1617 results about "Charge pump" patented technology

The invention belongs to the field of driving circuits of gallium nitride (GaN) power devices in motor driving or power electronic conversion, and discloses a design method of a three-level active driving circuit for restraining bridge arm crosstalk of a GaN device, and the method comprises the steps that a circuit is connected in a bridge type topological structure, and the bridge type topological structure comprises an upper bridge arm and a lower bridge arm which are the same in structure; the upper bridge arm and the lower bridge arm are both divided into two parts, namely a traditional driving circuit and an auxiliary circuit, and the auxiliary circuit is divided into a negative voltage self-recovery circuit and a crosstalk suppression circuit. According to the invention, a negative voltage self-recovery circuit and a crosstalk suppression circuit are formed by using the output and reverse conduction characteristics of the charge pump and the auxiliary GaN device. The advantages of the two methods are combined, the defects of a traditional method are effectively overcome, the turn-off speed is increased, the turn-off loss is reduced, and the positive and negative crosstalk is reduced while the turn-on speed is hardly influenced and the reverse turn-on loss is not additionally increased. The overall design is flexible, efficient and reliable.

A charge pump, a phase-locked loop, a radar sensor, and an electronic device. The charge pump is applicable to the phase-locked loop. The charge pump comprises a discharging circuit and a charging circuit, both of which are connected to an output end of the charge pump. The discharging circuit reduces a current of the output terminal under control of a first control signal, the charging circuit increases it under control of a second control signal, the first control signal and the second control signal being corresponding to error signals between the two clock signals. The charge pump further comprises a voltage control circuit connected to a first node in the discharging circuit and / or a second node in the charging circuit to maintain the locked state of the phase-locked loop by controlling voltages of corresponding nodes, the first node and the second node being both connected to the output end.

In certain aspects, a voltage regulator includes a pass transistor coupled between an input of the voltage regulator and an output of the voltage regulator, and an amplifier having a first input coupled to a reference voltage, a second input coupled to the output of the voltage regulator via a feedback path, and an output. The voltage regulator also includes a voltage booster coupled between the output of the amplifier and a gate of the pass transistor. In certain aspects, the voltage booster includes a first capacitor and a second capacitor for double charge pumping. In certain aspects, a control circuit of the voltage booster is coupled to a voltage source that is independent of an output voltage of the amplifier.

A charge pump circuit includes first and second capacitors, first, second, third and fourth switches, and a transistor. The first switch is coupled between a top plate of the first capacitor and a first voltage input terminal. The second switch is coupled between a bottom plate of the first capacitor and a reference voltage terminal. The third switch is coupled between the top plate of the first capacitor and a top plate of the second capacitor. The transistor and the fourth switch are coupled in series between the bottom plate of the first capacitor and a second voltage input terminal.

Disclosed in the present invention is a high-dynamic capacitive digital microphone system based on electrostatic force feedback. The system comprises an MEMS microphone and an interface circuit chip thereof, wherein the interface circuit chip comprises a charge pump, an analog front end, an analog-to-digital conversion circuit, an amplitude detection module, an amplitude adjustment control module and a pulse density modulation module. In the present invention, the characteristic of the sensitivity being able to be adjusted by means of changing a bias voltage by a capacitive sensor is used, and a charge pump with an adjustable output voltage is used to provide electrostatic force feedback, thereby further expanding the adjustable range of a front-end gain, and also reducing requirements for the noise performance of a readout circuit. Therefore, the system in the present application has the characteristics of high dynamic range and high-precision quantization.

Disclosed is a voltage regulator including a power supply terminal and an output terminal. The voltage regulator includes an NMOS transistor including a drain electrode connected to the power supply terminal, a gate electrode, and a source electrode connected to the output terminal; a first regulating circuit including a voltage divider circuit connected between the output terminal and ground, and configured to generate a feedback voltage based on the output voltage of the output terminal, and an error amplifier including a first input terminal, a second input terminal, and an output terminal connected to the gate electrode; and a second regulating circuit including a charge pump having an enable control terminal and an output terminal connected to the gate electrode, wherein the charge pump is configured to be selectively turned on based on the enable control signal to regulate the output voltage of the voltage regulator.

