45 results about "Pulse circuits" patented technology

This invention relates to the field of pulse circuit technology and discloses a high-efficiency AC power line zero-crossing detection chip, including a path selection module, a signal processing module, and a driving module. The path selection module switches the charging circuit according to the potential of the internal power supply capacitor. The signal processing module uses a feedback loop to adjust the switching level of the sampling branch and generate a zero-crossing trigger pulse signal. The driving module responds to the zero-crossing trigger pulse signal by segmentally turning on the internal power supply capacitor and the external energy supply capacitor in the initial and subsequent stages of the zero-crossing point. This invention solves the contradiction between the ultra-high input impedance sampling environment and the driving strength through a controlled hysteresis window and a segmented current injection mechanism, suppresses signal jitter, improves the timing accuracy of zero-crossing detection, and effectively reduces the static power consumption of the system.

The invention relates to the field of pulse circuit and input and output interface control, in particular to a printer USB (Universal Serial Bus) insertion detection method and equipment based on a dual delay mechanism. The method comprises the following steps: performing term registration and dual delay window arrangement by acquiring signals such as a USB insertion trigger level, and constructing a configurable sequential relationship; executing charging and discharging sequence starting and delay endurance processing, and generating an ordered expiration mark sequence; sampling for the first time and sampling for the second time based on the sequence, and constructing a judgment result through consistency comparison; and finally, completing power supply latching, enumeration configuration and state filing according to a judgment result. According to the invention, the anti-interference capability and reliability of insertion detection are effectively improved, and structured management and full-link auditing in the detection process are realized.

This invention relates to the field of voltage regulator circuit technology, specifically disclosing a thyristor gate trigger circuit, including AC input terminals Uin1 and Uin2, sampling input terminals Uin3 and Uin4, AC output terminals Uout1 and Uout2, operational amplifiers N1 and N2, a rectifier-filter voltage regulator circuit, a current-limiting pulse circuit, a synchronization signal phase-shifting circuit for adjusting the phase angle of the output pulse signal, and a phase-shifting trigger circuit. The AC input terminals Uin1 and Uin2 are synchronization signals. This invention acquires the voltage value at the output terminal of the thyristor voltage regulator circuit in real time, and adjusts the phase of the output pulse to the thyristor gate according to the magnitude of the sampled voltage value. The thyristor adapts to the phase angle of the trigger pulse, thereby achieving voltage regulation in the thyristor voltage regulator circuit. This embodiment of the thyristor gate trigger circuit has the technical effects of high pulse sensitivity and strong stability.

This invention belongs to the field of power semiconductor technology and relates to an MCT series pulse circuit. This invention employs a MOS-controlled thyristor with a cathode short-circuit structure, combining the simplicity of the MOSFET gate control circuit with the excellent surge current capability of the thyristor to provide high di / dt and high peak current. This invention uses a standard 1700V MCT device in series, combined with a voltage equalization circuit, to achieve static withstand voltage and dynamic voltage balance during MCT turn-on in an ultra-high voltage capacitive pulse circuit. Simultaneously, the drive signal output from the driver chip is transmitted to the MCT gate circuit via magnetic coupling, and then modulated by the MCT gate circuit to achieve synchronous transmission of the drive signal and synchronous conduction of the MCT, reducing the asynchrony of the series MCT turn-on and preventing voltage imbalance caused by inconsistent MCT turn-on, which could damage the device. The MCT series circuit in this invention has high synchronization and high cascading capability, allowing for multi-stage series connection to achieve ultra-high voltage series pulses.

The present application belongs to the technical field of electromagnetic relay detection, and discloses a method and device for testing the anti-interference sensitivity of an electromagnetic relay, which comprises inputting a pulse voltage to the relay coil, monitoring and recording the pulse time value at the instant when the normally closed contact of the relay is separated, and the device comprises a coil power supply, a pulse circuit and a time base timer, the coil power supply comprises a voltage adjustment circuit, the pulse circuit is electrically connected with the time base timer and used for generating a voltage pulse and applying the voltage pulse to the input end of the relay coil, and the time base timer comprises a single-chip microcomputer and a high-frequency clock circuit electrically connected with the single-chip microcomputer and used for generating a voltage pulse to drive the relay coil, when the electromagnetic relay is attracted, the single-chip microcomputer monitors the pulse time value at the instant when the normally closed contact JC is separated. The present application can obtain the voltage value and the duration of the electromagnetic relay without malfunction after the relay is connected with an interference signal, and can provide quantitative parameter guarantee for producing high-quality electromagnetic relay products.

