combined, resulting in a digital output audio signal with improved signal to noise both at lower and higher input acoustic levels.

The invention discloses a reconfigurable charge pump circuit applied to a radio frequency energy acquisition system. The reconfigurable charge pump circuit comprises a charge pump clock generation module, a multi-stage charge pump, a field effect transistor switch module, an intermediate node voltage detection module and an output voltage stabilization module, dC voltages of the radio frequency rectifier under different input power conditions are received, the DC voltages are boosted into output signals of the multi-stage charge pump through the multi-stage charge pump, and power is supplied to subsequent loads through the output voltage stabilization module; the intermediate node voltage detection module detects the node voltage between the first two stages of charge pumps and the second two stages of charge pumps, and generates different enable signals to control the field effect transistor switch module according to whether the node voltage exceeds a threshold value or not, so that switching of the charge pumps in different working stages is realized, and reconfiguration is realized. According to the invention, stable output voltage can be obtained under the conditions of low input voltage and high input voltage, good output performance is shown, and the circuit is very suitable for the condition of input power fluctuation of a radio frequency energy acquisition system.

This invention relates to the field of pulse circuit technology and discloses a high-efficiency AC power line zero-crossing detection chip, including a path selection module, a signal processing module, and a driving module. The path selection module switches the charging circuit according to the potential of the internal power supply capacitor. The signal processing module uses a feedback loop to adjust the switching level of the sampling branch and generate a zero-crossing trigger pulse signal. The driving module responds to the zero-crossing trigger pulse signal by segmentally turning on the internal power supply capacitor and the external energy supply capacitor in the initial and subsequent stages of the zero-crossing point. This invention solves the contradiction between the ultra-high input impedance sampling environment and the driving strength through a controlled hysteresis window and a segmented current injection mechanism, suppresses signal jitter, improves the timing accuracy of zero-crossing detection, and effectively reduces the static power consumption of the system.

The air conditioner comprises a refrigerant circulation loop, a condensation temperature sensor, a PFC circuit and a controller, and the controller is configured to obtain the current effective value, the voltage peak value, the condensation temperature, the compressor operation frequency and the actual bus voltage value of alternating current input voltage; determining a bus coefficient according to the current effective value and the voltage peak value, or determining a target coefficient according to the current effective value, the voltage peak value, the condensation temperature and the compressor operation frequency; determining a target bus voltage value according to the product of the voltage peak value and the target coefficient; and generating a voltage control instruction according to the target bus voltage value and the actual bus voltage value, and outputting the voltage control instruction to the PFC circuit, so that the PFC circuit controls the on-off state of an internal switching tube based on the voltage control instruction, and the actual bus voltage value reaches the target bus voltage value. The overhigh bus voltage caused by the adoption of the fixed bus voltage under the condition of light load or high input voltage is avoided, and unnecessary switching loss is inhibited.

The utility model discloses a charging and downloading integrated cabinet and a seismic exploration system, and belongs to the field of seismic exploration. The charging and downloading integrated cabinet comprises a signal source assembly and a plurality of interface circuit boards. Each interface circuit board is provided with a voltage following circuit, and the voltage following circuits are connected between the signal interface end of the signal source assembly and the seismic exploration node instrument. The voltage follower circuit has the characteristics of high input impedance and low output impedance, so that under the action of the voltage follower circuit, the acquisition test signal sent by the signal source assembly can be normally transmitted to the seismic exploration node instrument through the voltage follower circuit; in addition, it can be ensured that the abnormal voltage of the circuit station does not affect the signal source assembly, so that the signal source assembly can send a normal acquisition test signal to perform acquisition index test on other normal seismic exploration node instruments.

This application discloses a multi-inductor multi-output DC-DC voltage converter and its control method. The converter includes several basic unit modules and a charge redistribution module. The basic unit modules are connected in series and all are connected to the charge redistribution module. The method includes: based on the input voltage signal, and using the basic unit modules, sequentially and alternately magnetizing and demagnetizing a first inductor within a complete cycle to obtain the load-side output current and load-side output voltage; obtaining the first flying capacitor current and combining it with the load-side output current and load-side output voltage; and adjusting the inductor current based on the charge redistribution module to output the adjusted inductor current. The embodiments of this application enhance the ability to support higher input voltages and more output channels while reducing external components, thereby improving system conversion efficiency. This application can be widely applied to integrated circuit design technology.