The invention discloses a high-speed level conversion circuit, and belongs to the technical field of integrated circuit design, the circuit mainly comprises an input signal processing module, a voltage boosting module, a differential signal generation module, a signal amplification module and an output module, the input signal processing module converts a low-voltage input signal into a complementary logic signal pair; the voltage boosting module raises the voltage amplitude of the complementary logic signal by using a charge pump principle; the lifted signal drives a thick gate transistor in the differential signal generation module to generate a differential signal; the signal amplification module adopts a cross coupling structure to quickly amplify the differential signal; and finally, the output module outputs a high-voltage domain signal in an inverted manner. By introducing voltage bootstrap before gate driving, the overdrive voltage of a core switch tube is remarkably increased, so that the problem of low conversion speed of a traditional level conversion circuit is effectively solved on the premise of not increasing the device size and static power consumption, and high-speed and high-efficiency level conversion is realized.

A high-linearity grid voltage bootstrap circuit relates to the technical field of analog-to-digital conversion and comprises a first charge pump boosting unit, a second charge pump boosting unit and a grid voltage bootstrap unit, working states of a sampling switch are divided into a sampling state and a holding state, an input voltage VIN is boosted to a VG through the grid voltage bootstrap unit in a sampling stage, and the sampling switch is switched on; and the holding stage sampling switch is cut off, and charges are injected to the upper polar plates of the capacitors C3 and C4 of the gate voltage bootstrap unit through the first charge pump boosting unit and the second charge pump boosting unit respectively. According to the invention, the problem that the actual gate-source voltage is reduced due to the grid parasitic capacitance of the sampling switch is solved, and the layout area occupation is greatly reduced while the bootstrap voltage is improved; the proportion of the capacitor C3 and the capacitor C4 can be flexibly set to obtain the required bootstrap voltage; and the problem that the on-resistance of the sampling switch is increased due to the reduction of the gate-source voltage can be solved, and the linearity of the sampling switch is improved.

A disclosed charge pump includes first and second stages and, optionally, additional stage(s). The first stage receives a voltage input (Vin) at a first voltage (V1), CLK1 (GND, V1), and CLK1B (V1, GND), and outputs a first stage voltage output (Vout1) at a second voltage (V2) double V1. A second stage receives Vout1, CLK2 (V1, V2), and CLK2B (V2, V1, and outputs a second stage voltage output (Vout2) at a third voltage (V3) essentially triple V1, and so on. A clock driver supplies CLK1-CLK1B to the first stage and to a clock generator. The clock generator includes: a voltage level shifter, which receives CLK1 and CLK1B and outputs multiple level-shifted voltage output pulses; and a driving circuit, which receives specific ones of the output voltage pulses and outputs CLK2 and CLK2B to the second stage and, if needed, additional voltage level-shifted clock signal-inverted clock signal pairs to any additional stages.

The present disclosure provides a multi-stage charge pump, a current limiting circuit, a driver circuit, a charge pump, a chip, and an electronic device. A control circuit controls a first charge pump circuit to boost an input voltage of a multi-stage charge pump, and controls, based on a second-phase clock signal, a second charge pump circuit to be charged using an output voltage of the first charge pump circuit, such that the second charge pump circuit boosts an output voltage of the first charge pump circuit, and hence a high-side switch driver circuit satisfies a drive requirement of a high-side switch. This ensures normal operation of the charge pump is ensured while reducing the cost and circuit area. In this way, the reliability and safety of the charge pump are improved.

