1495 results about "Pulse generator" patented technology

Electroporation-based therapies (EBTs) employ high voltage pulsed electric fields (PEFs) to permeabilize tumor tissue, resulting in changes in passive electrical properties detectable using electrical impedance spectroscopy (EIS). Currently, commercial potentiostats for EIS are limited by impedance spectrum acquisition time (˜10 s); this timeframe is much larger than pulse periods used with EBTs (˜1 s). Fourier Analysis SpecTroscopy (FAST) is introduced as a methodology for monitoring tissue inter-burst impedance (diagnostic FAST) and intra-burst impedance (therapeutic FAST) during EBTs. FAST is a rapid-capture (<<1 s) technique which enables monitoring of inter-burst and intra-burst impedance during EBTs in real-time. FAST identified a frequency which delineates thermal effects from electroporation effects in measured impedance. Significance: FAST demonstrates the potential to perform EIS, in addition to intra-burst impedance spectroscopy, using existing pulse generator topologies.

Embodiments of the present disclosure may include a neuromodulation system. The neuromodulation system can include an implantable pulse generator configured to provide neuromodulation to a patient based on a sequence of neuromodulation programs. The implantable pulse generator can include alternately accessible memories. The alternately accessible memories can enable the implantable pulse generator to store a second neuromodulation program while providing neuromodulation according to a first neuromodulation program. The IPG can then transition from providing stimulation according to the first neuromodulation program to providing stimulation according to the second neuromodulation program without stopping stimulation. The neuromodulation system can include a parameter memory. Stimulation parameter updates can be written to the parameter memory. The value of the parameter memory can be used to determine the next stimulation pulse. The IPG can accordingly support pulse-to-pulse changes in stimulation parameters.

An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter, including: a comparator configured to compare a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in a comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier (TA) configured to generate, at an output terminal of the TA, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between an output terminal of the TA and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the TA and a ramp voltage having a gradient proportional to a switching frequency of the Buck converter.

A computing device and an operating method of the computing device based on a spiking neural network (SNN) are disclosed. The computing device includes a pulse generator configured to generate a pulse corresponding to an input spike signal; an SNN including layers of spiking neurons each generating an output spike signal by applying the pulse to a neuron model; and a loss circuit module configured to calculate a loss value based on a potential value accumulated by the output spike signal generated for each of the layers and backpropagate the loss value to the SNN.

A display apparatus comprises a light source configured to emit a light beam, a pulse generator configured to generate a pulse train, a buffer configured to store pixels of an image, a controller configured to modulate the pulse train according to the pixels and to drive the light source according to the modulated pulse train, a mirror assembly configured to oscillate and scan the light beam over an image area according to a scan pattern, and a mirror driver configured to drive the mirror assembly, the pulse generator being configured to receive a brightness signal and to generate the pulse train with a low / high pulse rate when the brightness signal indicates a low / high brightness. A method displays pixels of an image with a low / high pulse rate at a low / high brightness.

The air-pulse generating device comprises a film structure, operating at an ultrasonic operating frequency, and a resonant chamber, formed on a side of the film structure. A resonance is formed within the resonance chamber. Due to the resonant chamber, the APG device has a peak on a frequency response of an acoustic property of the APG device at the ultrasonic operating frequency.

The invention provides a clock signal generating circuit, a wired communication transceiver and electronic equipment, and the circuit outputs a first DC voltage comprising phase difference information and frequency difference information of a reference clock signal and a feedback clock signal through a phase frequency detection module. The pulse generator generates a narrow pulse signal based on the DC voltage and a reference clock signal, the oscillation frequency of each secondary ring oscillator in the cross-coupled ring oscillator is controlled by the first DC voltage, and the cross-coupled loop performs synchronous coupling and phase sequence adjustment processing on each secondary ring oscillator. One output node in the cross coupling ring oscillator receives the narrow pulse signal, frequency and phase locking is completed in an injection locking mode, and the frequency divider is used for conducting frequency division processing on any high-frequency clock signal and outputting a feedback clock signal. Therefore, a high-frequency multi-phase clock signal with low phase noise and high phase precision can be generated by using the low-frequency reference clock signal.

