45results 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.

The present application relates to a pulse generation circuit, a pulse generator, and a medical device. The pulse generation circuit includes: a control circuit, a high-voltage power supply circuit, a working power supply circuit, a pulse switch circuit, a plurality of photoelectric isolation drive circuits and a plurality of magnetic isolation power supply circuits. According to the present application, isolation between various power switches can be realized by means of the above photoelectric isolation drive circuits and magnetic isolation power supply circuits; moreover, the photoelectric isolation drive circuits have higher response speeds, such that the synchronization rate of the respective power switches can be improved by controlling the power switches according to a switch control signal by means of the photoelectric isolation drive circuits.

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 invention provides a bipolar current pulse generator comprising a control signal generation module used for generating a control signal; the driving control circuit module is connected with the control signal generation module and is used for converting the control signal into a current signal; the pulse generation circuit module is connected with the driving control circuit module and is used for generating inductive current according to the current signal; and the direct current power supply is respectively connected with the control signal generation module and the pulse generation circuit module and is used for supplying power to the control signal generation module and the pulse generation circuit module. And the output current does not change along with the change of the load characteristics, and the output current can be adjusted by changing the charging time and the charging voltage and increasing or decreasing the number of circuit stages.

A differential signal input buffer (200) is disclosed. The differential signal input buffer (200) receives a differential signal including 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 the 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. Also, in some implementations, the second section (261) may buffer and / or amplify the second signal based on the second level-shifted first signal.

The invention provides a multi-mode amplitude modulation intermediate-frequency current pulse signal generating device based on an FPGA (Field Programmable Gate Array), which relates to the technical field of pulses and comprises a power supply module, an MCU (Microprogrammed Control Unit) control module, an FPGA signal generating module and a low-frequency current modulation signal generating module which are connected in sequence, the man-machine interface module is connected with the power supply module and the MCU control module; the device further comprises an intermediate-frequency bipolar pulse generation module and an electrode unit, the power module, the intermediate-frequency bipolar pulse generation module and the electrode unit are sequentially connected, and the electrode unit serves as the output end of the intermediate-frequency current pulse signal generation device and is connected with human body acupuncture points. The power supply module is also connected with the FPGA signal generation module and the low-frequency current modulation signal generation module. According to the technical scheme, the problem that the intermediate-frequency current pulse signal is unstable and controllable in the prior art is solved.

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 present invention relates to a power-free neuron circuit that utilizes a p‑n‑p‑n diode for the purpose of small area and low power consumption. According to one embodiment, the neuron circuit generates an electric potential by charging a current input from a synapse through a capacitor. If the generated electric potential is greater than a threshold value, a pulse voltage corresponding to the generated electric potential can be generated and output by a p‑n‑p‑n diode connected to the capacitor.

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.

The invention discloses a pulse generation module based on a high-voltage fast thyristor, a module group and a pulse generation method, and solves the problems that a pulse generation module adopting an IGBT switch is low in single-tube power density, complex in synchronous control, easy to interfere and relatively complex in driving, and the pulse generation module specifically comprises a charging unit, a fast thyristor K, a driving circuit D, a PFN unit and an output unit; the charging unit comprises a charging port INA, a charging isolation diode DC, a charging port INB and a charging current-limiting resistor RC; the charging isolation diode DC and the charging current-limiting resistor RC are connected with the PFN unit through a fast thyristor K, and the fast thyristor K is also connected with a driving circuit D; the PFN unit comprises a PFN0, a PFN1 and a fly-wheel diode DS; the output unit comprises an output port OUTA and an output port OUTB; the output port OUTA is connected with the c end of the PFN1; and the output port OUTB is connected with the d end of the PFN0. Compared with an IGBT (Insulated Gate Bipolar Transistor), the high-voltage fast thyristor has the advantages of high single-tube power density, simplicity in driving, strong anti-interference capability and the like.

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.

The present invention belongs to the technical field of integrated circuits, and specifically relates to a clock generation circuit. The clock generation circuit of the present invention does not require an external reference voltage to be provided as in the traditional structure. The reference voltage is determined inside the comparator, and the reference voltage is independent of temperature, enhancing the temperature stability and accuracy of the output clock frequency; embedding the reference voltage in the comparator structure greatly simplifies the circuit structure and optimizes the area and power consumption; therefore, the clock generation circuit of the present invention has the characteristics of simple structure, low power consumption, high accuracy, strong independence, and high reliability.

