32results about "Pulse generation by active elements" patented technology

An apparatus and method are provided to correct for time-walk errors during photon detections (e.g., detecting gamma rays). A time-walk correction is determined using measurements of energy (or charge) that apply different time windows, enabling corrections accounting for variations in the ratio between fast and slow components in the detected pulse. For example, one time window can be used to integrate the leading end of the pulse, thereby predominantly measuring the fast component, while a second window is used to integrate a trailing end of the pulse to predominantly measure the slow component. Alternatively or additionally, low-pass and high-pass filters may select the slow and fast components, respectively. The time-walk correction is a function of multiple measurements representing different components (e.g., fast and slow) of the pulse shape.

The invention belongs to the technical field of pulse power, and relates to a solid-state repetition-frequency pulse generator driven by multiple paths of synchronous optical fibers and a control method, the solid-state repetition-frequency pulse generator comprises a drive control circuit, the drive control circuit is connected with a Marx generator, and an AC-DC converter and a plurality of groups of IGBT switching circuits connected in series are arranged in the Marx generator; and the AC-DC converter is electrically connected with the group of IGBT switching circuits. In the topological structure, a plurality of IGBTs connected in series only need a gate driving voltage signal to drive the lowermost IGBT switching circuit, and other IGBT switching circuits are connected in series with one another, so that the IGBT switching circuits are sequentially conducted in an extremely short time, and synchronous driving is realized. Based on the circuit structure, a plurality of IGBT devices are modularly designed, and each module only needs one driving signal, so that the number of driving circuits is reduced, and the circuit structure is more compact.

According to the LC-Marx topology-based asynchronous time sequence multi-frequency-multiplication superposed high-voltage pulse generation device provided by the invention, the positive electrode of a diode D3n-2 is connected to the output end of a main control switch Smain, the negative electrode of the diode D3n-2 is connected to one end of an inductor Ln, the other end of the inductor Ln is connected to the drain electrode of an NMOS tube Q1, the source electrode of the NMOS tube Q1 is connected to one end of a capacitor C2n-1, and the other end of the capacitor C2n-1 is connected to the output end of the main control switch Smain. The other end of the capacitor C2n-1 is connected to one end of the capacitor C2n, the other end of the capacitor C2n is connected with the positive electrode of the diode D3N, the negative electrode of the diode D3n is connected to the positive electrode of the diode D3n-1, and the negative electrode of the diode D3n-1 is connected to a common connection point between the capacitor C2N-1 and the source electrode of the NMOS tube Qn. A common connection point between the capacitor C2n-1 and the capacitor C2n and a negative electrode of the diode D3n are connected with a common connection point between the inductor Ln and a negative electrode of the diode D3n-2, a positive electrode of the diode D3n serves as a positive electrode cascade point of the pulse generation unit, and a negative electrode of the diode D3n-1 serves as a negative electrode cascade point of the pulse generation unit. And the grid electrode of the NMOS tube Qn is connected to the output end of the time sequence control unit.

Some embodiments include a nanosecond pulse generator circuit. In some embodiments, the nanosecond pulse generator circuit may include: a high-voltage power supply; a nanosecond pulse generator electrically coupled to the high-voltage power supply and switching a voltage from the high-voltage power supply at a high frequency; a transformer having a primary side and a secondary side, the nanosecond pulse generator electrically coupled to the primary side of the transformer; and an energy recovery circuit electrically coupled to the secondary side of the transformer. In some embodiments, the energy recovery circuit includes: an inductor electrically coupled to the high-voltage power supply; a crowbar diode arranged in parallel with the secondary side of the transformer; and a second diode disposed in series with the inductor and arranged to conduct current from a load to the high-voltage power supply.