Embodiments of the disclosure include apparatus (e.g., plasma processing systems) and methods for the plasma processing of a substrate in a processing chamber. Some embodiments are directed to a method for waveform generation, which generally includes delivering a radio frequency (RF) waveform at a frequency for a first period of time using a RF generator and then halting the delivery of the RF waveform for a second period of time, and delivering a pulsed voltage waveform at a first voltage for at least a portion of a third period of time using a pulser, wherein the delivery of the pulsed voltage waveform overlaps with the delivery of the RF waveform during a portion of the second period of time.

The invention relates to the technical field of hydraulic test of nickel alloy pipes, and discloses a hydraulic test system for a thin-wall nickel alloy pipe. According to the system, in the axial loading state of the thin-wall nickel alloy pipe, a closed water pressure cavity is established through an annular sealing clamp, and then strain distribution data on the surface of the pipe body is collected through a distributed optical fiber sensor array. And constructing a three-dimensional stress field reconstruction model based on the acquired strain distribution data, calculating an equivalent plastic deformation threshold value of the pipe body under different water pressure gradients, adjusting a water pressure loading curve slope parameter according to the equivalent plastic deformation threshold value, and generating a dynamic water pressure loading instruction. And the high-frequency pressure pulse generator executes the instruction, synchronously triggers the X-ray diffractometer to collect lattice distortion data of the tube body, inputs the data into the material microscopic damage evolution model, and outputs a microscopic defect spatial distribution map. And finally, material constitutive parameters of the three-dimensional stress field reconstruction model are corrected based on the atlas, closed-loop feedback control is formed, and multi-dimensional data acquisition and accurate management and control of the thin-wall nickel alloy pipe hydrostatic test are achieved.

The invention relates to an electromagnetic pulse collaborative deicing system based on multi-mode perception. The system comprises a power supply system; the FPGA controller is used for logic control and signal processing, calculating electromagnetic pulse parameters and realizing high-speed and accurate deicing instruction scheduling; a sensing module; a real-time detection system; a pulse generation unit; and the deicing module executes an electromagnetic pulse deicing action and efficiently removes ice covered on the surface of the power grid. The invention further discloses an electromagnetic pulse collaborative deicing method based on multi-mode sensing. Through the electromagnetic pulse technology, the power transmission and distribution line ice can be efficiently removed, compared with a traditional thermal ice melting method, the energy consumption is greatly reduced, the response speed is remarkably increased, and the deicing strategy and parameters are dynamically adjusted according to real-time monitoring data based on the real-time signal processor of the FPGA; the power supply priority can be dynamically adjusted according to the energy supply condition, the energy is improved to the maximum extent, and an accurate deicing basis is provided for the system.

The utility model discloses a mandarin fish domestication feeding device which comprises a feeding pipeline and a bait temporary storage tank arranged at the upper end of the feeding pipeline, a feeding hopper is arranged at the upper end of the bait temporary storage tank, and the feeding pipeline comprises a vertical pipe with the upper end in butt joint with the bait temporary storage tank and a horizontal discharging pipe in butt joint with the bottom of the vertical pipe. One end of the horizontal discharge pipe is connected with a high-pressure water source or air source; the vertical pipe is of a multi-section telescopic rod structure. A cathode ring piece and an anode ring piece are arranged at the two ends of the vertical pipe, and the cathode ring piece and the anode ring piece are connected with a pulse generator used for outputting pulse signals and a pulse power amplifier used for controlling output voltage through wires. The fish feeding device can achieve feeding at different depths, can feed live fish, dead fish and feed according to different proportions, is simple and convenient to operate, greatly reduces the workload of manual feeding, and can be widely applied to the field of bait feeding.

The invention relates to a device for performing electric field treatment on a digestive tract, which comprises a support body, an electrode array film and a pulse generator, an electrode is coupled to the pulse generator through an electrode lead embedded in a film body, an electric heating wire is further embedded in the film body, and the electric heating wire is connected with the support body. The heating wire is coupled to a pulse signal output end of the pulse generator through a heating wire lead embedded in the membrane body, at least one electric connection point is arranged between the heating wire and the electrode on the electrode array membrane, and a voltage signal between the heating wire lead and the electrode lead serves as a temperature sensing signal. The temperature sensing circuit and the electric heating circuit are integrated, the circuit is simple, and leads on the electrode array film are reduced.