The embodiment of the invention provides a novel integrated charge pump driving circuit and a power integrated circuit, and relates to the technical field of driving circuits, the circuit comprises a front signal processing circuit and a main charge pump and driving circuit; the front signal processing circuit receives a driving logic signal input by the system, preprocesses the driving logic signal and outputs a low-voltage control signal, a first high-voltage control signal and a second high-voltage control signal; and the main charge pump and drive circuit is connected with the output end of the front signal processing circuit, receives the low-voltage control signal, the first high-voltage control signal and the second high-voltage control signal, and processes and outputs a gate drive signal. The circuit provided by the invention can continuously output high-quality gate driving signals, hundred percent duty ratio driving is realized, only dynamic power consumption of the charge pump exists in the whole driving scheme, and the efficiency is higher.

A dual path PLL provides excellent output phase stability over PVT variations, without implementing a high accuracy TDC. A digital integral path employs a binary phase detector, comparing the reference and feedback signals, and an integrator to generate an oscillator control input to lock the long-term output phase to the reference signal. An analog proportional path employs a linear (e.g., edge triggered) phase detector and a charge pump and filter to generate an oscillator control input to mitigate phase noise in the output signal. The feedback signal to the proportional path is delayed, which has the effect of increasing the width of phase error pulses, and moving the charge pump operating point away from the zero point where it generates both positive and negative currents, which are difficult to match. A second linear phase detector in the proportional path compensates for the increased phase error pulse width by comparing the delayed and non-delayed feedback signals, and generating pulses in the opposite direction.

The invention provides a dynamic residual amplification circuit based on charge sampling, and relates to the technical field of integrated circuits, the dynamic residual amplification circuit comprises an integrating circuit, a logic circuit, a charge pump and a zero-cross detection circuit, the integrating circuit is connected with the logic circuit and the zero-cross detection circuit, the integrating circuit converts a sampled input differential signal into a constant current, and the constant current is connected with the charge pump. The output node is continuously charged or discharged, so that the input differential signal is converted into a current integral quantity; the zero-cross detection circuit monitors the output voltage of the integrating circuit in real time, and when the output voltage is greater than or equal to the common mode voltage VCM, the moment when the output voltage is equal to the common mode voltage VCM is converted into a digital clock edge; the logic circuit is connected with the charge pump and outputs digital pulses to the charge pump according to the digital clock edge so as to control the reset time sequence of the whole dynamic residual amplification circuit; the charge pump is configured to output a residual voltage modulated by the digital pulse in response to the digital pulse. The application helps to improve the linearity of the residual signal.

The invention relates to a class-C voltage-controlled oscillator with negative-pressure substrate bias and a use method thereof. Aiming at the problem that a traditional C-type voltage-controlled oscillator is difficult to start, the C-type voltage-controlled oscillator provided by the scheme adopts different circuits to simultaneously control the grid voltage and the substrate voltage of the cross-coupled pair transistors, so that the transistors are effectively prevented from entering a linear region, and the C-type voltage-controlled oscillator is quickly started and stably works in a C-type oscillation mode. The circuit structure of the scheme comprises an NMOS (N-channel Metal Oxide Semiconductor) cross coupling circuit, a PMOS (P-channel Metal Oxide Semiconductor) cross coupling circuit, an LC resonant cavity circuit, an amplitude detection circuit, a Schmidt signal processing circuit and a negative voltage charge pump circuit. Wherein the Schmidt signal processing circuit and the negative voltage charge pump circuit rapidly process an initial oscillation signal and provide negative voltage required by the system, and a substrate of the NMOS cross coupling tube is biased. According to the scheme, the design structure is simple, the tuning range is wide, and a new thought is provided for research and design of quick start of the C-type voltage-controlled oscillator.

