59results about "Pulse train generator" patented technology

A safety grating expansion board and a detection circuit and method for the number of lamp beads are provided, the detection circuit comprises a main control module and at least one expansion module, and the main control module comprises a clock output end, a starting output end and a detection end; each expansion module comprises a pulse latch unit, a clock input end, a first data input end, a first data output end, a second data output end and a second data input end, the clock input end is used for receiving a clock pulse signal, the first data output end is used for outputting a first latch level according to a second latch level or a preset starting signal, and the second data output end is used for outputting a second latch level according to a preset starting signal. The second data output end is used for outputting a second latch level according to the first latch level, and the main control module is configured to determine the number of the expansion modules according to the output times of the clock pulse signals when the detection end recovers from the low level to the high level. According to the embodiment of the invention, the number of the expansion boards can be automatically detected in a production link, manual input errors are avoided, and repeated configuration processes are reduced.

The present disclosure provides systems and methods for an output architecture for an implantable pulse generator of a neurostimulation system. The output architecture includes a power supply, a plurality of outputs, a global source current regulator coupled to the power supply and operable to source current from the power supply to the plurality of outputs through a plurality of source current branches, a global sink current regulator operable to sink current from the plurality of outputs to ground through a plurality of sink current branches, a current source branch selector operable to select, for each of the plurality of outputs, an amount of current sourced from the plurality of source current branches, and a current sink branch selector operable to select, for each of the plurality of outputs, an amount of current sunk to the plurality of sink current branches.

The application provides a radio frequency driving device and a radio frequency power supply system. The radio frequency driving device comprises an input end, an output end, N radio frequency driving units and a gating unit. The N radio frequency driving units are connected in parallel between the input end and the gating unit. The gating unit is connected between the N radio frequency driving units and the output end. The input end is used for connecting with a direct current power supply. The output end is used for connecting with a radio frequency generating device. Each radio frequency driving unit is used for receiving direct current power output by the direct current power supply through the input end and converting the direct current power into target power. The gating unit is used for selectively turning on the connection between one target radio frequency driving unit and the output end, so that the target power generated by the target radio frequency driving unit is output to the radio frequency generating device through the output end. The voltage values of the target power generated by the N radio frequency driving units are different from each other. The application can protect the radio frequency generating device.

Some embodiments include a high voltage waveform generator comprising: a generator inductor; a high voltage nanosecond pulser having one or more solid state switches electrically and / or inductively coupled with the generator inductor, the high voltage nanosecond pulser configured to produce a pulse burst having a burst period, the pulse burst comprising a plurality of pulses having different pulse widths; and a load electrically and / or inductively coupled with the high voltage nanosecond pulser, the generator inductor, and the generator capacitor, the voltage across the load having an output pulse with a pulse width substantially equal to the burst period and the voltage across the load varying in a manner that is substantially proportional with the pulse widths of the plurality of pulses.

A system configured to provide a non-thermal plasma from a variety of feed gases is described. The system includes a plasma applicator; a feed gas source providing a gas flow to the plasma applicator; a power supply configured to deliver electrical power via a transmission line to an electrode of the plasma applicator; a signal generator configured to provide a drive signal to the power supply; and a controller. The controller is configured to receive at least one input status parameter associated with a quality of plasma delivered by the plasma applicator; and provide at least one parameter value for at least one parameter defining an output signal waveform of the power supply. The at least one parameter value is taken from the group consisting of: duty factor, pulse rate, pulse width, pulse delay, pulse modulation and pulse shape.

A method serves for operating a drive unit comprising an active element (1) having a resonator (2) and an excitation means (23) for exciting oscillations in the resonator (2) and thereby driving a passive element (4). The method comprises the steps of • driving the excitation means (23) with a driving signal, the driving signal being a periodic signal comprising driving pulses repeated with an excitation frequency; • depending on a control signal, modifying the driving signal by: o if the control signal is within a first range, modifying the excitation frequency or modifying the shape of the driving pulses, and o if the control signal is within a second range, repeatedly omitting driving pulses.

The invention discloses a square wave generating circuit which comprises an initial waveform circuit and a hysteresis comparator circuit, the initial waveform circuit is connected with the hysteresis comparator circuit, the initial waveform circuit is used for generating an initial square wave signal, and the hysteresis comparator circuit is used for generating a hysteresis comparator; an energy storage unit in the initial waveform circuit is charged or discharged according to the level state of the initial square wave signal, so that a first end of the energy storage unit generates an intermediate waveform signal; and the hysteresis comparator circuit is used for receiving the intermediate waveform signal, comparing the intermediate waveform signal with a preset threshold voltage, and generating a target square wave signal according to a comparison result. Therefore, the square wave generating circuit can improve the condition that the output waveform has clutters, and improves the signal quality of the target square wave signal.