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.

An integrated circuit (IC) device includes first and second dies. The first die includes a first transmit circuit, a first receive circuit, and a first circuit. The first transmission circuit transmits an output clock signal corresponding to the first clock signal. The first receiving circuit receives an input clock signal and an input signal, and outputs a first signal corresponding to the input signal based on the input clock 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 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 an input signal and an input clock signal corresponding to the output clock signal to the first receiving circuit based on the output clock signal. The embodiment of the invention also discloses a method for operating the integrated circuit device.

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.

The present application relates to a pulse generation circuit, a pulse generator, and a medical device. The pulse generation circuit (10) includes: a control circuit (100), a high-voltage power supply circuit (210), a working power supply circuit (220), a pulse switch circuit (500), a plurality of photoelectric isolation drive circuits (300) and a plurality of magnetic isolation power supply circuits (400). According to the present application, isolation between various power switches (510) can be realized by means of the above photoelectric isolation drive circuits and magnetic isolation power supply circuits; moreover, the photoelectric isolation drive circuits have higher response speeds, such that the synchronization rate of the respective power switches can be improved by controlling the power switches according to a switch control signal by means of the photoelectric isolation drive circuits.

The invention provides a controllable pulse waveform generator. The controllable pulse waveform generator comprises a delay link unit, a waveform frequency generation unit, a waveform duty ratio generation unit and a waveform amplitude generation unit, the delay link unit receives an external input signal, generates a delay signal and transmits the delay signal to the waveform frequency generation unit and the waveform duty ratio generation unit respectively, and output signals of the waveform frequency generation unit and the waveform duty ratio generation unit are transmitted to the waveform amplitude generation unit. The waveform amplitude generation unit outputs a pulse waveform; the waveform frequency generation unit and the waveform duty ratio generation unit respectively comprise a D trigger. The delay link unit is used for generating the delay signal, and the D triggers in the waveform frequency generation unit and the waveform duty ratio generation unit are used for processing the delay signal, so that the accurate control of the signal hopping edge can be realized under the condition of not depending on a high-frequency clock.

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 present invention discloses a highly stable and adjustable triangular wave generator circuit. It includes a waveform comparison control loop, a waveform generation circuit, and a signal shaping and amplification loop; the waveform comparison control loop includes a comparator U3, the inverting input terminal of the comparator U3 is grounded, and the output terminal is connected to the base of the NPN transistor D2, the cathode of the Schottky diode D1, and one end of the resistor R1. The other end of the resistor R1 is connected to the collector of the transistor D2 and is connected to the positive power supply V+. The emitter of the transistor D2 and the anode of the Schottky diode D1 are connected in parallel to form a control output. The present invention has a brand-new idea for generating triangular carrier waves. Through reasonable design of the parameters of discrete devices, not only can the circuit change the frequency of the triangular wave, but also the amplitude can be adjusted. The most important thing is that the stability and reliability of its circuit system can be self-controlled, and the combined structure is simple and the debugging is very convenient.

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 relates to the technical field of pulse power supplies, in particular to a variable-resistance voltage-regulating low-noise pulse power supply system. Comprising a power supply module, a main control module, a negative voltage generation module, a reference voltage generation module and a pulse generation and boosting module, the power supply module is respectively connected with the main control module, the negative voltage generation module, the reference voltage generation module and the pulse generation and boosting module; the main control module, the negative voltage generation module, the reference voltage generation module and the pulse generation and boosting module are connected in sequence; the main control module is connected with the pulse generation and boosting module; the inductance characteristic of a coil on the primary side of the transformer, namely the characteristic that inductive current cannot suddenly change, is utilized, and a resistor in a circuit is matched to generate pulse high voltage. The pulse power supply system provided by the invention is low in baseline noise, and compared with an existing pulse power supply, the baseline noise is lower, the sensitivity is higher, and unnecessary ionization of helium cannot be caused.