104results about "Electric pulse generator details" patented technology

Method and waveform generator for generating at least two signals. The signals are generated by separate channels, with each channel having a numerically controlled oscillator and a digital envelope generator, whose outputs are multiplied and fed to a digital-analog converter. The signal from the digital-analog converter is multiplied with the signal from a local oscillator for generating pulses with an up-converted carrier. The phases of the numerically controlled oscillators are changed between pulses in order to adjust the phase of the up-converted carrier. This allows to generate pulses where the up-converted carriers have a defined phase relationship.

The invention discloses a latch, relates to the field of integrated circuit design, and aims to solve the problem that the error rate of circuit output level is relatively high after a plurality of storage nodes of a latch circuit are impacted by particles in the prior art. The latch at least comprises an input module, a clock control module, a storage module and an output module, the first end of an input module is connected with the input end of the latch, and the second end of the input module is connected with the input end of the storage module; the output end of the storage module is connected with the first end of an output module; the second end of the output module is connected with the output end of the latch, and the input end of the clock control module is connected with the clock signal input end; the output end of the clock control module is respectively connected with the input module and the output module; the latch is used for generating an inverse signal of a corresponding level of the target node by using the storage module when particle collision occurs to the target node; therefore, the accuracy of circuit output level after a plurality of storage nodes are impacted by particles at the same time is improved.

The invention discloses a latch, relates to the field of integrated circuit design, and aims to solve the problem that the error rate of circuit output level is relatively high after a plurality of storage nodes of a latch circuit are impacted by particles in the prior art. The latch at least comprises an input module, a clock control module, a storage module and an output module, the first end of an input module is connected with the input end of the latch, and the second end of the input module is connected with the input end of the storage module; the output end of the storage module is connected with the first end of an output module; the second end of the output module is connected with the output end of the latch, and the input end of the clock control module is connected with the clock signal input end; the output end of the clock control module is respectively connected with the input module and the output module; the latch is used for generating an inverse signal of a corresponding level of the target node by using the storage module when particle collision occurs to the target node; therefore, the accuracy of circuit output level after a plurality of storage nodes are impacted by particles at the same time is improved.

The present application relates to a pulse generation circuit, a pulse generator, and a medical device. The pulse generation circuit includes: a control circuit, a high-voltage power supply circuit, a working power supply circuit, a pulse switch circuit, a plurality of photoelectric isolation drive circuits and a plurality of magnetic isolation power supply circuits. According to the present application, isolation between various power switches can be realized by means of the above photoelectric isolation drive circuits and magnetic isolation power supply circuits; moreover, the photoelectric isolation drive circuits have higher response speeds, such that the synchronization rate of the respective power switches can be improved by controlling the power switches according to a switch control signal by means of the photoelectric isolation drive circuits.

The embodiment of the present invention discloses a position pulse generating circuit and a driving method thereof. The main control module receives a level selection control signal transmitted by a host computer, and transmits the level selection control signal to a selection chip. The selection chip selects an output terminal to output an on or off control signal according to a signal received at an input terminal. A switch unit in the selection circuit is turned on or off according to a control signal received at its own control terminal, so that a pulse level selection circuit can select different first external voltage signals, thereby realizing flexible switching of levels of different specifications. The resistance value of the first resistor is positively correlated with the amplitude of a pulse signal formed by a first external voltage signal connected to the first terminal of the corresponding switch unit and a second external voltage signal connected to the second input terminal of an optocoupler isolation circuit. When different switch units in the pulse level selection circuit are turned on, the first resistor in the current limiting circuit can play a good current limiting role, thereby realizing compatibility of levels of different specifications.

The invention discloses a circuit which comprises a logic circuit and a power switch module, and the power switch module comprises a plurality of switches, a voltage detection circuit and a control circuit. Each switch of the plurality of switches comprises a control end, a first end and a second end, the first end is coupled to a supply voltage, and the second end is coupled to the logic circuit; and the plurality of switches comprise a first switch and a plurality of second switches, and the control end of the first switch receives a power supply enabling signal. The voltage detection circuit is used for detecting whether a voltage of the second end of the first switch is higher than a reference voltage so as to generate a detection result. The control circuit is used for generating an output power enable signal to the plurality of second switches according to the detection result.

An electrosurgical unit configured to regulate a RF input signal applied to an electrosurgical device, the electrosurgical unit including a PWM circuit to produce a DC voltage responsive to a control signal; an RF waveform generator configured to generate an RF waveform based at least in part on the DC voltage; a transformer configured to transform the RF waveform to the RF input signal in a forward direction across the isolation barrier and transform a leakage current to a feedback current in a reverse direction across the isolation barrier; and a control circuit configured to generate the control signal based at least in part on the first input signal and the second input signal, the control signal controlling a pulse width modulation of the PWM circuit to produce the RF input signal.