The invention discloses a trigger pulse circuit and system, and relates to the field of measurement, and a time-delay controllable trigger circuit arranged in the trigger pulse circuit can convert a received CMOS level trigger signal into a CMOS level trigger pulse signal which can be recognized by a neutron generator high-voltage circuit when a first preset time after power-on is reached. And the neutron generator high-voltage circuit generates a neutron targeting pulse signal after receiving the CMOS level trigger pulse signal and transmits the neutron targeting pulse signal to the neutron tube, so that the neutron targeting operation can be carried out only when the storage type logging instrument is electrified for a first preset time. Neutron targeting caused by abnormal work of the storage type PNN logging instrument on the ground can be prevented, personal injury is completely eradicated, and the safety of the scheme is improved.

This invention provides a pulse detection system and method. The pulse detection system includes a laser module for emitting laser light, comprising a laser and at least one switch; an average power detection module for detecting the average voltage of multiple pulses and generating a first detection result; a peak power detection module for detecting the peak voltage of a single pulse and generating a second detection result; a control module for processing data based on the first and second detection results and outputting a corresponding signal, which controls the on / off state of the switch; and a power supply module for providing electrical energy for the system's operation. This invention enables simultaneous detection of the peak power and average power of a pulse circuit, improving the safety of the pulse detection system.

The present invention relates to the technical field of wireless communications. Disclosed in the present invention is a power amplifier. The power amplifier comprises a signal input end, a radio frequency amplifier and a signal output end which are electrically connected in sequence, and an average power tracking circuit. An input end of the average power tracking circuit is used for connecting a power supply and receiving an output signal of an external host computer, an output end of the average power tracking circuit is connected to an input end of a radio frequency amplifier, and the average power tracking circuit is used for converting, on the basis of a received target voltage value, a power supply voltage output by the power supply into a preset voltage to supply power to the radio frequency amplifier. The average power tracking circuit comprises a voltage conversion circuit, a comparator, a loop filter circuit, a PWM modulator, a voltage divider circuit, a pulse circuit, and a first inductor. By switching the characteristics of the loop filter, the present invention enables the power supply to achieve both fast establishment and high-precision output, thereby allowing a working voltage of the amplifier to be as low as possible, and further reducing power consumption of the power amplifier.

The application provides a pressure wave balloon catheter, which comprises a catheter, a balloon, a first conductor, a second conductor and a wire; the balloon is arranged at the front end of the catheter, the balloon and the peripheral wall of the catheter form a closed space, and the balloon is extended into the inside of blood vessel tissue under the driving of the catheter; the peripheral wall of the catheter is inwardly recessed to form a mounting groove; or the first conductor is coated on the peripheral wall of the catheter, the first conductor and the second conductor are connected in series on a pulse circuit through the wire, the first conductor is coated on the bottom wall of the mounting groove, the second conductor is arranged on one side of the first conductor, a communication channel is arranged between the first conductor and the second conductor, and the communication channel is used for connecting the first conductor and the second conductor and forming an electrode; and the electrode is used for generating a pressure wave in the balloon under a pulse voltage. According to the pressure wave balloon catheter provided by the application, the cross-sectional size of the balloon catheter can be reduced, and the passing property of the balloon in the blood vessel tissue can be effectively improved.

The invention discloses an electromagnetic interference high-voltage pulse circuit, a control method, electronic equipment and a storage medium. The electromagnetic interference high-voltage pulse circuit comprises a first self-oscillation circuit, a first pulse width modulation circuit, a first follower circuit, a transformer control and output circuit, a second self-oscillation circuit, a second pulse width modulation circuit, a second follower circuit and a relay control circuit; the transformer control and output circuit uses a first follower circuit to output a signal to control the input of a transformer primary coil so as to control the output of a transformer secondary coil; and the relay control circuit uses the second follower circuit to output a signal to control the actuation of a relay so as to realize the output control of the final signal pulse train. According to the electromagnetic interference high-voltage pulse circuit, the control method, the electronic equipment and the storage medium provided by the invention, the circuit structure is simple, the size is small, the cost can be reduced, the controllability is high, and output modulation is facilitated.