In one embodiment, a pulse generating device for generating output pulses (P2) with pulse durations in the range of nanoseconds or shorter comprises a signal source (10) for providing an input current (11) comprising input pulses (P1) of an input pulse duration (P1); a pulse shortening circuit (20) coupled to the signal source (10), which has a delay line (21) and is configured to provide the output pulses (P2) based on the input current (11), wherein a pulse duration of the output pulses (P2) is shorter than the input pulse duration; and a heating source (30) coupled to the pulse shortening circuit (20) for providing a heating current (I2) for the delay line (21) of the pulse shortening circuit (20). The delay line (21) is designed to heat up to an at least substantially constant operating temperature using the heating current (I2).

To provide surface charge and power feedback as well as control using a switch mode bias system.SOLUTION: There are provided systems, methods and apparatus for regulating ion energies in a plasma chamber and avoiding excessive and damaging charge buildup on the substrate surface and within capacitive structures being built on the surface. An exemplary method includes placing a substrate in the plasma chamber, forming a plasma in the plasma chamber, controllably switching power to the substrate so as to apply a periodic voltage function (or a modified periodic voltage function) to the substrate, and modulating, over multiple cycles of the periodic voltage function, the periodic voltage function responsive to a defined distribution of energies of ions at the surface of the substrate so as to effectuate the defined distribution of ion energies on a time-averaged basis, and to maintain surface charge buildup below a threshold.SELECTED DRAWING: Figure 52

A stagger signal generation circuit is provided. The stagger signal generation circuit includes: a stagger pulse generation circuit, configured to generate a first pulse signal according to a first control signal and generate a second pulse signal according to a second control signal, the first control signal and the second control signal being inverted signals, and the first pulse signal and the second pulse signal being stagger pulse signals; and a delay signal output circuit including G signal output circuits, G being an integer greater than or equal to 2. Each non-first-stage signal output circuits receives a delay output signal outputted by a respective previous-stage signal output circuit as an input signal of a current-stage signal output circuit, and a first-stage signal output circuit receives an initial input signal as an input signal of the first-stage signal output circuit. The embodiments of this application generate a first pulse signal and a second pulse signal with adjustable periods, and generate a delay signal with a controllable delay according to the first pulse signal and the second pulse signal, and an area of a circuit layout is small, and the power consumption of the circuit is low.

A switching assembly for transferring trains of pulses, including a first terminal and a second terminal. A first plurality of first relays is connected in parallel, and have first contacts connected to the first assembly terminal, and second contacts. A first capacitor is connected in parallel with the first relays. A second plurality of second relays is connected in parallel, and have third contacts, and fourth contacts connected to the second assembly terminal. A second capacitor is connected in parallel with the second relays. A connection connects the second contacts to the third contacts. The pulses have amplitudes of at least 2 kilovolts. On activation of the first and second relays the first and second contacts connect and the third and fourth contacts connect, so that the first and second assembly terminals connect. On deactivation of the first and second relays the first and second assembly terminals disconnect.

The utility model provides a high-precision-based intervisibility weapon deduction system, relates to the technical field of weapon deduction, and provides a more real signal generation and processing scheme, which comprises a waveform simulation module, a data acquisition card, a signal simulation module, an upper computer and other components. Through the combination of a waveform generator in the waveform simulation module and multiple groups of filters, the system can generate high-quality square wave signals, and the phase is adjusted through a phase shifter to ensure that the phases of fundamental waves and harmonic waves are consistent, so that the precision of the signals is improved. In addition, the design of the adjustable attenuator allows the amplitude and power of the analog waveform to be flexibly adjusted, and the adaptability of the signal in different analog scenes is ensured.

The invention discloses a comb spectrum generator adopting a direct frequency synthesis mode. The comb spectrum generator comprises an amplifier, a harmonic generator circuit, a frequency division filter circuit, three power dividers and a frequency mixing filter circuit, a reference signal is amplified by an amplifier and then enters a harmonic generator circuit, four dot frequency signals with frequencies of 240MHz, 1560MHz, 1680MHz and 240MHz are generated by the harmonic generator circuit and then enter a frequency division filter circuit, the four dot frequency signals are subjected to frequency division and filter amplification in the frequency division filter circuit, and four dot frequency signals with pure frequency spectrums, stepping of 4MHz and frequencies of 48MHz, 52MHz, 56MHz and 60MHz are obtained. The comb spectrum signals are respectively sent to the three power dividers, are divided into three paths of power and are output to the frequency mixing filter circuit, the comb spectrum signals with the step of 1 MHz and the output frequency of 144-207 MHz are finally output after the comb spectrum signals pass through the frequency mixing filter circuit, and the number of frequency points is 64.

