98 results about "Pulse circuits" patented technology

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

The invention discloses a current-to-voltage conversion circuit structure for electroporation delivery. The current-to-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 belongs to the technical field of power electronics and semiconductor devices, and provides a transistor on-resistance high-precision comparison method, which comprises the following steps of: generating and outputting a direct-current voltage # imgabs0 # which can quickly adjust a numerical value and has load capacity through a direct-current voltage adjusting module; the grid driving module generates and outputs a pulse signal # imgabs3 # of which the voltage can be quickly adjusted based on the direct-current voltage # imgabs1 # and the pulse voltage # imgabs2 #; applying a pulse signal # imgabs4 # to the transistor to be measured through the power module, and measuring the on-resistance of the transistor to be measured under the gate driving voltage; and switching the gate driving voltage in the microsecond-to-nanosecond magnitude delay, and measuring the on-resistance of the transistor to be measured under the switching gate driving voltage based on the pulse signal # imgabs5 #. According to the method, the on-resistance of the transistor to be tested under different gate driving voltages can be tested in the pulse circuit, the measurement delay is shortened to several nanoseconds from several minutes of a traditional double-pulse circuit, and the performance of the transistor reliability evaluation circuit is effectively improved.

The invention describes a driver circuit for supplying a constant current to an LED arrangement (LED1... LEDN) formed by a buck converter comprising a current measurement resistor (Rsense) in series with a coil (Lbk) that measures the current through the coil (Lbk). A two-point control circuit turns on or off the first switching element (Qh) as a function of a measured current (Vsense) flowing through the coil (Lbk) in order to keep the average current flowing through the LED arrangement (LED1... LEDN) constant. A current amplifier circuit (A sense) is connected to a current measurement resistor (R sense) to detect a current (V sense) flowing through the current measurement resistor, and positive and negative currents can be measured by superimposing an offset voltage (V offset) applied to one of its inputs by an offset voltage source. An output terminal of the current amplifier circuit is connected to an input terminal of the two-point control circuit. The offset voltage (V offset) is also superimposed on its threshold voltage (V peak, V valley). Furthermore, a start-up pulse circuit (Vstart-up) is provided, which is connected to the control input of the first switching element (Qhs) via a diode (Dstart-up).

The utility model discloses an active clamping forward switching power supply with dead zone control. The active clamping forward switching power supply comprises a minimum pulse circuit, a dead zone setting circuit, a signal interlocking circuit and an active clamping forward switching circuit, the minimum pulse circuit, the dead zone setting circuit and the signal interlocking circuit are connected in sequence; the active clamping forward switching circuit comprises a transformer T1, the two ends of a primary side winding of the transformer T1 are connected with a clamping absorption circuit in parallel, a primary side negative electrode of the transformer is connected with a main power circuit, and the clamping absorption circuit and the main power circuit are connected with a signal interlocking circuit. The circuit can flexibly set dead time to avoid circuit failure caused by direct connection of a clamping tube and a main power switch tube, input signal burrs can be eliminated, mistaken switching-on caused by the signal burrs can be avoided, one path of PWM can be converted into two paths of PWM output, and the number of external equipment is reduced.

The invention discloses a high-voltage pulse generation circuit based on a front boost structure, a working method and application, and belongs to the field of high-voltage pulse power supplies, the high-voltage pulse generation circuit comprises a direct-current power supply, a front Sepic boost circuit and a pulse forming module which are connected in sequence, and the pulse forming module comprises a plurality of cascaded Marx high-voltage pulse circuits. Therefore, the direct-current power supply is boosted by the aid of the front Sepic booster circuit, boosted electric energy is transmitted to the pulse forming module, and high-voltage pulses are formed on a load by the aid of parallel charge pump voltage and series discharge of the Marx high-voltage pulse circuit. By adopting the high-voltage pulse generation circuit based on the pre-boost structure, the working method and the application, a traditional Marx circuit is optimized through the Sepic boost converter, the voltage gain is improved, the number and cost of devices are reduced, the voltage stress of the devices is reduced, the system efficiency is improved, the power density is increased, the reliability is improved, and the service life of the circuit is prolonged.