The invention discloses a pulse circuit, and relates to the technical field of electronics, the pulse circuit comprises a boost circuit, the boost circuit comprises a boost control circuit, a first diode and a first capacitor, the first end of the boost control circuit is connected with one end of the first capacitor, and the other end of the first capacitor is connected with the negative electrode of the first diode; the anode of the first diode is connected with a first power supply; a first end of the signal amplification circuit is connected with a negative electrode of the first diode and the other end of the first capacitor; the second end of the signal amplification circuit is connected with and controls the on-off of the pull-up switch, the first end of the pull-up switch is connected with a second power supply, the first end of the pull-down switch is grounded, and the second end of the pull-up switch is connected with the second end of the pull-down switch so as to cooperate to output pulse signals; and the main control chip is respectively connected with and controls the boost control circuit, the signal amplification circuit and the pull-down switch. The diode and the capacitor are used for boosting, and the production and manufacturing cost is low.

This invention provides an intermittent high-voltage pulse control method, a pulse circuit, and an acoustic pressure therapy device. The control method includes: obtaining a charging cycle based on an operating frequency of the piezoelectric ceramic plate, where the charging cycle is longer than operating time Et of the pulse signal in the pulse generation circuit; issuing a charging command at the beginning of each charging cycle to trigger the pulse generation circuit to enter a charging state, and after charging is completed, performing discharging to release a stored energy voltage to the piezoelectric ceramic plate to complete output of the pulse signal within the current charging cycle; and after outputting the pulse signal within the current charging cycle, issuing a sleep command to stop the operation of the pulse generation circuit until a next charging cycle begins, and then issuing the charging command again to trigger the pulse generation circuit.

The invention relates to the technical field of image intensifiers, and particularly discloses an audio noise suppression device and method for an automatic gating type image intensifier, and the device comprises a voltage stabilization power supply circuit module, a microprocessor, a low-voltage pulse circuit module, a gating gate circuit module, and a cathode output circuit module. The input end of the voltage-stabilizing power supply circuit module is connected with a 2-4VDC power supply, and the output end of the voltage-stabilizing power supply circuit module outputs 3.3 VDC power supply voltage and is connected with a power supply input pin and a grounding pin of the microprocessor; a PWM output pin of the microprocessor is connected with an input signal end of the low-voltage pulse circuit module; the signal output end of the low-voltage pulse circuit module is connected with the control input end of the gating gate circuit module; the high-voltage power supply input end of the gating gate circuit module is connected with high-voltage alternating current, and the high-voltage pulse signal output end of the gating gate circuit module is connected with the input end of the cathode output circuit module; and the output end of the cathode output circuit module is connected with the photoelectric cathode of the image intensifier single tube.

The invention relates to the technical field of high-voltage pulses, and discloses a modular high-reliability high-voltage pulse circuit, which comprises a direct-current power supply used for providing direct-current input electric energy for the whole high-voltage pulse circuit; the boosting unit is used for converting the direct-current input electric energy into high-voltage pulse energy through a pulse modulation technology; the fault bypass protection unit is used for automatically bypassing the fault part when the high-voltage pulse circuit breaks down, so that the high-voltage pulse circuit operates normally; the load is used for receiving and utilizing the high-voltage pulse energy output by the high-voltage pulse circuit; and the central digital control module is used for communicating with an upper computer and monitoring and controlling the boosting unit so as to realize output of different high-voltage pulse sequences. The operation reliability of the system is greatly enhanced.

The invention provides a grid bias voltage circuit for a transmission tube in a bidirectional level conversion circuit. The grid bias voltage circuit comprises a first phase inverter, a second phase inverter, a third P-type field effect transistor and a monostable pulse circuit, the first inverter is connected to the first power domain and the enable signal; the second inverter is connected to the second power domain and the enable signal; the source electrode of the third P-type field effect transistor is connected to the output nodes of the first inverter and the second inverter, the grid electrode is connected to the first power domain, and the drain electrode is grounded; the monostable pulse circuit is connected to the enable signal and the second power domain; wherein the output node provides grid bias voltage and is used for controlling an N-type field effect transistor transmission tube in the bidirectional level conversion circuit. The three parallel current branches are designed to charge the grid bias voltage at the same time, and the stable grid bias voltage can be quickly established within an extremely short time after the chip is powered on and enabled, so that the bidirectional level conversion circuit is supported to carry out high-speed signal transmission.