The invention discloses a wide dynamic range rectifier based on an automatic power distribution mechanism. The wide dynamic range rectifier comprises a high-power sub-rectifier and a low-power sub-rectifier, the high-power sub-rectifier comprises a high-power rectification trunk and a high-power rectification branch; the low-power sub-rectifier comprises a low-power rectification trunk and a low-power rectification branch; through the synergistic effect of a threshold switch control circuit and a tunable matching network arranged in a low-power rectification branch, the low-power rectification branch provides inductive impedance in a low-power state to compensate the inherent capacitive impedance of a low-power rectification diode, and presents a high-impedance state in a high-power state to turn off a low-power sub-rectifier. Therefore, the adverse effect of the low-power sub-rectifiers on the high-power sub-rectifiers is avoided while high-efficiency energy conversion in the low-power interval is ensured, and the overall rectification efficiency in the high-input power interval is remarkably improved.

This invention belongs to the field of random number generator technology, and relates to a true random number generator based on volatile memristors and a method for fabricating memristors. The method includes an entropy generation unit and a bit extraction unit. The entropy generation unit includes two or more volatile memristors connected in parallel, one end of which is connected to the input voltage, and the other end is connected in series with a load resistor and then grounded. The entropy generation unit exhibits spontaneous bistable switching behavior under high input voltage. The bit extraction unit includes a T flip-flop connected between the load resistor and the parallel volatile memristors, used to sample oscillation signals and generate a usable random bit stream. Its advantages are that it simplifies the circuit structure of the true random number generator, achieves a high random bit generation rate, and achieves extremely high energy efficiency.

The invention discloses a driving-stage power supply circuit, a control method and a switching power supply. The circuit comprises a bias current module, a sampling module, a current-to-voltage conversion module, a high-input-voltage power supply module and a low-input-voltage power supply module. And switching the low input voltage power supply module or the high input voltage power supply module to work according to the input voltage of the input end of the driving stage power supply circuit and a preset threshold voltage. The area of a switching tube in the high-input-voltage power supply module can be greatly reduced by adjusting the reference voltage through the sampling module, so that the chip cost is reduced, the switching of power supply modes can be realized by switching the low-input-voltage power supply module or the high-input-voltage power supply module, the wide input voltage range is finally realized, and the power supply efficiency is improved. The invention discloses a power supply structure with fast load transient response.

This invention discloses a voltage regulator circuit based on current feedback; it includes a sampling module, an adjustment module, and a feedback control module, specifically including high-voltage MOSFETs HV_PM1, HV_PM2, HV_PM3, and HV_NM1, constant-voltage MOSFETs NM1, NM2, NM3, and NM4, a Zener diode Z1, resistors R0, R1, and R3, and bias currents I1, I2, and I3. This invention operates when the input voltage is lower than the reverse breakdown voltage V of the Zener diode Z1. Z1 When the input voltage is high, the output voltage equals the input voltage, resulting in a small voltage drop. At high input voltages, the current flowing through the Zener diode Z1 is sampled, and the gate-source voltage difference of the MOSFET is adjusted via a feedback loop. This changes the on-resistance of the MOSFET, stabilizing the output voltage VOUT at the reverse breakdown voltage V0 of the Zener diode Z1. Z1 Approximately 5.5V.

The invention provides a high-voltage comparator, a chip and electronic equipment. The high-voltage comparator comprises a first PMOS tube, a second PMOS tube, a first current source, a clamping circuit and a load circuit, and the clamping circuit receives high-voltage power supply and is connected with the positive phase input end of the high-voltage comparator, the negative phase input end of the high-voltage comparator, the source electrode of the first PMOS tube and the source electrode of the second PMOS tube. The drain electrode of the first PMOS transistor and the drain electrode of the second PMOS transistor are connected with a load circuit so as to output a comparison result signal. The clamping circuit is configured to work when the voltage difference of input signals of the positive phase input end and the negative phase input end exceeds a preset voltage threshold value so as to enable the gate-source voltage of the first PMOS tube and the gate-source voltage of the second PMOS tube to be within a safe range. The invention has the advantages of high input impedance, support of high-voltage wide input range, simple structure, small consumption area, high comparison speed, no need of parasitic diode and the like.

The invention provides an electricity storage device and method and a storage medium, and relates to the technical field of energy storage. The power storage device comprises an input power supply module, a central control module, a power storage module and a load module. The input power supply module is used for accessing an external power supply; the central control module is used for performing power judgment on the external power supply to obtain a power judgment result; the power storage module is used for carrying out storage and power conversion on the input electric energy provided by the external power supply according to the power judgment result to obtain power supply electric energy for supplying power to a load by output power; and the load module is used for consuming the power supply electric energy according to the output power. According to the invention, the problems of high input power demand and poor power supply electric energy quality of the existing power storage device are effectively solved.

