118results about "Pulse train generator" patented technology

The invention discloses an electric tactile feedback method and circuit, intelligent wearable equipment and a program product, and relates to the technical field of virtual reality interaction, the electric tactile feedback method is applied to the intelligent wearable equipment, the intelligent wearable equipment is configured with an electrode array, and the electric tactile feedback method comprises the following steps: obtaining target tactile feedback information, wherein the target tactile feedback information comprises a target contact position; according to the target contact position, a preset electrode mapping table is inquired, a conduction electrode combination is obtained, and the superposition position of an electrode electric field in the conduction electrode combination is the target contact position; electrodes, corresponding to the conduction electrode combinations, in the electrode array are sequentially controlled to be conducted, so that tactile feedback is generated at the target contact position. The technical problem that an existing electric tactile feedback method is low in tactile feedback resolution is solved.

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 a 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.

The invention provides a multi-waveform magnetic field generating device for magnetic hyperthermia. The multi-waveform magnetic field generating device comprises a power supply module, a BUCK voltage regulating circuit, a multi-waveform signal generating circuit, a power amplifying circuit, a series resonance inverter circuit, an induction coil, a water cooling module, a temperature acquisition module, a DSP microprocessor and a TFT display screen. The power supply module is combined with BUCK to supply power to the device; the multi-waveform signal generation circuit, the power amplification circuit and the series resonance inverter circuit are used for generating an alternating magnetic field to act on a magnetic medium to generate a heat effect and realize magnetic hyperthermia; the water cooling module is used for reducing the temperature of the induction coil; the temperature acquisition module acquires temperature data of a treatment area and performs output control on the Buck voltage regulation circuit by using the DSP microprocessor so as to regulate the output power of the power amplification circuit powered by the BUCK voltage regulation circuit and realize intelligent temperature control of the magnetofluid; the problems that in the prior art, a magnetic field generation device is single in induction waveform and poor in heat generation effect are solved.

A system, method, and apparatus for adjusting ion energy in a plasma chamber to avoid excessive and damaging charge buildup on a substrate surface and in capacitive structures constructed on the surface includes placing a substrate in the plasma chamber, forming a plasma in the plasma chamber, controllably switching power to the substrate to apply a periodic voltage function (or a modified periodic voltage function) to the substrate, and modulating the periodic voltage function over multiple cycles of the periodic voltage function in response to a defined distribution of ion energy at the surface of the substrate to, on a time-averaged basis, produce the defined distribution of ion energies and maintain surface charge buildup below a threshold.

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 invention relates to the technical field of integrated circuits, and discloses a data generation circuit for a high-speed transmitter. The circuit adopts a two-stage structural design, a first-stage circuit unit generates a narrow pulse signal through cooperation of an input tube, a pre-discharge control tube, a reset control tube and a pre-charge control tube, and a second-stage circuit unit converts a non-full-swing pulse signal into a full-swing signal through a pull-down tube and a plurality of pull-up tubes and outputs the full-swing signal. According to the invention, stable and reliable signal generation and shaping in an ultra-high-speed scene with a unit time interval less than or equal to 10 picoseconds are realized, and the device is suitable for a high-speed transmitter with a 1 / 4 rate or a 1 / 8 rate, and has the characteristics of simple structure and accurate time sequence.

The invention discloses an electric tactile feedback circuit, intelligent wearable equipment and a control method thereof, and belongs to the technical field of virtual reality interaction. The electric tactile feedback circuit comprises a power module, a control module, a booster circuit, a current limiting circuit, a stimulation waveform generation module and an electrode array. The boost circuit is connected with the power supply module and the control module and is used for boosting the initial voltage input by the power supply module to a predetermined voltage. The current limiting circuit is respectively connected with the booster circuit and the stimulation waveform generation module and is used for limiting the input current input into the stimulation waveform generation module within a specified current threshold value; the stimulation waveform generation module is connected with the control module and the electrode array and used for generating and outputting a composite alternating current stimulation signal to the electrode array so as to generate electric tactile feedback, and the composite alternating current stimulation signal comprises a pair of alternating current stimulation signals with opposite phases. The technical problem that an existing electric tactile feedback scheme has large potential safety hazards is solved.

The present invention discloses a square wave generator with adjustable duty cycle, which includes a comparator U1A and a comparator U1B. The pin 6 of the comparator U1B is electrically connected to the collector of a triode Q2, the pin 2 of the comparator U1A, one end of a capacitor C1 and the positive electrode of a diode D3. The other end of the capacitor C1 is grounded. The emitter of the triode Q2 is electrically connected to one end of a resistor R3, and the other end of the resistor R3 is electrically connected to the negative electrode of a diode D4 and an input power supply V1+. The base of the triode Q2 is electrically connected to the positive electrode of the diode D4 and one end of a resistor R4, and the other end of the resistor R4 is grounded. The square wave generated by the present invention is a positive voltage unipolarity, and the duty cycle can be automatically adjusted following the input voltage, and thus the duty cycle can be automatically adjusted following the feedback signal in specific occasions where it is required.

The invention discloses a modulation pulse width generation circuit for an electromagnetic resonance high-frequency fatigue testing machine, and relates to the field of material fatigue tests. The circuit comprises a load sensor, a signal conditioning unit, a summing amplifier, a polarity detection circuit, a peak detection circuit, a sampling level unit, a ramp generator, a modulation square wave circuit, a delay synchronization unit and a modulation pulse width output unit. The method comprises the following steps: acquiring a force value borne by a metal material in an electromagnetic resonance high-frequency fatigue testing machine through a load sensor; through amplification and filtering of the signal conditioning unit, comparison of the summing amplifier, polarity judgment of the polarity detection circuit, peak detection of the peak detection circuit, sampling of the sampling level unit, oblique wave processing of the oblique wave generator, modulation of the modulation square wave circuit, and filtering and shaping of the delay synchronization unit, the delay synchronization unit can be used to carry out synchronization. Finally, modulation pulse width is generated through the modulation pulse width output unit. The real-time performance, the stability and the response speed of excitation of the electromagnetic resonance high-frequency fatigue testing machine can be improved.