The invention provides a broadband phased array ground penetrating radar transmitter and a control method thereof, and relates to the technical field of phased array radar detection, and the broadband phased array ground penetrating radar transmitter comprises a control module, a TDC-based time difference measurement unit, a programmable microstrip line-based pulse shaping unit, a DDS module, a driving module and a Marx pulse circuit. The control module is used for parameter analysis and signal acquisition, reading waveform and delay parameters stored in the waveform memory, and issuing the waveform and delay parameters to the DDS module to generate trigger signals of each channel; the time difference measuring unit based on the TDC measures the inherent trigger time difference between the channels, and feeds back the inherent trigger time difference to the control module for parameter correction; the driving module receives the trigger signal and triggers and excites the Marx pulse circuit to generate a Gaussian pulse with extremely low time jitter; the pulse shaping unit based on the programmable microstrip line is used for shaping Gaussian pulses into monocyclic pulses, high time precision control and high peak power output of a transmitter are achieved, and the high-resolution phased array ground penetrating radar transmitter is suitable for a high-resolution phased array ground penetrating radar system.

The application discloses a kind of dielectric ceramic and its preparation method and application.The dielectric ceramic of the application includes the following mass percentage of components: Bi2O3: 8.3%~17.4%;CaO: 5.5%~14.9%;SrO: 20.6%~34.6%;ZrO2: 24.6%~32.8%;TiO2: 17.9%~25.6%.The preparation method of the dielectric ceramic of the application includes the following steps: 1) preparation intermediate powder;2) intermediate powder is mixed according to stoichiometric ratio, ball milling, drying, then adding binder to granulation, then performing die forming and sintering.The dielectric ceramic of the application has the advantages of large dielectric constant, small dielectric loss, small dielectric constant temperature coefficient, etc., and its preparation process is simple, raw material is low in price, environment-friendly, can be applied in pulse circuit, power conversion, wireless charging and other fields, and has broad application prospect.

The invention discloses a precise pulse constant-current device for electrochemical surface treatment of a micron-scale material, and belongs to the technical field of electrochemical equipment. By arranging the power supply system, the electrolyte system and the control system, the control system controls the power supply system to perform electrochemical operation on a to-be-treated workpiece in the electrolyte system; wherein the power supply system comprises an electrolyte heating system, an electrolyte circulating system and a constant-current pulse circuit; the electrolyte heating system is used for heating the electrolyte in the electrolyte system according to the heating control instruction; and the constant-current pulse circuit is used for controlling the constant-current source chip to generate constant current to act on the workpiece to be processed according to the PWM signal of the control system. The constant-current pulse circuit is provided with a gate drive protection branch circuit, so that clutter current can be quickly discharged, and the stability of a signal reference is guaranteed; and the influence of electromagnetic interference and power supply fluctuation on the driving signal is avoided.

The invention relates to a working state indicating circuit for an X-ray fluorescence spectrometer, and relates to the technical field of internal circuits of spectrometers, the working state indicating circuit comprises a decimal counter chip U1, a pulse generating circuit and a plurality of groups of indicating lamp circuits; the pulse generation circuit comprises an instrument control circuit and a timing pulse circuit; the output end of the instrument control circuit is connected with the input end of the timing pulse circuit; the output end of the timing pulse circuit is connected with the fourteenth pin of the decimal counter chip U1; the first pin to the seventh pin and the ninth pin to the eleventh pin of the decimal counter chip are respectively connected with the input ends of a group of indicating lamp circuits; the fifteenth pin is connected with one end of a resistor R11, and the other end of the resistor R11 is connected with the input end of the last group of indicating lamp circuit; through a dynamic indication circuit constructed by a 4017BT decimal counter and a 555 timer, the instrument test process is refined into a visual cycle of ten stages, and the test progress is visually reflected.

