37results 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.

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.

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.

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 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.

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.

The utility model relates to the technical field of beauty instruments, and discloses a function multiplexing pulse signal output circuit and a beauty instrument, and the circuit comprises a rectangular pulse signal generation module which is used for generating a rectangular pulse signal; the rectangular pulse signal shaping module is used for converting the rectangular pulse signal into a positive and negative symmetric rectangular pulse signal; the first function control module is used for outputting positive and negative symmetric rectangular pulse signals to the first metal electrode; the second function control module is used for converting the positive and negative symmetrical rectangular pulse signals into sine pulse signals and outputting the sine pulse signals to the second metal electrode; and the control module is used for conducting the rectangular pulse signal generation module, the rectangular pulse signal shaping module and the first function control module to execute a leading-in function, or conducting the rectangular pulse signal generation module, the rectangular pulse signal shaping module and the second function control module to execute a micro-current function. Function multiplexing of the beauty instrument can be realized based on the same circuit, the circuit composition is simplified, and the cost is reduced.

An array (2) for emitting a total HPEM-DS pulse (4) as a sum of HPEM-DS partial pulses (6a-d) comprises individual modules (8a-d) connected in series, each consisting of a spark-gap-free pulse generator (10a-d) for source pulses (12a-d), a spark-gap-free resonator (14a-d) for shaping partial pulses (6a-d) from the source pulses (12a-d), a directional coupler (18a-d) for coupling a measurement signal (20a-d) from the partial pulses (6a-d), and an antenna (22a-d) for radiating the partial pulses (6a-d), each with a trigger input (24a-d) for triggering the pulse generators (10a-d) based on trigger signals (26a-d), and a trigger module (28) to trigger the signals (26a-d) for a total pulse (4) based on to provide the feedback measurement signals (20a-d) in a temporal trigger sequence (30) such that the partial pulses (6a-d) are radiated to each other in a desired temporal transmission sequence (32). In a method for operating the array (2), the trigger module (28) provides the trigger signals (26a-d) for the total pulse (4) based on the feedback measurement signals (20a-d) in the temporal trigger sequence (30) such that the partial pulses (6a-d) are emitted to each other in the desired temporal transmission sequence (32).

The invention presents a system for managing cattle movement through virtual fencing technology. It involves identifying unique areas within new designated zones, directing cattle towards these areas using wearable devices, and updating virtual fencing regions once specific conditions are met. This streamlined approach enhances efficiency in cattle management, reducing manual intervention while maintaining control over their movement, and allowing cattle access to previous areas such as for access to water or shade.

The invention provides a square wave generating device based on a semiconductor switch, which comprises a power supply, a charging resistor, a coaxial cable, a semiconductor type coaxial switch, a load and a control module, and is characterized in that the power supply is connected with the coaxial cable through the charging resistor, the coaxial cable comprises a plurality of coaxial transmission lines, and the coaxial transmission lines are connected through coaxial reed relay switches; the coaxial cable is connected with a load through the semiconductor type coaxial switch, and the control module is electrically connected with the coaxial dry reed relay switch and the semiconductor type coaxial switch. According to the square wave generating device based on the semiconductor switch, the width of the square wave is controlled by controlling the length of the coaxial cable, so that the pulse width of the square wave is adjusted more simply, conveniently, efficiently and accurately; a semiconductor type coaxial switch is arranged, so that the output performance of square-wave pulses is improved, and the requirements of the electromagnetic compatibility field on high-speed and high-voltage signals are met; the structure of the semiconductor type coaxial switch is optimized, electromagnetic interference is effectively blocked, and the stability of the semiconductor type coaxial switch is improved.

A plasma driver for efficiently delivering energy to a plasma when driving arcs or arc-like plasmas through a spark gap is disclosed. A plasma driver may include an energy storage capacitor, a nanosecond pulser stage electrically coupled with the energy storage capacitor, an IPM stage electrically coupled with the nanosecond pulser stage and the energy storage capacitor, a transformer electrically having a primary side and a secondary side, the primary side electrically coupled with the nanosecond pulser stage and the IPM stage, and a device may include an output cable electrically coupled with a secondary side of the transformer.

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 comb spectrum generator and electronic equipment. The comb spectrum generator comprises a bias module, an input matching module and a selection module which are connected in sequence, the selection module is 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 with 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 into 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. The comb spectrum generator provided by the embodiment of the utility model is beneficial to improving the applicability and the use flexibility of the comb spectrum generator.