The present invention provides a FPGA-based multi-mode amplitude modulation intermediate frequency current pulse signal generator, relating to the field of pulse technology. The device comprises: a power supply module, an MCU control module, an FPGA signal generation module, and a low-frequency current modulation signal generation module, all connected in sequence; a human-machine interface module connected to the power supply module and the MCU control module; an intermediate frequency bipolar pulse generation module and an electrode unit, wherein the power supply module, the intermediate frequency bipolar pulse generation module, and the electrode unit are connected in sequence, the electrode unit serving as the output end of the intermediate frequency current pulse signal generator being connected to acupuncture points on the human body; and the power supply module is further connected to the FPGA signal generation module and the low-frequency current modulation signal generation module, respectively. The technical solution of the present invention overcomes the problem of unstable and controllable intermediate frequency current pulse signals in the prior art.

A bipolar pulse source based on a novel magnetic isolation drive includes a half-bridge drive circuit module, a magnetic isolation drive circuit module, a bipolar Marx pulse source module and a load; the bipolar high-voltage pulse source based on the novel magnetic isolation drive is provided.The drive circuit topology is simple, the magnetic core stack and the anti-parallel mode of the secondary winding are utilized, only two control signals are needed to realize the separate control of four switches in the double Marx topology.The developed pulse source prototype has an output voltage of 0-20kV, a pulse width of 3-10us, a maximum repetition frequency of 200Hz, and a flexible interval between positive and negative polarity pulses.The pulse source adopts modular design, and higher output voltage can be realized by stacking the modules.

The application provides a flip-flop for determining an initial state, comprising a transmission circuit, a first initial state circuit and a second initial state circuit; the transmission circuit is connected with the first initial state circuit and the second initial state circuit respectively; the transmission circuit comprises a first tri-state inverter, a second tri-state inverter and a first inverter connected in sequence; the first initial state circuit comprises a first gate circuit and a second inverter; the first initial state circuit is used for accelerating the flip-flop speed to lock the output of the first tri-state inverter; the second initial state circuit comprises a second gate circuit and a third inverter; the second initial state circuit is used for accelerating the flip-flop speed to lock the output of the second tri-state inverter. The application removes the reset circuit, reduces the number of gate circuits, improves the anti-interference ability of the flip-flop and improves the area utilization rate of the flip-flop.

A differential signal input buffer (200) is disclosed. The differential signal input buffer (200) may receive a differential signal that includes a first signal and a second signal and may be divided into a first section (260) and a second section (261). The first section (260) may buffer and / or amplify the first signal based on a first level-shifted second signal. The second section (261) may buffer and / or amplify the second signal based on a first level-shifted first signal. In some implementations, the first section (260) may buffer and / or amplify the first signal based on a second level-shifted second signal. Further, in some implementations, the second section (261) may buffer and / or amplify the second signal based on a second level-shifted first signal.

The invention aims to provide an asynchronous time sequence multiplexed output time domain superposition high-voltage pulse generator based on LC-Marx topology. The asynchronous time sequence multiplexed output time domain superposition high-voltage pulse generator comprises a main control switch Smain and at least two paths of pulse generation branches with the same circuit structure, the pulse generation branch comprises n pulse generation units which are cascaded in sequence; the input end of the main control switch Smain is connected to the direct-current power supply Uin, and the output end of the main control switch Smain is connected to the input end of the pulse generation unit; after the pulse generation units of each pulse generation branch are cascaded, the cathode cascade point of the first pulse generation unit is grounded through an inductor Ls, and the anode cascade point of the nth pulse generation unit is connected with the input end of a load Rload; the pulse generator can reduce the requirement for a direct-current power supply, has wide input voltage adaptability, can ensure that the pulse generator has approximate square wave output, has wide application scenarios, and is stable and reliable in work.

The invention discloses a pulse energy storage high-voltage power supply in Z-type connection, and relates to the technical field of power electronics, and the high-voltage power supply comprises a supporting structure and a power supply module. The support structure comprises a power ground metal plate, a plurality of post insulators and an epoxy support bottom plate, one end of each post insulator is connected with the power ground metal plate, and the other end of each post insulator is connected with the epoxy support bottom plate; a plurality of module cavities are formed above the epoxy bracket bottom plate through the epoxy bracket top plate, the epoxy bracket partition plate, the spacing vertical plate and the epoxy bracket vertical plate; the number of the power supply modules is multiple, all the power supply modules are located in the multiple module cavities respectively, and all the power supply modules are sequentially connected in series in a Z-shaped connection mode. And through a Z-shaped connection method of the power supply module, the supporting height of the epoxy bracket is reduced, and the occupied space of the energy storage type high-voltage power supply is reduced.