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 discloses a high-voltage electric pulse synergistic acidizing fracturing coal seam anti-reflection device and method.The high-voltage electric pulse synergistic acidizing fracturing coal seam anti-reflection device comprises a hole packer, the hole packer comprises a high-pressure acid injection pipeline, the middle of the high-pressure acid injection pipeline is sleeved with an expansion capsule, the two ends of the expansion capsule are each provided with a fixing end, and a connecting pipe is arranged at the rear end of the high-pressure acid injection pipeline; each high-voltage electrode comprises a high-voltage electrode A section and a high-voltage electrode B section, mounting holes are formed in the two sides of the fixed end at the front end in the radial direction, springs are fixedly arranged at the bottoms in the mounting holes, the two high-voltage electrode A sections penetrate through the expansion capsule, and the front ends of the two high-voltage electrode A sections abut against the high-voltage electrode B sections to achieve electric connection. And the rear end of the high-voltage electrode section A is connected with the pulse circuit. Mineral substances can be corroded through the acidizing fracturing fluid, a coal seam hole fracture network can be dredged, the subsequent high-voltage electric pulse discharging difficulty is reduced, then high-voltage electric pulse discharging is carried out for fracturing, and the coal rock fracturing efficiency is guaranteed.

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.

Disclosed are a drive circuit, a light-emitting circuit and a display device. The drive circuit is connected to a load element. The drive circuit includes a switch power supply circuit for boosting or reducing a first voltage; a feedback circuit for receiving a feedback voltage of the load element, and generating a control signal in response that the feedback voltage is not within a preset voltage range; a pulse circuit for generating a switch signal with a first preset frequency; and a switch circuit. The switch circuit is for transmitting the control signal to the control end of the switch tube in response to receiving the control signal, and the switch circuit is for transmitting the switch signal to the control end of the switch tube in response to not receiving the control signal.

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 relates to the field of high-resolution time measurement systems and integrated circuit technology, providing a time measurement circuit with a two-dimensional address-modulated TOT pulse, comprising: a common-gate transimpedance amplifier, a high-speed high-gain comparator, a current-mode logic output stage, a common-mode feedback threshold setting circuit, and a two-dimensional address-modulated TOT pulse circuit; the address modulation pulse circuit includes an address modulation pulse width circuit and an address modulation pulse amplitude circuit, wherein the address modulation pulse width circuit includes: multiple sets of first modulation units, multiple sets of second modulation units, multiple inverters, and multiple bits of first digital code; the address modulation pulse amplitude circuit includes: multiple sets of third modulation units and multiple bits of second digital code. This invention allows a single TOT signal to simultaneously carry time information, energy information, and address information, reducing wiring, improving reliability, and increasing integration density.

The invention belongs to the technical field of pulse power, and particularly discloses a frequency superposition pulse circuit based on an avalanche transistor, a generator and a control method. According to the frequency superposition pulse circuit, the frequency superposition pulse circuit is composed of the multiple pulse units, the finally output repetition frequency pulse is composed of the outputs of the multiple pulse units, superposition on the frequency is achieved, and the pulse repetition frequency can be improved while the pulse amplitude can be effectively guaranteed. The pulse repetition frequency of a single pulse unit can be effectively reduced while the purpose of high repetition frequency output is achieved, the problem that the repetition frequency of output pulses of a single Marx circuit based on an avalanche transistor is insufficient is solved, meanwhile, the problem that the avalanche transistor and a resistor in the single pulse unit generate heat under high repetition frequency pulses can be effectively relieved, and the pulse repetition frequency of the single pulse unit can be effectively reduced. And thermal damage of the device under high repetition frequency pulses is avoided. The n isolation diodes in the same pulse unit are connected in series, so that the output end of the whole pulse unit generates high voltage, an isolation effect is achieved, and false triggering of m pulse units is avoided.

The invention discloses a pulse circuit for a distributed optical fiber temperature measurement laser device and a temperature measurement device, the pulse circuit is provided with a power supply unit, a central processing unit and a pulse signal output unit, the device is provided with a machine frame, and a bottom plate is arranged in the machine frame. The bottom plate is provided with an integrated circuit board comprising a power supply unit, a central processing unit and a pulse signal output unit, a beam combiner is arranged beside the integrated circuit board, the beam combiner is connected with a coaxial refrigeration laser placed on a circuit board, a shell of the machine frame is provided with a front panel, the front panel is provided with a power supply interface, a communication COM port, an NTC interface, an SMA interface and an optical fiber outlet, and the power supply interface is connected with the central processing unit. The optical fiber outlet is communicated with the beam combiner, and the bottom plate and the shell are integrally manufactured. The circuit is applied to a distributed optical fiber temperature measurement laser device, and can solve the problems that a common distributed optical fiber temperature measurement laser device is not long enough in measurement distance, large in power consumption and not resistant to electromagnetic interference.