The invention relates to the field of protection circuits, in particular to a reverse voltage protection circuit which comprises a current modulation module, a reverse voltage detection module, a reverse blocking module and a driving system. The driving system comprises a charge pump boosting module and a power tube N1; after the load switch is enabled, the current modulation module works and provides a first bias voltage VB101 and a second bias voltage VB102 for the reverse voltage detection module, and the charge pump boosting module boosts the grid voltage Vgate of the power tube N1 and drives the power tube N1 to enter a linear region to supply power to an external load; the reverse voltage detection module continuously detects the VOUT of the output voltage and compares the VOUT with the VIN, and if the VOUT of the output voltage is larger than the VIN and exceeds a certain range, the reverse voltage controls the reverse blocking module to work, the grid Vgate voltage of the power tube N1 is clamped, the power tube N1 is cut off, and input and output current is blocked.

The invention provides an automatic frequency locking circuit based on a time-to-voltage converter and a phase-locked loop, and relates to the technical field of phase-locked loops, a first frequency-halving unit and a second frequency-halving unit respectively carry out frequency-halving processing on a reference signal and a frequency division signal of a current comparison period to obtain a first square wave signal and a second square wave signal; the first square wave signal and the second square wave signal are transmitted to the time-to-voltage converter; the time voltage converter comprises a phase generation unit, a first charge pump and a second charge pump, the phase generation unit generates an enable signal according to the first square wave signal and the second square wave signal, and the first charge pump and the second charge pump respond to control of the enable signal and collect single pulse signals from the first square wave signal and the second square wave signal respectively so as to supply power to the input end of the comparator; the comparator compares power supply voltages of the two input ends to achieve frequency comparison of the reference signal and the frequency division signal. And selection in a plurality of phase signals is not needed, and required digital circuit modules are reduced, so that the delay of the reference signal and the frequency division signal in the conversion process is reduced.

The invention provides a power management and power consumption control device and method of a continuous blood glucose detection circuit. Relates to the technical field of continuous blood glucose detection, solves the problems of power consumption control and switching in the prior art, and is characterized in that a power input end of a charge pump is connected with an anode of an external power supply; the control input end of the charge pump is connected with a mode control signal end; the power output end of the charge pump is connected with the first control end of the power switch device; the switching signal control end of the charge pump is connected with the second control end of the power switching device through the delayer; the output end of the power switch device is connected with the working voltage input end, and the working voltage output end is connected with the grounding capacitor; the power output end of the charge pump is connected with the input end of the power-on reset module, the power switch switching signal end of the power-on reset module is connected with the power switch switching signal end of the charge pump, and different working modes can be achieved, so that power consumption control is achieved.

A Solar Panel Assembly comprising a charge pump configured to boost a solar cell voltage to an intermediate voltage, a transformer configured to transform an alternating current voltage to the intermediate voltage, a battery configured to take a charge at the intermediate voltage from the charge pump and the transformer simultaneously, and a transparent housing for the charge pump, the transformer and the battery.

Systems and devices for power multiplexing are described. A device can include a first power input circuit including a first power driver having a first gate that is configured to receive power from a first power input channel and output power to a power output channel. The device includes a second power input circuit including a second power driver having a second gate that is configured to receive power from a second power input channel and output power to the power output channel. The device includes a charge pump connected to the power output channel that generates an output having a voltage greater than a voltage on the power output channel. The device includes a switching circuit connected to the output of the charge pump that is configured to selectively control the first and second power input circuits to output power to the power output channel.

The utility model relates to the technical field of gas cylinder airtightness testing, and particularly provides a gas cylinder airtightness testing device, which comprises a base, a gas cylinder conveying belt is arranged on the base, the gas cylinder conveying belt comprises a first conveying belt and a second conveying belt, a water tank is arranged between the first conveying belt and the second conveying belt, and a gas cylinder taking and placing mechanism is arranged above a gas cylinder conveying mechanism; an inflation and deflation mechanism and a plurality of rotating shafts are arranged in the pool, the inflation and deflation mechanism comprises a lifting mechanism, a fixed table and inflation connectors, the fixed table is arranged on one axial side of the rotating shafts in a liftable mode through the lifting mechanism, a plurality of fixed plates are arranged on the fixed table, and each fixed plate is rotationally connected with one inflation connector; and the inflating joint is respectively connected with the pressure release valve and the inflating pump. According to the utility model, the automation degree of the gas cylinder airtightness test can be improved, the manpower is saved, the gas cylinder can be overturned by the rotating shaft in the water tank, the position of a leakage point can be observed more easily by overturning the gas cylinder, and the efficiency and effect of the gas cylinder airtightness test are improved.