A defibrillator of the present disclosure includes a H-bridge type biphasic pulse generation circuit connected to the rear stage side of a high-voltage capacitor. The biphasic pulse generation circuit includes a first switch, a second switch connected in parallel to the first switch, a third switch connected in series and to the rear stage side of the first switch, and a fourth switch connected in series and to the rear stage side of the second switch. The biphasic pulse generation circuit outputs a biphasic pulse from a first output line connected to a connection intermediate point between the first and third switches and from a second output line connected to a connection intermediate point between the second and fourth switches. In at least one of the first switch to the fourth switch, a plurality of thyristors are connected in series, and a resistor is connected in parallel to each thyristor.

The invention discloses a frequency-adjustable on-chip clock generation circuit, and belongs to the technical field of integrated circuits. The clock generation circuit comprises a reference current generation module, a frequency auxiliary calibration module and a clock generation module. The reference current generation module is connected with the frequency auxiliary calibration module and the clock generation module. The reference current generation module generates reference current with low temperature drift, the frequency auxiliary calibration module is used for assisting off-chip equipment to carry out frequency calibration during middle measurement, and in the clock generation circuit, a clock signal is generated by utilizing charging and discharging of a capacitor. The on-chip clock generation circuit is simple in structure, small in temperature excursion, high in integration level, adjustable in frequency, low in power consumption and low in cost.

The invention discloses a high-speed data serialization circuit for high-speed and high-energy-efficiency wired interface application. The high-speed data serialization circuit comprises a plurality of edge enhanced unit interval pulse generation circuits and an all-in-one multiplexer circuit, each edge enhanced unit interval pulse generation circuit is used for generating a pulse signal with a unit interval width based on the states of an input data signal and a clock signal and a preset pre-charging and rapid discharging strategy; and each input end of the all-in-one multiplexer circuit is correspondingly connected with the output end of one edge enhanced unit interval pulse generation circuit, and is used for serializing all pulse signals through an active peaking technology and outputting the pulse signals to an output node. The high-speed data serialization circuit provided by the invention can expand the bandwidth of the output node so as to adapt to higher frequency requirements.

The utility model provides a novel digital composite signal generator, specifically related to data composite signal technical field, including single-chip microcomputer and digital synthesis circuit, single-chip microcomputer inside integrated DAC, and DAC generates fundamental wave sinusoidal signal, and digital synthesis circuit includes operational amplifier module and low pass filter module, and the fundamental wave sinusoidal signal of DAC generation, through operational amplifier module promotes fundamental wave amplitude, and low pass filter restrains high -frequency noise, ensures the output smooth pure sinusoidal wave. Buffer amplifier enhances signal drive ability and adapts 100 omega load, and adjustable gain module realizes output amplitude accurate control. The on -chip VDD monitor real -time monitoring power supply anomaly, watchdog timer prevents program failure, and JTAG debugging circuit supports non -invasive full -speed in system debugging. The scheme fuses signal processing, voltage monitoring and fault protection function, realizes the novel digital composite signal generator of frequency and amplitude programmable control, guarantees output stable and reliable in industrial environment and long -term unattended operation.

The invention provides a nerve stimulation current generating circuit and a nerve stimulator, and relates to the technical field of medical equipment and nerve electrophysiology, the nerve stimulation current generating circuit only generates two-gear stimulation current, the stimulation current is small, the stimulation mode is simple, and the nerve stimulation current generating circuit is more specially used for cerebral cortex stimulation. The two-gear bipolar constant-current stimulation unit converts the polarity of two-gear stimulation current to generate bipolar nerve stimulation current, and during cerebral cortex stimulation, polarity conversion can alleviate the pulse intensity of two adjacent stimulation currents, reduce side effects on a human body and reduce corrosion to electrodes of a circuit. The nerve stimulator provided by the invention does not need high-value devices such as a single chip microcomputer and a digital analog converter, can be realized by a pure analog technology, reduces the complexity of equipment, is low in application cost and disposable, and reduces the risk of surgical infection.