A system for protecting a MEMS relay switch system that controls electric current to a load includes a parallel resonant circuit in series with the MEMS relay switch system. The parallel resonant circuit includes an auxiliary switch in series with a capacitor configured to be pre-charged by a voltage source, and an inductor in parallel with the auxiliary switch and the capacitor. The inductor is in series with the MEMS relay switch system. A method includes receiving a signal, activating an auxiliary switch, determining if the received signal is a turn OFF or a turn ON signal, and depending on the received signal, setting a time delay within a resonant half cycle of a parallel resonant pulse circuit, turning off the auxiliary switch, and pre-charging a capacitor of the parallel resonant pulse circuit.

This invention relates to a short-pulse loop induced voltage superimposed device and its assembly method; it solves the problems of long pulse loops and large inductance in existing induced voltage superimposed devices; it includes an induced voltage superimposed device body, which comprises a secondary magnetically insulated transmission line, a first-stage induction cavity, a secondary supporting vacuum cavity, and a ring-shaped short-circuit connecting piece; the secondary magnetically insulated transmission line includes a pulse superimposed section and a cantilever supporting section inner cylinder connected together, the first-stage induction cavity being sleeved outside the pulse superimposed section; the secondary supporting vacuum cavity being sleeved outside the cantilever supporting section inner cylinder, with one side connected to the cantilever supporting section inner cylinder and the other side connected to the first-stage induction cavity; the short-circuit connecting piece is made of conductive material; the short-circuit connecting piece is sleeved outside the pulse superimposed section, located within the gap, and its inner and outer sides are respectively attached to the outer wall of the pulse superimposed section and the inner wall of the first-stage induction cavity; this invention also proposes an assembly method for the above device.

The present disclosure provides a broadband phased array ground penetrating radar transmitter and a control method thereof, and relates to the technical field of phased array radar detection, which comprises a control module, a time difference measurement unit based on TDC, a pulse shaping unit based on programmable microstrip line, a DDS module, a driving module and a Marx pulse circuit; the control module is used for parameter analysis and signal acquisition, and reads the waveforms and delay parameters stored in the waveform memory and sends them to the DDS module to generate trigger signals of each channel; the time difference measurement unit based on TDC measures the inherent trigger time difference between channels and feeds back to the control module for parameter correction; the driving module receives the trigger signal and triggers the Marx pulse circuit to generate a Gaussian pulse with extremely low time jitter; the pulse shaping unit based on programmable microstrip line is used to shape the Gaussian pulse into a single-period pulse, and the present disclosure realizes high time precision control and high peak power output of the transmitter, and is suitable for high-resolution phased array ground penetrating radar systems.

The application relates to a dual-mode tissue ablation device, which comprises a first pulse circuit configured to generate and output a first pulse signal; a second pulse circuit configured to generate and output a second pulse signal; a waveform conversion circuit connected with the second pulse circuit and configured to output a high-frequency resonance signal based on the second pulse signal; a signal switching circuit connected with the first pulse circuit and the waveform conversion circuit and configured to select the first pulse signal or the high-frequency resonance signal for output; and an output electrode configured to apply the signal output by the signal switching circuit to target tissue. By switching between the first pulse signal and the high-frequency resonance signal through the signal switching circuit and outputting the signal to the target tissue through the output electrode, switching between irreversible perforation ablation and radio frequency ablation can be realized, the two ablation modes can be synergized, and the influence of the heat sink effect on tissue ablation can be reduced.

The present disclosure relates to device tracking. Described is an improved passive marker device (10). The passive marker device (10) comprises a coil element (12), a mechanical resonator (14), and a circuit element (16). The coil element is coupled to the mechanical resonator for producing a response signal having an operating frequency corresponding a mechanical resonating frequency of the mechanical resonator and a signal decay having a decay time constant in response to an excitation pulse, wherein the excitation pulse is a magnetic or electromagnetic excitation pulse. The circuit element is configured to limit a power transferred to the mechanical resonator when the at least one excitation pulse has an excitation amplitude equal to or greater than a threshold value.