This invention belongs to the field of power electronics and semiconductor device technology, and proposes a high-precision comparison method for transistor on-resistance. The method includes: generating and outputting a DC voltage capable of rapid adjustment and load-bearing capacity via a DC voltage adjustment module; generating and outputting a rapidly adjustable pulse signal based on the DC voltage and a pulse voltage via a gate drive module; applying the pulse signal to the transistor under test (TUT) via a power module and measuring the TUT's on-resistance under the gate drive voltage; switching the gate drive voltage within a delay on the order of microseconds to nanoseconds, and measuring the TUT's on-resistance under the switched gate drive voltage based on the pulse signal. This method can test the on-resistance of TUTs under different gate drive voltages in a pulse circuit, reducing the measurement delay from several minutes in traditional dual-pulse circuits to several nanoseconds, effectively improving the performance of transistor reliability evaluation circuits.

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.

An apparatus has a phase lock loop with an adaptive loop filter that has a reset circuit controlled by a power gating pulse circuit.

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.

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.

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 invention provides a SiC MOSFET short-circuit protection circuit, which comprises a double-pulse circuit and a desaturation short-circuit protection circuit, and is characterized in that a driving chip detects the double-pulse circuit through the desaturation short-circuit protection circuit; whether the device breaks down or not is judged by judging whether the drain-source voltage of the device exceeds the set threshold voltage or not, misoperation of short-circuit protection in the switching process is effectively avoided by designing the blanking time, the charging speed of the blanking capacitor during the short-circuit fault is increased, the blanking time is remarkably shortened, the device can be turned off more quickly, and the SiC MOSFET is protected against damage. The method is especially suitable for SiC MOSFETs with higher short-circuit current and weaker short-circuit endurance capability.

The invention discloses a double-H-bridge high-frequency pulse circuit based on an IGBT (Insulated Gate Bipolar Translator), relates to the field of electronic control, and aims to solve the problem that the circuit reliability is reduced when a conventional IGBT high-frequency high-voltage pulse circuit generates a high-frequency pulse. The double-H-bridge high-frequency pulse circuit based on the IGBT comprises a rectification module, a double-H-bridge high-frequency high-voltage pulse module and a protection module. The double-H-bridge high-frequency high-voltage pulse module comprises two H-bridge circuits which are connected in parallel; one side of the rectification module is connected with a high-voltage AC power supply, and the other side is connected with the double-H-bridge high-frequency high-voltage pulse module. And the protection module is connected with the double-H-bridge high-frequency high-voltage pulse module. Through the design of the double-H-bridge structure, stable high-frequency high-voltage pulses can be obtained, specifically, transient changes of voltage and current can be achieved, and the stability of the circuit is maintained; high-frequency and high-voltage pulses of more than 10KV and 100KHz can be obtained; modular design is achieved, the structure is simple, and installation is convenient.

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 relates to device tracking. An improved passive marker device (10) is described. A passive marker device (10) comprises a coil element (12), a mechanical resonator (14) and a circuit element (16). And a coil element coupled to the mechanical resonator for generating a response signal in response to an excitation pulse, the response signal having an operating frequency corresponding to a mechanical resonant frequency of the mechanical resonator and a signal attenuation having an attenuation time constant, the excitation pulse is a magnetic excitation pulse or an electromagnetic excitation pulse. The circuit element is configured to limit power transmitted to the mechanical resonator when at least one excitation pulse has an excitation amplitude equal to or greater than a threshold.

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.

The utility model discloses a high-frequency electronic descaling decomposition device which comprises a pipe body arranged on the outer side of a pipeline in a sleeving mode, the pipe body is composed of a first semicircular shell and a second semicircular shell, the first semicircular shell and the second semicircular shell comprise connecting ends and butt joint ends, the connecting ends are connected through detachable connecting pieces, and the butt joint ends are connected through detachable connecting pieces. The butt joint ends are connected through a lock catch assembly, the inner side of the first semicircular shell is provided with a first limiting protrusion and a first arc-shaped elastic gasket, the inner side of the second semicircular shell is provided with a second limiting protrusion and a second arc-shaped elastic gasket, and the interior of the pipe body is connected with a high-frequency pulse circuit board. Most of the existing electronic descaling devices are fixed and are in direct contact with a pipeline, so that the pipeline is easily abraded or damaged after long-term use, the pipe body of the electronic descaling device is detachably connected, the electronic descaling device is convenient to disassemble and maintain, an elastic gasket and a limiting bulge are used for preventing the device from being in direct contact with the pipeline, the protection on the pipeline is enhanced, and the adaptability is strong.