This disclosure provides a charge pump circuit. The charge pump circuit according to this disclosure includes one or more cascaded boost units and output units having the same structure. Each boost unit has a dual-branch structure with top and bottom symmetry and connected to two sets of four-phase clock signals with opposite clock phases. By adjusting the phase relationship of the four-phase clocks, the rise time of the gate voltage of the transfer transistor can be delayed by advancing the falling edge of the driving clock of the secondary capacitor and delaying its rising edge. This ensures that the transfer transistor is in the off state at the moment of high-low phase switching, thereby avoiding the problem of reduced charge transfer efficiency caused by reverse charge flow between the input and output nodes of the boost unit.

The invention belongs to the technical field of power management, and particularly relates to a double-phase DC-DC topological structure with a current multiplier. The invention is characterized in that a current multiplier and a switched capacitor SC buck are embedded on the basis of the traditional multiphase buck, the inductive current and the RMS current of a buck power device are greatly reduced, the current stress is transferred to a charge pump structure of a low-voltage and low-FoM-value device, and the voltage stress is retained in a high-voltage device of the buck. And high conversion efficiency is realized through a strategy that the charge pump and the buck share current and voltage stress respectively. Meanwhile, due to the fact that the switched capacitor has extremely low output impedance, and the circuit is compatible with a loop control strategy of a traditional multi-phase buck, the transient response speed is also remarkably improved. The idea of the invention can be linearly expanded from typical two-phase buck to N-phase buck, so that the topological structure of the invention has universality.

The invention belongs to the technical field of electronic circuits, and provides a negative voltage charge pump circuit, a switching power supply converter and electronic equipment. A reference voltage generation module, a comparison module, a fourth driving module, a fifth power tube, a sixth power tube and a seventh power tube are additionally arranged on an existing charge pump. The reference voltage generation module is used for generating third reference voltage, namely threshold voltage when the negative-voltage charge pump circuit enters the light load, then the comparison module is used for comparing the third reference voltage with error voltage output by the error amplifier, and whether the negative-voltage charge pump circuit enters the light-load working condition or not is judged; when the negative-voltage charge pump circuit enters a light-load working condition, the large-size power tube and the driving module thereof are closed, and only the small-size power tube works, so that other performances of the negative-voltage charge pump circuit are ensured, the working current of the negative-voltage charge pump circuit in the light-load state is greatly reduced, and the working efficiency of the negative-voltage charge pump circuit is improved. Therefore, the conversion efficiency of the charge pump circuit in light load is improved.

The invention discloses a grid voltage bootstrapped switch circuit with compensation and an ADC, and belongs to the technical field of integrated circuits. The circuit comprises a compensation charge pump circuit and a grid voltage bootstrapped switch circuit. A charge pump branch power supply end in the grid voltage bootstrap switch circuit is connected to an output compensation voltage end of the compensation charge pump circuit; when the input clock signal CLK1 is low and the input clock signal CLK2 is high in level, the power supply end of the charge pump branch is switched off, and the capacitor in the charge pump circuit is compensated for charging; when the level of the CLK1 is high and the level of the CLK2 is low, the power supply end of the charge pump branch is switched on, a bootstrap capacitor in the grid voltage bootstrap switch circuit is charged, and the Vboost provides compensation voltage. The compensation charge pump circuit provides higher power supply voltage for the grid voltage bootstrap switch, grid voltage drop of the sampling switch tube caused by parasitic capacitance at the positive end of the bootstrap capacitor can be compensated back, input parasitic capacitance is reduced, on-resistance of the sampling switch tube is reduced, and sampling linearity is improved.