A high-voltage pulsing power supply system is disclosed that includes a DC power source, a switch circuit electrically coupled to the DC power source, a droop control circuit coupled to the switch circuit, and / or an output. The switch circuit includes a plurality of switch modules and generates a plurality of pulses. The droop control circuit includes a droop diode, a droop inductor, and a droop element. The droop diode may be electrically coupled in series between the switch circuit and a primary winding of a transformer and allows negative pulse portions of the plurality of pulses to pass from the switch circuit to the primary winding of the transformer. The droop inductor and droop element are disposed in series across the droop diode to allow negative pulse portions of the plurality of pulses to pass from the switch circuit to the primary winding of the transformer and / or store energy from the negative pulse portions of the plurality of pulses.

Method for generating a pulse (7, 9; 207, 209; 307, 309; 407, 409), wherein a predetermined first boundary curve (3) and a predetermined second boundary curve (5) are defined for a pulse shape of the pulse (7, 9; 207, 209; 307, 309; 407, 409), wherein the boundary curves (3, 5) describe the time course of a current quantity (I), and wherein the second boundary curve (5) lies completely within the first boundary curve (3), characterized in that a curve inscribed between the boundary curves (3, 5) is generated as the pulse shape for the pulse (7, 9; 207, 209; 307, 309; 407, 409) by means of a current sink (37), which – compared to a rectangular pulse inscribed between the boundary curves (3, 5) – is located in a first region of the current quantity that is away from an extremum. (I) is deformed towards the first limit curve (3), and in a second region of the current quantity (I) facing the extremum is deformed towards the second limit curve (5).

The invention relates to the technical field of analog integrated circuits, in particular to a high-precision temperature sensor temperature-sensing front-end circuit based on a chopping technology, and aims to solve the problems of low-frequency 1 / f noise, operational amplifier input offset voltage drift, band-gap reference temperature drift, limited output driving capability and the like existing at the front end of a traditional temperature sensor. The front-end circuit comprises a chopping band-gap reference source circuit, a chopping buffer circuit and a two-phase non-overlapping clock generation circuit, wherein the chopping band-gap reference source circuit adopts a parasitic bipolar PNP transistor with an emitter junction area ratio of 8: 1 as a temperature sensing device, and a high-gain chopping folded cascode operational amplifier is embedded in the chopping band-gap reference source circuit; and stable positive temperature coefficient voltage and low-temperature drift reference voltage are generated. Noise and maladjustment are inhibited from the system architecture level, the temperature measurement precision can reach the sub-degree centigrade level, the loading capacity is high, the method is achieved based on the standard CMOS technology, a special technology and complex temperature calibration are not needed, and the method has the advantages of being low in cost, high in stability and large-scale integration.

This application provides a radio frequency (RF) driving device and an RF power supply system. The RF driving device includes an input terminal, an output terminal, and N RF driving circuits connected between the input terminal and the output terminal. The input terminal and the output terminal are respectively connected to a DC power supply and an RF generator. Each RF driving circuit has a driving state and a stopped driving state. Each RF driving circuit is used to convert DC power into target power when in the driving state, and to stop receiving DC power from the DC power supply when in the stopped driving state. The driving output terminals of the N RF driving circuits are connected in sequence and connected to the output terminal through the driving output terminal of the last RF driving circuit to form an output path, so that the target power output by the RF driving circuit in the driving state is transmitted to the output terminal through the output path and then output to the RF generator. This application can protect the RF generator.

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 invention provides a mud positive pulse encoding method, a mud positive pulse decoding method, equipment and a mud positive pulse decoding system, and belongs to the field of oil-gas exploration. The coding method comprises the following steps: determining the digit of binary data to be coded; splitting the binary data into at least two sub-binary data on the basis of a splitting rule in response to the condition that the bit number is greater than a threshold value; constructing corresponding sub-data frames for representing the sub-binary data based on the digits and numerical values of each piece of sub-binary data; and generating a slurry positive pulse signal based on each of the sub-data frames. The invention also provides a decoding method corresponding to the coding method and corresponding coding and decoding equipment and system. Different binary numbers are represented by combining a plurality of characteristics such as pulse number, pulse position, pulse width, splitting rule and the like, so that the waste of transmission bandwidth resources can be reduced, the transmission rate of the positive pulse signal is effectively improved, and the power consumption of the mud pulse generator is reduced.