The invention discloses a pulse generation method for pulse ablation, which relates to the technical field of medical equipment, and comprises the following steps: when a unipolar pulse is generated, closing MOS (Metal Oxide Semiconductor) tubes Q1, Q3 and Q4, conducting an MOS tube Q2, and pre-charging a bootstrap capacitor C1 through a driving chip P1; after pre-charging is completed, triggering signals are input to corresponding pins of the driving chips P1 and P2, and unipolar pulses are generated at the two ends of the load RL; when a bipolar pulse is generated, the MOS tubes Q1 and Q3 are closed, the MOS tubes Q2 and Q4 are conducted, and the bootstrap capacitors C1 and C2 are pre-charged through the driving chips P1 and P2 respectively; after pre-charging is completed, trigger signals are input to corresponding pins of the driving chips P1 and P2, and positive polarity pulses are generated at the two ends of the load RL. According to the invention, a bootstrap gate drive circuit and a pre-charging management strategy are combined, and miniaturized, low-power-consumption and high-precision unipolar / bipolar pulse output is realized.

An integrated circuit (IC) device includes a first die including a first transmitting circuit, a first receiving circuit, and a first circuit. The first transmitting circuit transmits an output clock signal corresponding to a first clock signal. The first receiving circuit receives an input clock signal and an input signal, and outputs, based on the input clock signal, a first signal corresponding to the input signal. The first circuit outputs, based on the first clock signal, a second signal corresponding to the first signal. The first circuit, in response to a first value of a first selection signal, outputs the second signal in response to a first edge of the first clock signal. The first circuit, in response to a second value different from the first value of the first selection signal, outputs the second signal in response to a second edge of the first clock signal.

The utility model relates to an edge-triggered monopulse circuit, system and device. The circuit comprises a first resistor, a second resistor, a third resistor, a capacitor, a diode, a first MOS tube and a second MOS tube. One end of the first resistor is connected to a control signal input end, the other end of the first resistor is connected with a grid electrode of the first MOS tube, a drain electrode of the first MOS tube is connected with one end of the second resistor and one end of the third resistor, and the other end of the second resistor is connected to a first continuous power supply end; the other end of the third resistor is connected with one end of a capacitor, the other end of the capacitor is connected with the positive electrode of a diode, the negative electrode of the diode is connected with the grid electrode of a second MOS tube, and the drain electrode of the second MOS tube is connected to the low-pulse output end; source electrodes of the first MOS tube and the second MOS tube are grounded; the circuit is simple in design, low in development and manufacturing cost, capable of achieving effective signal control while meeting the function of generating low pulses, and beneficial to application and popularization.

The invention discloses a composite pulse magnetron sputtering power supply output pulse forming circuit and a control method, and relates to the technical field of high-power pulse magnetron sputtering, the composite pulse magnetron sputtering power supply output pulse forming circuit adopts a half-bridge parallel connection and half-bridge asymmetric cascade connection mode and a multi-section peak current mode combining in-phase and phase dislocation frequency doubling chopping, and the high-power pulse magnetron sputtering power supply output pulse forming circuit is formed. The negative pulse current value and the waveform shape of the negative pulse current are accurately and repeatedly controlled. In addition, after the negative pulse generates the electric arc, asymmetric positive bias voltage is reversely applied to quickly attenuate the residual energy of the electric arc, and the influence of the electric arc on the coating process quality is reduced.

A semiconductor device includes an input port, a pulse generation circuit, and a serial-parallel conversion circuit. The input port is connected to an input port of the pulse generation circuit and a data signal input port of the serial-parallel conversion circuit. A signal received at the input port is a start bit and a data signal. The pulse generation circuit includes a delay circuit. A clock signal output port of the pulse generation circuit is connected to a clock signal input port of the serial-parallel conversion circuit.