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 invention discloses a differential signal generation circuit. The differential signal generation circuit includes: an oscillator that generates a plurality of clock signals; the duty ratio adjusting module is used for respectively adjusting the duty ratio of each clock signal so as to obtain a plurality of clock signals; the logic module is used for providing differential signal pairs with complementary phases according to the plurality of clock signals, the oscillator comprises N stages of mutually connected phase inverters, the output ends of the N stages of phase inverters are used for providing the plurality of clock signals, and initial phase differences exist among the plurality of clock signals. The differential signal generation circuit is high in precision and simple in circuit structure.

The invention discloses a modulatable and bipolar high-voltage square wave generating circuit, which comprises a power supply unit, a low-voltage square wave generating unit, a high-voltage amplifying unit, an adjusting unit and an MCU (Microprogrammed Control Unit), the power supply unit comprises a low-voltage unit and a high-voltage unit, the low-voltage square wave generating unit comprises a grid driving chip U6, an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) Q1 and an MOSFET Q2, the high-voltage amplifying unit comprises an operational amplifier U1, and the high-voltage amplifying unit comprises a high-voltage amplifying unit, an adjusting unit and an MCU (Microprogrammed Control Unit). The power supply of the operational amplifier U1 is connected with the high-voltage unit, the input signal of the high-voltage amplifying unit is connected with the low-voltage square wave generating unit, the adjusting unit comprises a digital potentiometer U10, the adjusting unit is connected with the MCU unit, and the MCU unit is connected with the power supply unit, and is connected with and controls the input level of the gate driving chip U6. The amplitude and the frequency of a low-voltage square wave signal are adjusted through the gate driving chip U6 and the digital potentiometer U10, and then the amplitude and the frequency of a bipolar high-voltage square wave circuit are adjusted through the operational amplifier U1 in the high-voltage amplification unit, so that multi-voltage adjustment in the microfluidic liquid drop driving process is facilitated.

This application discloses a differential signal generation circuit. The differential signal generation circuit includes: an oscillator that generates multiple clock signals; a duty cycle adjustment module that adjusts the duty cycle of each clock signal to obtain multiple clock signals; and a logic module that provides phase-complementary differential signal pairs based on the multiple clock signals. The oscillator includes N stages of interconnected inverters, and the output ends of the N stages of inverters provide multiple clock signals, each with an initial phase difference. The differential signal generation circuit of this application has high precision and a simple circuit structure.

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.

The invention discloses a comb spectrum generator and electronic equipment. According to the comb spectrum generator, a bias module, an input matching module and a selection module are sequentially connected, the selection module is further connected with an odd comb spectrum generation module and an even comb spectrum generation module, and the odd comb spectrum generation module and the even comb spectrum generation module are both connected to an output matching module; the odd comb spectrum generation module comprises a first odd pulse generation unit, an odd intermediate matching unit and a second odd pulse generation unit which are connected in sequence; the bias module is used for providing bias voltage; the input matching module is used for performing impedance matching on an input signal; the selection module is used for controlling an input signal to be input to the odd comb spectrum generation module or the even comb spectrum generation module so as to generate odd harmonics or even harmonics; and the output matching module is used for carrying out impedance matching on odd harmonics or even harmonics. According to the comb spectrum generator provided by the embodiment of the invention, the applicability and the use flexibility of the comb spectrum generator can be improved.

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 broadband impulse generator includes a first delay line and a second delay line that receive an input signal and include a plurality of delay elements connected in series with each other, an oscillation signal generator that generates an oscillation signal having a certain number of pulses during a target impulse duration based on the input signal and an output signal of the first delay line, an envelope signal generator that generates a plurality of envelope signals having a delay duration with each other and having a certain voltage level during the target impulse duration, based on the input signal and an output signal of the second delay line, and an impulse signal generator that generates an impulse signal having the certain number of pulses during the target impulse duration based on the plurality of impulse signals and the oscillation signal.

The invention 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 being connected with a direct-current power supply, and the output end is used for being connected with the radio frequency generating device; wherein each radio frequency driving unit is used for receiving direct-current electric energy output by the direct-current power supply through the input end and converting the direct-current electric energy into target electric energy. The gating unit is used for selectively conducting connection between one target radio frequency driving unit and the output end, so that target electric energy generated by the target radio frequency driving unit is output to the radio frequency generation device through the output end. Wherein the voltage values of the target electric energy generated by the N radio frequency driving units are different from each other. According to the invention, the radio frequency generation device can be protected.

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.

An embodiment of the present invention provides an interlaced signal generating circuit, comprising: an interlaced pulse generating circuit, used to generate a first pulse signal according to a first control signal, and to generate a second pulse signal according to a second control signal, the first control signal and the second control signal are anti-phase signals, and the first pulse signal and the second pulse signal are interlaced pulse signals; a delayed signal output circuit, comprising G signal output circuits, G being an integer greater than or equal to 2; non-first-stage signal output circuits all receive the delayed output signal output by the previous-stage signal output circuit as the input signal of the current-stage signal output circuit, and the first-stage signal output circuit receives the initial input signal as the input signal of the first-stage signal output circuit; the embodiment of the present invention generates a first pulse signal and a second pulse signal with adjustable periods, and generates a delay signal with controllable delay according to the first pulse signal and the second pulse signal, and the circuit layout area is small and the power consumption of the circuit is low.

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.