The application provides a square wave generating device based on a semiconductor switch, which comprises a power supply, a charging resistor, a coaxial cable, a semiconductor coaxial switch, a load and a control module, the power supply is connected with the coaxial cable through the charging resistor, the coaxial cable comprises a plurality of coaxial transmission lines, the coaxial transmission lines are connected through coaxial reed relay switches, the coaxial cable is connected with the load through the semiconductor coaxial switch, and the control module is electrically connected with the coaxial reed relay switches and the semiconductor coaxial switch respectively. The square wave generating device based on the semiconductor switch is used for controlling the length of the coaxial cable to control the width of the square wave, so that the square wave pulse width adjustment is more convenient, efficient and accurate. The semiconductor coaxial switch is arranged to improve the output performance of the square wave pulse and meet the demand of the electromagnetic compatibility field for high-speed and high-voltage signals. The structure of the semiconductor coaxial switch is optimized, electromagnetic interference is effectively blocked, and the stability of the semiconductor coaxial switch is improved.

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.

This application provides a flow switch control system, comprising: an accelerometer, a filter module, a comparator, a proportional-integral circuit, and an output buffer connected in sequence; the accelerometer is used to monitor the voltage signal generated when mud waves pass through a pulser; the filter module is used to remove frequency components below a preset vibration frequency from the voltage signal to obtain a target voltage signal; the comparator is used to convert the target voltage signal into a pulse digital signal based on the relationship between the target voltage signal and a preset reference voltage in the comparator; the proportional-integral circuit is used to obtain a pulse control signal by proportionally amplifying and integrating the digital signal; and the output buffer is used to buffer and isolate the pulse control signal. This ensures the normal operation and precise adjustment of the flow switch.

The invention discloses a square wave impulse current generating device based on switch element cooperative control, and the device is characterized in that in a charging stage, S1 and S2 are conducted, a power supply E charges C0 through the S1, after the C0 is charged to a set voltage, the S1 is turned off, the S2 is turned on, and the C0 charges C1 through a diode D; in the acceleration capacitor discharging stage, S2 and S4 are conducted, C1 discharges to Rs through S4, and a rapid rising edge is formed; in the discharging stage of the constant current circuit, a current signal collected by R3 is converted into a voltage signal, the voltage signal is input into a PID integral feedback loop composed of an operational amplifier, an integral loop resistor R2 and a capacitor Cp, and the grid voltage of an MOSFET is regulated and controlled to ensure that a switch S2 works in a specified saturated working area, so that the drain current is kept constant; in the truncation discharge stage, the S5 is switched on, the main capacitor C0 charges and shunts the C2, and the S2 and the S3 are switched off at the same time to cut off the current; and redundant electric energy on the C2 is consumed by the energy discharge resistor R0. And high-quality and stable large-current square wave signal output is realized.

Bias supplies and bias control methods are disclosed. One method comprises applying, during an ON pulse, a waveform using switching in connection with a DC voltage, removing the DC voltage while circulating current during an OFF pulse, reapplying he DC voltage, in advance of another ON pulse, and initiating the switching after reapplying the DC voltage to reapply the waveform during another ON pulse.

The invention discloses a multi-phase clock generation circuit which comprises a clock edge detection unit, a delay counting unit and a frequency division unit, the clock edge detection unit samples the edge of a first clock through a second clock, when the clock edge detection unit detects the edge of the first clock, a first enable signal is output to the delay counting unit, and when the edge of the first clock is detected, a second enable signal is output to the frequency division unit; an external phase selection signal is input to the delay counting unit, the delay counting unit starts to count the edge of the second clock signal after receiving the first enable signal, and when the count reaches the phase selection signal, a second enable signal is output to the frequency division unit; and the frequency division unit performs frequency division on the second clock according to a set frequency division number so as to output a set clock signal, and the phase selection signal is the phase of the set clock signal. The multi-phase clock generation circuit is simple in structure, the clock needing the phase is generated at a time, the phase of the set clock signal does not need to be adjusted repeatedly, and the precision of the set clock signal phase is improved.

A generator to provide a source waveform, and a controller configured to receive a signal indicative of power reflected to the generator, receive timing information from a bias supply, and provide a report of the impedance based upon the bias waveform information.

The utility model discloses a megahertz-level signal demultiplexer, which relates to the field of various electronic experiments and comprises a power supply module and a plurality of signal transmission channels, and any signal transmission channel comprises a filter circuit and a signal output circuit which are connected with each other. When the signal demultiplexer works, a source signal is input to the signal output circuit through the filter circuit, the filter circuit is used for filtering the source signal, and the signal output circuit is used for outputting an output signal according to the source signal; and the power supply module is used for providing required working voltage for the signal output circuit. According to the utility model, one path of source signal can be simply and conveniently distributed into multiple paths of same output signals for transmission, the distortion degree of the output signals is low, and the transmission frequency can reach the MHz level.

This disclosure describes systems, methods, and apparatuses for an RF switch comprising one or more cells coupled in series between RF terminals. Each cell having a bridge of PIN diodes or three-terminal switches controlled by complementary drivers through a coupled inductor. A bypass inductor can be arranged across each bridge. The RF switch may include compensation capacitors to better achieve equal distribution of voltage over the switches when the RF switch is in the off state.