The invention discloses a broadband amplitude limiting module with low reflection after overvoltage. The broadband amplitude limiting module comprises an impedance matching circuit, a high-input impedance amplifying circuit and a low-frequency gain control circuit, wherein the impedance matching circuit is used for performing 50 omega termination matching between an input signal and the high input impedance amplification circuit, and in the high input impedance amplification circuit, a low and medium frequency signal fed back by the low frequency gain control circuit and a high frequency signal coupled by the high frequency coupling capacitor are synthesized and then input to the differential operation amplification circuit; therefore, the problem of reflection caused by overvoltage in the circuit is solved, and the waveform quality of a signal path is ensured.

The invention provides a hydraulic servo valve control system which comprises a single chip microcomputer used for conducting steady state control on the operation process of hydraulic equipment. The power supply voltage reduction module is used for connecting an external power supply and providing a stabilized power supply for system work; the servo valve output module is electrically connected with the single-chip microcomputer, and the AD sampling module is electrically connected with the single-chip microcomputer and used for preventing the single-chip microcomputer from being burnt due to too high input voltage; and the 485 communication module is connected with the single chip microcomputer and is used for receiving and sending data. Based on the STM32F030 single-chip microcomputer, digital quantity PI calculation real-time control is adopted, a traditional analog quantity control mode is replaced, remote communication is achieved through the 485 communication module, networking control can be achieved, and the system is more intelligent and user-friendly.

We provide a physical secondary battery that offers high safety, high input / output performance, high capacity, and the ability to be made small and lightweight. [Solution] A physical secondary battery 100 comprising a first electrode 10, a second electrode 20, a p-type semiconductor layer 30 provided between the first electrode 10 and the second electrode 20, an n-type semiconductor layer 80 provided between the p-type semiconductor layer 30 and the second electrode 20 and having a thickness thinner than the p-type semiconductor layer 30, and a dielectric layer 90 provided between the p-type semiconductor layer 30 and the n-type semiconductor layer 80, wherein the p-type semiconductor layer 30 has a thickness of 100 nm or less.

The invention discloses a power management circuit with a clamping function, belongs to the technical field of power management, and aims to solve the problems that a high-voltage-resistant device of an existing circuit is high in cost and has no active clamping quick-wear part. The circuit comprises a clamping module, a step-down conversion module, a step-up conversion module, an enabling control module and a charging module. The clamping module is connected with an input voltage VIN and a system power supply end VSYS, and the VSYS is clamped to Vmax or synchronously output along with the VIN according to the relation between the VIN and a preset voltage Vmax; the step-down conversion module is used for reducing the voltage of the VSYS into low-voltage direct-current voltage OUTD; when the VIN is powered down, the boost conversion module boosts the energy of the energy storage element into Vmax and transmits the Vmax to the VSYS, and the enabling control module controls the VIN to start and stop according to the state of the VIN; when the VIN is electrified, the charging module charges the energy storage element through the OUTD. According to the circuit, the circuit cost can be greatly reduced, overvoltage damage of downstream devices caused by too high input voltage is avoided, and meanwhile, the circuit is adaptive to a wide-range input voltage scene.

The invention relates to a driver circuit for driving a voltage-controlled electro-optical modulator by providing an output voltage to the electro-optical modulator in dependence on an input voltage. The driver circuit comprises a supply input for receiving a direct supply voltage having a positive supply voltage level and an input for receiving the input voltage, wherein the input voltage varies between a low input level and a high input level. The driver circuit further comprises a level shifter circuit comprising two capacitors and being electrically connected to the input, and a voltage distribution circuit electrically connected between the level shifter circuit and an output of the driver circuit for providing the output voltage. The level shifter circuit is configured to generate, based on the input voltage and using a first of the two capacitors, a first voltage varying between the positive supply voltage level and a positive first level greater than the positive supply voltage level.