An integrated circuit (IC) device includes first and second dies. The first die includes a first transmitting circuit, a first receiving circuit, and a first circuit. The first transmitting circuit transmits an output clock signal corresponding to a first clock signal. The first receiving circuit receives an input clock signal and an input signal, and outputs, based on the input clock signal, a first signal corresponding to the input signal. The first circuit outputs, based on the first clock signal, a second signal corresponding to the first signal. The second die includes a second receiving circuit coupled to the first transmitting circuit to receive the output clock signal, and a second transmitting circuit coupled to the first receiving circuit and transmitting to the first receiving circuit, based on the output clock signal, the input signal, and the input clock signal corresponding to the output clock signal.

This invention discloses an ultra-high precision second pulse and 10MHz signal measurement circuit and method, relating to time unification technology and signal communication fields. The circuit includes a 10ps-level four-channel first and second TDC chip, a 10MHz high-stability reference clock module, a daisy-chain arrangement of the measurement signal input module, and a power supply ultra-clean module. The first TDC chip, second TDC chip, DC-DC circuit, first-stage clean circuit, and second-stage clean and filter circuit all utilize potted components. The test circuit achieves 10ps peak-to-peak measurement accuracy by selecting a 10ps-level measurement chip, employing power supply ultra-clean technology, high-stability reference clock technology, a daisy-chain arrangement of the measurement and reference clocks, and a device potting and temperature control method, thus improving upon the original device specifications. The method further improves measurement accuracy through measurement result fitting technology, optimizing the original 10ps peak-to-peak measurement accuracy to 6ps peak-to-peak measurement accuracy.

A distributed multi-pulse synchronous triggering device comprises an external triggering control signal generator and a single-machine triggering control signal generator. The external trigger control signal generator sends out a trigger instruction in a wireless signal mode or a multi-path wired signal mode, and the single-machine trigger control signal generator generates a specific time sequence control signal after receiving the trigger instruction; the single-machine trigger control signal generator measures and compensates the time delay from the time when the single-machine trigger control signal generator receives the trigger indication transmitted in the wireless signal mode to the time when the single-machine trigger control signal generator generates the trigger control signal; a plurality of pulse power sources can generate high-voltage pulses at the same time; or the external trigger control signal generator adjusts the time interval Tn between the generated multiple paths of indication signals in the wired signal mode, so that the multiple pulse power sources generate high-voltage pulses at the same time. According to the distributed synchronous triggering device, synchronous triggering of a plurality of distributed pulse power sources can be achieved, and therefore the purpose of excellent expansibility in pulse power synthesis is achieved.

The invention discloses a picosecond high-voltage pulse generator with dynamic performance, and belongs to the field of high-voltage pulses. An STM32 main control chip and a magnetic reed relay are adopted to design an eight-channel high-voltage control circuit, and the eight-channel high-voltage control circuit is fused with a picosecond high-voltage pulse generator, so that V-shaped high-voltage pulse output with adjustable amplitude, pulse width and rising edge slope is realized. According to the generator, through a parallel control strategy, the pulse amplitude can be accurately adjusted within the range of-1.212 kV to-1.887 kV, the full width at half maximum is stabilized at 245-327 ps, and the slope of the rising edge is 3.61-10.01 V / ps. According to the multi-channel synchronous output pulse generator, the high-voltage isolation characteristic of the magnetic reed relay is utilized, accurate time sequence control of the STM32 is combined, inter-channel crosstalk and time sequence jitter are effectively reduced, and the problem of performance degradation of a traditional pulse generator during multi-channel synchronous output is solved. The device is suitable for high-precision high-voltage pulse application, and has the advantages of dynamic adjustability, high stability and multi-channel synchronous output.

An integrated circuit (IC) device includes a first and a second die. The first die includes a first transmit circuit, a first receive circuit, and a first circuit. The first transmit circuit transmits an output clock signal corresponding to a first clock signal. The first receive circuit receives an input clock signal and an input signal and, based on the input clock signal, outputs a first signal corresponding to the input signal. The first circuit outputs a second signal corresponding to the first signal based on the first clock signal.The second die includes a second receive circuit coupled to the first transmit circuit to receive the output clock signal, and a second transmit circuit coupled to the first receive circuit and transmitting to the first receive circuit based on the output clock signal, the input signal, and the input clock signal corresponding to the output clock signal.