Systems, devices, and methods described herein relate to generation and delivery of pulsed waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train including a plurality of biphasic pulses, each biphasic pulse of the plurality of biphasic pulses including a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses can be separated by a pulse-to-pulse delay such that the plurality of biphasic pulses is separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays can include increasing or decreasing sequences of pulse-to-pulse delays.

The present invention discloses a pulse generator and a pulse rod, which relate to the field of pulse circuit technology. The pulse generator includes a frequency control unit, a dual closed-loop pulse amplification unit, a digital signal processing unit and an adaptive power management unit. The frequency control unit includes an environmental sensor and a microcontroller. The microcontroller can calculate a preset pulse frequency based on information transmitted by the environmental sensor. The input end of the dual closed-loop pulse amplification unit can receive a pulse signal transmitted by the microcontroller, amplify it to a preset pulse frequency, and provide a pulse current to an electrostatic elimination needle. The digital signal processing unit can digitize the pulse signal to enhance the anti-interference ability of the pulse signal. The adaptive power management unit includes a dynamic voltage regulation module electrically connected to an external power supply, and the dynamic voltage regulation module can dynamically adjust the output voltage. The technical solution provided by the present invention can provide a pulse generator with high stability, a wide adjustment range and strong anti-interference ability.

An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter including: a comparator configured to generate a comparator output signal by comparing a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in the comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier configured to generate, at an output terminal of the transconductance amplifier, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between the output terminal of the transconductance amplifier and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the transconductance amplifier and a ramp voltage generated by the ramp signal generator.

A distributed acoustic system (DAS) that may include two or more lasers that each transmit a continuous wave (CW) light, a pulser disposed after the two the two or more lasers and optically connected to each of the two or more lasers to receive the CW light from each of the two or more lasers and form a light pulse, and an optical amplifier, wherein the pulser is optically connected to the optical amplifier to receive the light pulse from the pulser as an input. The DAS may further include a splitter optically connected to the optical amplifier to optically split the light pulse into two or more light pulses for each output of the splitter a circulator optically connected to each output of the splitter, and a sensor fiber attached to each of the circulators as an output for each circulator.

The invention relates to a programmable frequency divider applied to JESD204B / C. The programmable frequency divider comprises a prescaler which realizes 1 / 2 / 4 dynamic frequency division through a closed-loop feedback structure; according to the 12-bit main frequency divider, the duty ratio of odd-even frequency division is controlled by a 11-stage asynchronous CML frequency-halving chain and a separation DFF0 module; the frequency dividing ratio N is equal to DIV Nlt; 11: 0gt; 2, the odd number frequency division duty ratio is automatically adjusted to (N + 1) / 2N; the cascade noise optimization comprises the following steps of: resampling by using an input clock fin through a retiming trigger (RetimeDFF1 / 2); according to the pulse generator, the number K of pulses output by a four-stage counter is equal to Pulsecount; 3: 0gt; a decimal value; and the output mode circuit supports three-mode direct connection. According to the programmable frequency divider, the HBT process CML unit and the emitter follower are adopted for buffering; and the high-precision clock synchronization requirements of JESD204B / C systems such as a 5G base station and a millimeter wave radar can be met.

A coherent Ising machine may comprise a pump pulse generator configured to generate optical signal pulses; an optical error correction circuit configured to generate optical error pulses; and a main ring cavity configured to store the optical signal pulses and the optical error pulses, wherein the optical error pulses cause the coherent Ising machine not to converge on a local minima of Ising solution and continue to explore nearby states.

The utility model provides an adjustable pulse generator. The adjustable pulse generator comprises an input unit, a control unit and a driving circuit, the input unit is used for receiving a PWM signal parameter value input by a user; the control unit is used for outputting a PWM signal with a preset frequency and a preset duty ratio based on a PWM signal parameter value input by a user; and the driving circuit is used for modulating the PWM signal output by the control unit so as to drive the power semiconductor device to be tested. According to the adjustable pulse generator provided by the invention, parameters such as the frequency and the duty ratio of the pulse signal are adjustable, the circuit structure is simple, the cost is relatively low, and the size of a test tool is reduced.