The invention relates to the technical field of direct-current conversion power transmission, in particular to a variable-turn-ratio wide-range direct-current conversion control system and method.When the system operates in a mode corresponding to a first preset signal, primary windings of two transformers are connected in series, secondary windings of the two transformers are connected in parallel, and equivalently, the number of primary turns is doubled, and the number of secondary turns is not changed; the system equivalent turn ratio is reduced to half of a preset physical turn ratio, and the method is suitable for voltage reduction scenes of high input voltage and low output voltage; when the system operates in a mode corresponding to a second preset signal, the two transformers alternately and independently work in a time sequence, and respectively perform energy transmission at a preset physical turn ratio, so that the equivalent turn ratio of the system is equal to the preset turn ratio; when the system operates in a mode corresponding to a third preset signal, the primary windings of the two transformers are connected in parallel and the secondary windings of the two transformers are connected in series, equivalently, the number of turns of the secondary sides is doubled and the number of turns of the primary sides is not changed, so that the equivalent turn ratio of the system is increased to twice of a preset physical turn ratio, and the system is suitable for boosting scenes of low input voltage and high output voltage.

The application discloses a hot spot prevention photovoltaic module based on power optimizer input voltage intelligent control, which does not need to set a bypass diode in a junction box, and avoids the problem that when the junction box fails, the whole module is treated by pouring glue, which causes the difficulty in replacing the junction box, and the great waste caused by the replacement of the whole photovoltaic module; the control unit is provided with a threshold value for the input current of the power optimizer, and different input low voltage protection values of the power optimizer are set according to the comparison between the actual input current of the power optimizer and the threshold value, so that when the low irradiation and the risk of hot spot damage occur, the MPPT tracking range is larger, and the power generation efficiency is improved; when the high irradiation and the risk of hot spot damage occur, the higher input low voltage protection value is set, the reverse bias voltage value between the two ends of the cell piece subjected to the shading is limited, and the extreme hot spot temperature is far away, and the high temperature resistance requirement of the packaging material such as the back plate and the material cost are reduced.

The invention provides a bipolar pulse power supply based on inductive energy storage, and aims to improve the energy storage density of the power supply and realize miniaturization and light weight. The pulse power supply is of a modular structure, each module comprises two switches, a pulse transformer and a main capacitor, a positive pulse winding and a negative pulse winding in a primary winding of the transformer share one magnetic core and control the two switches to be switched on in a staggered mode respectively, bipolar pulse output is achieved, the problem of magnetic core reset does not need to be considered, and the reliability of the pulse power supply is improved. And secondary windings of the module transformers are connected in series to realize voltage superposition under multiple modules. The dielectric barrier discharge multi-array reactor pulse excitation device is realized by adopting an inductance energy storage mode, has the advantages of miniaturization and few components, can realize higher input and output voltage ratio, can be driven by a battery and is low in manufacturing cost, and meanwhile, a modular structure is easy to integrate and expand, and is particularly suitable for a miniaturized and lightweight dielectric barrier discharge multi-array reactor pulse excitation application scene.

The invention relates to a high-input reverse voltage-withstanding four-channel high-speed photoelectric coupler, and belongs to the technical field of semiconductor devices and packaging. The device comprises a ceramic shell, and four high-speed photosensitive integrated circuit chips which are isolated from one another are arranged in the ceramic shell; the number of the ceramic carriers is four, and each ceramic carrier is provided with a light-emitting diode chip and a reverse voltage-resistant protection diode chip; one surface, provided with the light-emitting diode chip and the protection diode chip, of each ceramic carrier faces the interior of the ceramic shell and is fixed above the high-speed photosensitive integrated circuit chip, and the light-emitting diode chip and the high-speed photosensitive integrated circuit chip are oppositely arranged; and the cover plate is arranged on the ceramic shell and is used for packaging the device. According to the invention, the input reverse voltage endurance capability of the device is improved, a protection circuit is not needed, the circuit complexity is reduced, the PCB space is saved, and the circuit reliability is improved.

In an embodiment, an optical power converter includes a container with a light input port and an electrical output terminal. A fluid can be inside the container. A converter device contacts the fluid inside the container. The converter device includes a photovoltaic element that converts light into electrical power. The light travels through the fluid before reaching the converter device. In some examples, the converter device may be a multijunction photovoltaic semiconductor device. The fluid may be an insulating oil or a cryogenic liquid in some examples. In general, the fluid promotes heat transfer away from the converter device and may permit the optical power converter to function at a higher input power and / or with greater efficiency. The fluid may make direct contact with the photovoltaic element in some examples.

A TLVR inductor for GPU board circuitry, relating to the field of inductor technology, employs a technical solution comprising a magnetic core and windings. The magnetic core is a symmetrical, H-shaped core about its central axis, and includes two windows positioned on either side of the central axis. The core is made of metal magnetic powder, and its outer surface is covered with an insulating layer. Two pairs of windings are wound around the core, each passing through one of the two windows, and are symmetrical about the central axis. Each pair of windings includes a primary winding and a secondary winding, both of which are covered with an insulating layer. This invention uses the H-shaped core and two pairs of windings to form two symmetrically arranged TLVR inductors that are mutually coupled. The insulating layer covering the core and winding surfaces allows it to withstand higher input voltages and improve power. Using a metal magnetic powder core as the core material results in low losses at high power. The entire inductor maintains its size while effectively increasing power.