The invention provides a clock signal generating circuit and a clock signal generating method thereof. When the analog clock signal generator circuit does not provide the output clock signal, the control circuit controls the multiplexer circuit to select and output the oscillation signal provided by the oscillator circuit to the analog clock signal generator circuit, and controls the clock path circuit to stop transmitting the input clock signal.

The invention discloses an improved bipolar pulse generating device for transformer fault diagnosis. The improved bipolar pulse generating device comprises multi-path configurable pulse signal output realized by an FPGA, a magnetic isolation driving circuit, stray inductance measured by a double-pulse test method and an adjustable RC network. According to the device, the influence of stray inductance is suppressed through the RC network, the output waveform is optimized, and high-precision sequential control and high-sensitivity fault detection are realized. Compared with the prior art, such as a pulse generator based on a Marx circuit or a hydrogen thyratron, waveform distortion is effectively reduced, parameter adaptability is improved, and the pulse generator is suitable for different transformer loads. By means of the design, the sensitivity and accuracy of transformer winding fault detection are improved, the adaptability of the device to transformers of different models is enhanced, and an efficient and reliable solution is provided for power equipment state monitoring.

The utility model discloses a bipolar high-voltage pulse generator capable of preventing switch direct connection, which relates to the field of pulses and comprises a cascaded positive and negative polarity Marx main circuit used for converting input direct current into bipolar high-voltage pulses and outputting the bipolar high-voltage pulses to an application load; an anti-straight-through diode is introduced to cut off a short-circuit current generated during a fault; the beneficial effects of the utility model are that the introduced anti-straight-through diode can completely cut off the short-circuit current generated when the switch tubes are switched on at the same time, thereby preventing the occurrence of short-circuit faults, and greatly improving the stability and reliability of system operation; due to the adoption of a module structure, the formed devices are the same, under the condition that the circuit structure is not changed completely, the circuit can output high-voltage pulse voltages with single positive polarity and single negative polarity by optimizing a time sequence, and functions are increased; only two groups of control signals are needed, and the four switches in the circuit can be respectively controlled.

The invention discloses an off-chip resistance-capacitance detection circuit, and relates to the technical field of resistance-capacitance detection, and the circuit comprises an oscillation circuit module, a resistance recognition module and a capacitance recognition module. The resistance identification module is connected with an external device to be tested, the capacitance identification module and the oscillating circuit module, and the capacitance identification module is connected with the oscillating circuit module; the resistance identification module is used for judging the detected to-be-detected node voltage of the external to-be-detected device and outputting a resistance indication signal; the oscillating circuit module is used for generating an oscillating signal and outputting the oscillating signal serving as a clock signal to the capacitance identification module; and the capacitance identification module is used for carrying out filtering and frequency selection on the oscillation frequency of the oscillation signal to obtain a frequency selection result, and determining a capacitance indication signal according to the frequency selection result so as to judge whether an external to-be-tested device has a resistor or a capacitor or not under the condition that an internal integrating capacitor is not needed.

The invention discloses a high-voltage collaborative pulse generation system which comprises a user interface, a control unit, a driving circuit, a charging module and a collaborative pulse generation device. The cooperative pulse generation device is a Marx generator; the charging module charges a high-voltage pulse main capacitor bank of the Marx generator according to the obtained high-voltage control signal so as to obtain a high-voltage processing pulse; the Buck circuit reduces the voltage of the direct current charging power supply output of the charging module according to the obtained duty ratio and outputs the voltage to a low-voltage pulse main capacitor bank of the Marx generator, the capacitor bank is charged, and a low-voltage processing pulse is obtained; the Marx generator generates high and low voltage pulse signals with different parameters according to the driving signal and the charging control signal; the electrode transmits high-low voltage cooperative pulses generated by the Marx generator circuit to a load to be processed. Only one direct-current charging power supply is needed, part of circuit elements are shared, the utilization efficiency of all the elements is greatly improved, and the manufacturing cost is reduced.