A cascaded switched power converter provides a wide voltage conversion ratio and improved efficiency ins systems such as power supplies and amplifiers. A switched-capacitor charge pump circuit is operated by one or more first clock signals and is coupled in cascade with an inductor-based power supply circuit according to one or more second clock signals. A control circuit that generates clock signals so that the one or more second clock signals have a phase offset with respect to the one or more first clock signals that is set to adjust a conversion ratio of the cascaded combination of the switched-capacitor charge pump circuit and the inductor-based power supply circuit. The inductor of the inductor-based power supply circuit may be an inductive load, such as a speaker, and the phase offset may be modulated according to an audio signal to provide audio amplification.

A multi-phase clock signal generating circuit, configured to generate a plurality of output clock signals with different phases, comprising: a charge pump, configured to generate a control voltage according to a reference clock signal and a target clock signal; a delay circuit, comprising a delay chain with a plurality of delay units, configured to generate a plurality of candidate clock signals and the target clock signal according to the control voltage; and a phase selecting circuit, configured to select at least two of the candidate clock signals as the output signals.

A level shifter or a display device comprising a level shifter includes a scan channel circuit generating a scan start signal for a plurality of subpixels according to a first input signal, a charge pump circuit generating a high-potential emission voltage using circuit power of a host system, and an emission channel circuit controlling an emission start signal according to a second input signal with a change in the circuit power reflected.

A charge pump circuit of a semiconductor memory device, which may include a first pumping stage that includes a first pumping capacitor and a second pumping capacitor, a first transfer stage that transfers a voltage of the first pumping capacitor when a clock signal is at a high level or transfers a voltage of the second pumping capacitor when a inverse clock signal is at the high level, a second pumping stage that includes a third pumping capacitor and a fourth pumping capacitor, and a second transfer stage that transfers a voltage of the third pumping capacitor when the clock signal is at the high level or transfers a voltage of the fourth pumping capacitor when the inverse clock signal is at the high level. The second transfer stage may output multiple times of the input voltage.

The invention provides a capacitor self-checking circuit, a charge pump system and a self-checking method. The capacitor self-checking circuit is characterized in that the output end of a charge pump unit is connected with an upper pole plate of a second capacitor through a current source and a first mode switching switch in sequence; the first resistor and the second mode change-over switch are connected in series between the upper pole plate and the lower pole plate of the first capacitor; the second resistor and the third mode change-over switch are connected in series between the upper pole plate of the first capacitor and the ground; the third resistor and the fourth mode change-over switch are connected in series between the upper pole plate of the second capacitor and the ground; the first comparator is connected with the upper and lower polar plates of the first capacitor and outputs a first detection result; and the second comparator is connected with the upper and lower polar plates of the second capacitor and outputs a second detection result. According to the capacitance self-checking circuit and method of the charge pump, detection items are more comprehensive, the detection time is short, the efficiency is high, the power consumption is low, and the cost is low; after the detection is completed, the system can be started immediately without an additional pre-charging link.

The present invention provides a charge pump circuit and an electronic device, wherein the circuit includes a voltage control module and a charge pump, wherein the voltage control module includes a comparison unit and a voltage control unit. The charge pump circuit is used to compare and process the boost voltage and the reference output voltage to obtain a first comparison signal, and to compare and process the first comparison signal with the floating ground voltage of the first node to obtain a second comparison signal; the first end of the voltage control unit receives the functional voltage, and the second end is coupled to the first node, and the first node is also grounded through a tail current source. The conduction degree of the voltage control unit is controlled by the second comparison signal to control the voltage of the first node, thereby controlling the voltage value of the floating ground voltage. The input end of the charge pump receives the functional voltage, and its ground end is coupled to the first node. The charge pump is used to boost the functional voltage and output the boost voltage. The rail voltage difference of the working voltage of the charge pump of the present invention is small, so that the voltage stress of the charge pump is small and the EMC performance is good.