The invention discloses a current harmonic signal injection-based rotating speed fluctuation suppression method and system for an air conditioner compressor without an electrolytic capacitor, and belongs to the field of sensorless control of a permanent magnet synchronous motor. Designing a double-PI regulator to generate a q-axis harmonic current by taking suppression of compressor rotating speed fluctuation as a control target, performing harmonic injection on a q-axis reference value, and performing harmonic injection on the q-axis current reference value again by taking inverter power equal to ideal network side power as a target to obtain a q-axis current reference value; and performing PI control on the difference between the dq-axis current reference value and the dq-axis feedback current to obtain a dq-axis reference voltage, converting the dq-axis reference voltage into an axis voltage reference value, and generating a PWM signal for controlling each switching tube in the inverter. Rotating speed fluctuation of the compressor caused by fluctuating load can be effectively reduced, and meanwhile, a grid-side high input power factor is realized.

The application discloses an operational amplifier circuit and a switching power supply. A current generating circuit generates a bias current signal in a certain proportional relationship with an input voltage or an output voltage of the switching power supply. The bias current signal is controlled to decrease with the increase of the input voltage or the output voltage. The transconductance of the operational amplifier circuit can be adjusted. The switching power supply can have high transconductance of the operational amplifier at low output voltage, and low transconductance of the operational amplifier at high input voltage or high output voltage. The bandwidth of the system at high input voltage or high output voltage is reduced. The stability of the system under different conditions is ensured.

The present invention provides a double-ended output circuit and a signal processing circuit based on a single-ended signal source, in which the signal processing circuit based on the single-ended signal source is configured to amplify an original signal in a single-ended signal form output by the single-ended signal source with an instrumentation amplifier (In-Amp), so as to utilize the high input impedance of the instrumentation amplifier and improve the signal processing efficiency. Complete and high-precision amplification processing is carried out on an original signal in a single-ended signal form output by the single-ended signal source by virtue of the native advantages of high common-mode rejection ratio, high gain adjustment precision, low temperature drift, good linearity and low noise; therefore, weak signals in original signals output by the single-ended signal source can be effectively captured, and the reliability of a corresponding sensing device adopting the signal processing circuit based on the single-ended signal source is guaranteed correspondingly when the single-ended signal source is a corresponding sensing device.

The application discloses a linear voltage stabilizing circuit based on NMOS regulating tube, comprising a bias voltage generating circuit, a voltage division feedback circuit, an oscillator circuit, a charge pump circuit and a pre-voltage stabilizing circuit, wherein the bias voltage is generated through the bias voltage generating circuit; the output voltage is divided to obtain a feedback voltage through the voltage division feedback circuit; the feedback voltage is amplified and then input to the oscillator circuit to generate an oscillation signal; the generated oscillation signal is input to the charge pump circuit; the gate voltage of the NMOS regulating tube is adjusted through the charge pump circuit, so as to obtain the output voltage; the pre-voltage stabilizing circuit widens the input voltage range, so that the linear voltage stabilizing circuit can work in a high input voltage environment; the linear voltage stabilizing circuit based on the NMOS regulating tube has the characteristics of wide input range and low voltage difference, fast transient response speed, and is fully compatible with the thin gate oxide process.

The application belongs to the technical field of analog integrated circuits, and particularly relates to a capacitive coupling chopping instrument amplifier with enhanced input impedance. The self-calibration gate voltage self-boosting charging circuit and the self-zeroing auxiliary operational amplifier are designed in a function complementary and time sequence cooperative mode, and a principle breakthrough is realized through the function complementary and time sequence cooperation. The self-calibration gate voltage self-boosting charging circuit completes high-speed dynamic voltage building at the chopping switching moment, and solves the problem of insufficient building speed of the traditional auxiliary operational amplifier. The self-zeroing auxiliary operational amplifier completes static precision calibration and noise suppression, and eliminates the establishment error of the gate voltage self-boosting and the noise of the auxiliary circuit. The two cooperate to simultaneously realize rapid, high-precision and low-noise establishment of the input capacitor under low power consumption, so that the system obtains a G omega order super-high input impedance, and the high input impedance, low noise and low power consumption are cooperatively optimized, which breaks through the inherent design bottleneck in the industry.