Systems, devices, and methods described herein relate to generation and delivery of pulsed waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train including a plurality of biphasic pulses, each biphasic pulse of the plurality of biphasic pulses including a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses can be separated by a pulse-to-pulse delay such that the plurality of biphasic pulses is separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays can include increasing or decreasing sequences of pulse-to-pulse delays.

Disclosed are an implantable electrode, a stimulator and a control method therefor, an electronic device, and a storage medium. The implantable electrode comprises: a control module, the control module being configured to receive a gating instruction from a pulse generator and generate a switch control signal; an array switch, the array switch being configured to establish multiple gating channels according to the switch control signal; an electrode array module, the electrode array module comprising multiple contacts, each contact being configured to deliver electrical stimulation to a tissue in a patient via the gating channels established by the array switch, or collect physiological signals from a tissue in a patient. The switch control signal is used to isolate the stimulation contacts from the collection contacts.

The invention provides a high-hardness high-reflectivity hafnium carbide film and a preparation method thereof. The method comprises the following steps: 1) target material position: placing a graphite target, a hafnium target and a substrate; 2) substrate surface pretreatment: performing ultrasonic cleaning on the substrate and then drying the substrate; 3) vacuumizing the chamber and heating the substrate: vacuumizing the chamber to high vacuum and heating the substrate; (4) pre-cleaning the target material: introducing inert gas into the chamber, keeping the working air pressure, and carrying out pre-sputtering cleaning on the target material; and 5) depositing a hafnium carbide film: continuously introducing inert gas into the chamber, keeping the working air pressure, the substrate temperature and the substrate autorotation speed, modulating an intermediate-frequency pulse waveform by adopting a pulse generator, applying the intermediate-frequency pulse waveform to the graphite target and the hafnium target, keeping a current value, and carrying out coating treatment. The hafnium carbide film with the low carbon vacancy concentration and the single-phase rock salt structure can be prepared through the method, and the hafnium carbide film has high hardness and broadband high reflection performance.

The invention relates to the field of radar detection methods, and discloses a microwave photon multiband radar detection method, which comprises the following steps: generating detection signals of multiple bands based on a microwave photon method, transmitting the detection signals to a target, and then carrying out dechirp processing and digital signal processing on target reflection signals to obtain a target detection result. The method specifically comprises the following steps: generating a fundamental frequency signal through a user-defined bit sequence generator, a pulse generator and an electric frequency modulator, adjusting the central wavelength and bandwidth of a signal waveform by the electric frequency modulator, amplifying the power of the fundamental frequency signal by a certain multiple through an electric power amplifier, and modulating by a distributed feedback semiconductor laser, a plurality of sidebands with equivalent power are generated by the spectrum of the optical fiber, a modulated fundamental frequency signal is input into the photoelectric detector through the optical fiber, and then the modulated fundamental frequency signal is amplified by the electric low noise amplifier to generate a multi-band frequency modulation signal. And the multifunctional detection capability of the radar system can be realized.

A light-emitting diode (LED) control unit includes: a pulse generator configured to generate a pulse signal; a T-filter configured to convert the pulse signal into a triangular wave signal; a first gate driver configured to receive the triangular wave signal and output a first gate control signal; a second gate driver configured to receive the first gate control signal and output a second gate control signal; a first switch configured to turn on a first LED string corresponding to a first color temperature based on the first gate control signal; a second switch configured to turn on a second LED string corresponding to a second color temperature based on the second gate control signal; and a power supply circuit configured to supply a power supply voltage to the pulse generator, the first gate driver, and the second gate driver by stepping down an operating voltage of the LED driver.

A voltage-to-delay converter includes a first reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving a reset signal, and a second terminal coupled to a top plate of a first integrating capacitor, and a second reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving the reset signal, and a second terminal coupled to a top plate of a second integrating capacitor. First and second input transistors receive first and second input voltages, and are coupled between the top plate of the first and second integrating capacitors, respectively, and a first current source. A discharge current source is coupled to bottom plates of the first and second integrating capacitors. A pulse generator has first and second inputs coupled to the top plate of the first and second integrating capacitors, respectively.