The utility model discloses a current-voltage conversion circuit structure for electroporation delivery. The current-voltage conversion circuit structure comprises a current-to-voltage conversion circuit and a voltage-to-pulse conversion circuit. The current-to-voltage circuit converts current signals into voltage through an input signal processing module, high-precision amplification is achieved through an operational amplifier and a feedback network of a signal amplification module, the driving capacity is enhanced through a transistor cascade circuit, and temperature drift is dynamically compensated in combination with a thermistor. The voltage-to-pulse circuit corrects non-linear errors through a resistance network of the linearization processing module, achieves gain adjustment through an operational amplifier and an adjustable resistor, and finally adapts to load changes through a field effect transistor and a negative feedback network. The circuit realizes high conversion precision, wide temperature range stability and load adaptive capability, and is suitable for high-precision scenes such as medical treatment or beauty electroporation, industrial sensing and the like.

The invention provides a phase-locked loop locking detection circuit, a phase-locked loop locking detection method, a chip and electronic equipment. The phase-locked loop locking detection circuit comprises a phase frequency detection circuit, a first OR gate, an anti-spike pulse circuit and a counting zero clearing circuit, the phase frequency detection circuit generates a first phase signal and a second phase signal according to the logic high level signal, the reference clock signal and the feedback clock signal; the first OR gate performs OR operation on the first phase signal and the second phase signal to obtain a first trigger signal; the anti-spike pulse circuit shortens the pulse width of the first trigger signal according to a preset threshold to obtain a second trigger signal; the counting zero clearing circuit performs resetting zero clearing when the second trigger signal has a pulse, the output locking indication signal is in a low level and represents that the phase-locked loop is in a lock losing state, and when the second trigger signal does not have a pulse, the counting zero clearing circuit performs delay according to the feedback clock signal and the control logic high level signal, and the output locking indication signal is in a high level and represents that the phase-locked loop is in a lock losing state. And representing that the phase-locked loop is in a locked state. Therefore, whether the phase-locked loop is in a locked state is detected.

The invention discloses a synchronizing signal generating circuit and a synchronizing signal generating method. The synchronizing signal generating circuit comprises a first counting circuit, a trigger circuit and a pulse circuit, wherein the first counting circuit receives serial data and counts rising edges and / or falling edges of the serial data to generate counting signals. The trigger circuit receives the counting signal and generates a trigger signal according to the counting signal, when the counting signal is larger than or equal to a first threshold value, the trigger signal jumps from the first state to the second state, and the first threshold value is a natural number from 2 to 21. The pulse circuit is used for receiving the trigger signal and generating a synchronizing signal according to the trigger signal, and when the trigger signal jumps from the first state to the second state, the synchronizing signal jumps from the first state to the second state and jumps to the first state after being kept in the second state for a preset duration. The synchronous signal generation circuit can quickly and accurately generate the synchronous signal, and ensures the reliability of serial data transmission.

The invention discloses an MCU pulse heating control method and system, and belongs to the technical field of new energy automobiles, and the method comprises the steps: sending a pulse heating instruction when a preset pulse heating condition is judged to be met based on current temperature data, current electric quantity data and system working data; executing a pulse heating action based on the pulse heating instruction; acquiring high-frequency positive and negative pulse signals based on the pulse heating instruction to realize pulse heating; based on a preset dynamic pulse adjustment strategy, the pulse circuit data and the pulse temperature data, pulse adjustment parameters are obtained to execute a dynamic pulse heating action; when it is judged that the preset pulse temperature threshold value is met based on the pulse temperature data, the pulse heating action is terminated based on the termination pulse signal. According to the MCU pulse heating control method and system provided by the invention, the technical problems of non-uniform heating, high cost and the like in the prior art can be solved, and efficient temperature rise in the battery and improvement of controllability of heating efficiency are realized.

The utility model discloses a lithium ion battery of lithium iron phosphate with power consumption early warning function, including battery group, low frequency pulse circuit, control circuit, sampling circuit, low power early warning circuit, low frequency pulse circuit is used to produce low frequency pulse signal, control circuit is used to according to low frequency pulse signal control the working condition of sampling circuit, sampling circuit is used to the power of battery group is sampled, low power early warning circuit is used to send early warning signal when the battery power that sampling circuit acquires is lower than the preset threshold value. Its remarkable effect is: not only realizes intermittent flashing display remaining power, and the display mode is easier to cause the attention of user, and the battery power indication circuit indication effect is better, still effectively reduced the power consumption of power consumption early warning module.