Described herein are apparatuses and methods for applying high voltage, high current, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e.g., tissues, cells, etc., while preventing damage from load arcing. Some of the apparatuses and methods described herein may limit the load and pulsed power source current in case of load arcing significantly by using a transmission line (e.g., coaxial cable, twisted pair or parallel pair cables) between the pulsed power source and the load having a length configured to achieve this goal.

The utility model discloses a differential signal processing circuit and a component-level power electronic device. The differential signal processing circuit comprises a differential signal sampling module, a filtering module and a signal processing module; the first input end of the differential signal sampling module is connected with the first end of the differential signal source; the second input end of the differential signal sampling module is connected with the second end of the differential signal source; the differential signal sampling module is used for outputting a first differential signal according to a first sampling signal and a second sampling signal output by a differential signal source; the input end of the filtering module is connected with the output end of the differential signal sampling module; the first input end of the signal processing module is connected with the output end of the filtering module to receive the characteristic signal; the second input end of the signal processing module is connected with the first reference signal source, and the signal processing module is used for outputting an adjusting signal according to the characteristic signal. According to the differential circuit, the practicability and adaptability of the differential circuit in the actual use process are improved.

Described herein are apparatuses and methods for applying high voltage, high current, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e.g., tissues, cells, etc., while preventing damage from load arcing. Some of the apparatuses and methods described herein may limit the load and pulsed power source current in case of load arcing significantly by using a transmission line (e.g., coaxial cable, twisted pair or parallel pair cables) between the pulsed power source and the load having a length configured to achieve this goal.

Described herein are apparatuses and methods for applying high voltage, high current, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e. g., tissues, cells, etc., while preventing damage from load arcing. Some of the apparatuses and methods described herein may limit the load and pulsed power source current in case of load arcing significantly by using a transmission line (e.g., coaxial cable, twisted pair or parallel pair cables) between the pulsed power source and the load having a length configured to achieve this goal.

The invention discloses a clock switching circuit, which is characterized in that after a crystal oscillator failure detection module detects that a crystal oscillator fails, a crystal oscillator clock is subjected to low-pass clock gating by using a negated crystal oscillator failure signal, so that the crystal oscillator clock after clock gating is stopped, and the crystal oscillator clock after clock gating after crystal oscillator failure is prevented from overturning. When the crystal oscillator failure signal is at a low level, the clock synchronization module outputs the low level; when a crystal oscillator failure signal is changed from a low level to a high level and a first falling edge appears in the RC clock in the chip, the clock synchronization module outputs the high level, and the falling edge of the output signal of the clock synchronization module is later than the falling edge of the RC clock in the chip and earlier than the next rising edge. And the multiplexer performs time sequence check on the output signal of the clock synchronization module and the RC clock in the chip, so that no burr is generated when the crystal oscillator fails and is switched to the RC clock in the chip, and the system can work normally.

A pulse generator (100), for generating a periodic square wave signal in response to a periodic input signal, includes a first inverter (106), a negative-feedback circuit (108), an adjustable current source (110), and a second inverter (112). The first inverter is configured to invert the periodic input signal, thereby generating a periodic wave. The negative-feedback circuit is configured to couple an output of the first inverter to an input of the first inverter, thereby setting the first inverter in a linear mode. The adjustable current source is coupled to the negative-feedback circuit and is configured to load the first inverter, thereby modifying a duty cycle of the periodic wave produced by the first inverter. The second inverter is configured to invert the output of the first inverter, thereby generating the periodic square wave.

The application discloses an electric stimulation pulse circuit and a therapeutic instrument, and relates to the technical field of medical instruments, and comprises an electric stimulation pulse generation module, a pulse voltage detection module, a pulse current detection module and a control module.The electric stimulation pulse generation module is used for outputting electric stimulation pulses to a load through an electrode module.The pulse voltage detection module is used for collecting pulse voltages output by the electric stimulation pulse generation module to the load and performing signal filtering on the pulse voltages.The pulse current detection module is used for collecting pulse currents output by the electric stimulation pulse generation module to the load and performing signal filtering on the pulse currents.The control module is used for calculating an impedance value of the load according to the filtered pulse currents and the filtered pulse voltages, and is also used for controlling the electric stimulation pulse generation module to stop outputting electric stimulation pulses to the load when it is detected that the impedance value is not within a preset impedance range, so that the accuracy of impedance value calculation is improved without adding high-cost devices such as sensors, and the safety and treatment hidden dangers existing in the treatment process of users are effectively avoided.