The invention relates to the technical field of oil field separate-layer oil production, and particularly discloses an oil well pressure pulse control separate-layer oil production tubular column, an intelligent separate-layer oil production device is arranged in the tubular column, the intelligent separate-layer oil production device comprises two oil inlet channels capable of regulating and controlling the liquid inlet flow, and an inlet of one oil inlet channel is formed in the side wall of the tubular column; the intelligent separate recovery device is connected with the pulse receiver through a signal line, the output end of the intelligent separate recovery device is connected with an oil well pump, the oil well pump is connected with a sucker rod and pumps oil out through the sucker rod, a packer is connected to the outside of the tubular column and arranged below the intelligent separate recovery device, a screen pipe is connected to the tubular column below the packer, and the screen pipe is connected with the output end of the intelligent separate recovery device. And the screen pipe is communicated with an inlet of the other oil inlet channel. According to the tubular column, specific pressure pulse codes can be generated in a shaft sleeve through the pressure pulse generator, after the pulse receiver detects and analyzes the codes, the intelligent separate recovery device is controlled to automatically adjust different opening degrees of oil nozzles of corresponding production layers according to different pulse instructions, and oil layer separate recovery is achieved without moving the tubular column.

A voltage-to-delay converter includes a first reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving a reset signal, and a second terminal coupled to a top plate of a first integrating capacitor, and a second reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving the reset signal, and a second terminal coupled to a top plate of a second integrating capacitor. First and second input transistors receive first and second input voltages, and are coupled between the top plate of the first and second integrating capacitors, respectively, and a first current source. A discharge current source is coupled to bottom plates of the first and second integrating capacitors. A pulse generator has first and second inputs coupled to the top plate of the first and second integrating capacitors, respectively.

The invention discloses a nanosecond high-voltage steep pulse generator, which relates to the technical field of high-voltage pulses and comprises a microcontroller, a Marx circuit, a trigger control module, an isolation high-voltage driving module, a safety module and a power management module, the microcontroller comprises a main chip, and parameters of the output end of the Marx circuit are collected in real time through the microcontroller. The trigger control module generates a nanosecond synchronous trigger signal; the isolation high-voltage driving module converts a low-voltage signal of the microcontroller into a high-voltage driving signal; the safety module is used for monitoring the state of the system, immediately cutting off a trigger signal when a fault occurs, and protecting the Marx circuit and the microcontroller; according to the invention, the microcontroller is used for generating synchronous trigger pulses and accurately triggering charging and discharging of the capacitor of the Marx circuit, and the high-speed ADC arranged inside can accurately control and detect voltage balance, trigger signals and fault protection.

The invention discloses a rotor wing shielding fading self-adaptive tracking method and device for helicopter satellite communication. The method specifically comprises the following steps: establishing a rotor shielding mathematical model of helicopter satellite communication, acquiring a signal after rotor shielding fading detected by a helicopter airborne communication terminal, and adding anti-noise filtering to improve a detection signal-to-noise ratio; a rotor shielding waveform is generated according to the measured rotor shielding fading parameters, coarse synchronization of the generated waveform and the detected waveform is carried out, and the system synchronization speed is increased; comparing a parameter error between the rotor shielding waveform generated by the local periodic pulse generator and the measured rotor shielding waveform to obtain an error detection result; and correcting the period, the phase and the width of a rotor shielding waveform generated by a local periodic pulse generator by using an error detection result, so that the rotor shielding waveform can adaptively track the change of rotor shielding. According to the invention, changes of shielding fading depth and shielding time of the helicopter rotor can be adaptively tracked, and the stability of satellite communication of the helicopter is improved.

Disclosed herein is a pulse generator device for trigeminal nerve stimulation. In one embodiment, the pulse generator device comprises a processor(s) configured to: produce pulses delivered to an electrode assembly for a therapy session(s) for a patient, log data from the therapy session(s) (where the data comprises impedance of the electrode assembly connected to the pulse generator and current amplitude of the pulses), determine an average current amplitude from the data, determine an average therapy impedance from the data, determine a charge capacity of a battery of the pulse generator prior to beginning a subsequent therapy session, determine whether the charge capacity of the battery is sufficient to complete the subsequent therapy session for a designated duration of time by using the average current amplitude and the average therapy impedance. Further the pulse generator device comprises a display configured to display a screen comprising a graphical user interface (GUI).