The utility model discloses a pulse power supply with multiple protection functions, which comprises a rectification inverter circuit and a chopper circuit, the rectification inverter circuit inputs power frequency alternating current and outputs controllable direct current, and the chopper circuit inputs controllable direct current and outputs pulse current; the inverter control circuit controls and outputs a pulse width driving signal to the rectification inverter circuit according to the voltage control signal; the multi-protection circuit comprises at least two protection circuits, the output end of each protection circuit is connected with a forward diode and then outputs the voltage control signal, and the duty ratio of the pulse width driving signal is controlled to be zero according to the voltage control signal. The beneficial effects are that multiple protection can be carried out on the pulse power supply, and the multiple protection does not interfere with each other.

A high voltage pulse power delivery system is provided that includes dedicated security features including fault detection and fault management. In addition to a normal communication cable, the pulsed power delivery system can provide remote power through a standard multi-conductor cable without dedicated conduits or isolation. This simplifies the installation of the device, increases the overall deployment speed, and significantly reduces the deployment cost. The pulsed power delivery system is further configured to transmit power through the pulsed current waveform.

The techniques and circuits, described herein, include solutions for compensating for integrator drift. A drift compensation circuit has a first terminal coupled to an output of an integrator, and a second terminal coupled to an input of the integrator. The drift compensation circuit is configured to sense integrator drift at the output of the integrator, and provide a compensation signal to the input of the integrator based on the sensed drift. The input of the integrator may be coupled to an output of an additional integrator. By sensing the integrator drift at the end of the signal chain, and providing the compensation signal earlier in the signal chain, the compensation signal can compensate for integrator drift from multiple integrators in the system.

The invention relates to a pulse output device (3) comprising: a digital pulse generator (4) for outputting at least one pulse (P) triggered by a trigger signal (5), wherein the digital pulse generator (4) has a trigger input (6) for the trigger signal (5) and a clock input (7) for a clock signal (8). The pulse output device (3) also has a clock generator (9) for generating the clock signal (8). The pulse output device (3) is configured to synchronize the clock signal (8) with the trigger signal (5) before the clock signal (8) is applied to the clock input (7) of the digital pulse generator (4) by stopping a clock divider (10) of the pulse output device (3), which is configured to reduce the clock rate of the clock signal (5), and / or the clock generator (9), and restarting the clock divider (10) and / or the clock generator (9) synchronously with the trigger signal (5).The invention also relates to a laser system (1) comprising such a pulse output device (3) and a laser source (2) for generating at least one laser pulse (LP) synchronized with the at least one pulse (P) output by the digital pulse generator (4). The invention also relates to an associated method for outputting at least one pulse (P) triggered by a trigger signal (5) by a digital pulse generator (4).

Some embodiments include a nanosecond pulse generator circuit. In some embodiments, the nanosecond pulse generator circuit may include: a high-voltage power supply; a nanosecond pulse generator electrically coupled to the high-voltage power supply and switching a voltage from the high-voltage power supply at a high frequency; a transformer having a primary side and a secondary side, the nanosecond pulse generator electrically coupled to the primary side of the transformer; and an energy recovery circuit electrically coupled to the secondary side of the transformer. In some embodiments, the energy recovery circuit includes: an inductor electrically coupled to the high-voltage power supply; a crowbar diode arranged in parallel with the secondary side of the transformer; and a second diode disposed in series with the inductor and arranged to conduct current from a load to the high-voltage power supply.

A semiconductor switch drive circuit includes: a first capacitor to be charged by a drive power source and to generate a positive voltage that sets a semiconductor switch to an ON state, a second capacitor to be charged by the drive power source, a third capacitor to be charged by the second capacitor and to generate a negative voltage that sets the semiconductor switch to an OFF state, and connection switching circuitry that alternately switches between a first connection state in which a control terminal of the semiconductor switch is supplied with the positive voltage, and a second connection state in which the control terminal is supplied with the negative voltage. A transfer restricting circuitry that is electrically connected to the positive terminal of the first capacitor causes the positive voltage output from the first capacitor, to be supplied to the control terminal of the semiconductor switch.

Methods, apparatus, systems, and articles of manufacture to correct non-linearity in a transmitter are described. An example system includes: an input stage (202); a driver (204), an input terminal of the driver (204) being coupled to an output terminal of the input stage (202); an output buffer (208), an input terminal of the output buffer (208) being coupled to an output terminal of the driver (204), an output terminal of the output buffer (208) being coupled to a first input terminal of the input stage (202) via a resistor (212); and a non-linear correction circuitry (218) having an input terminal and an output terminal, the input terminal of the non-linear correction circuitry (218) being coupled to the output terminal of the output buffer (208) and the first input terminal of the input stage (202) via the resistor (212), the output terminal of the non-linearity correction circuitry (218) is coupled to the output terminal of the input stage (202) and the input terminal of the driver (204).

Methods, apparatus, systems, and articles of manufacture are described to correct non-linearity in transmitters. An example system includes an input stage, a driver, an input terminal of the driver coupled to an output terminal of the input stage; an output buffer, an input terminal of the output buffer coupled to an output terminal of the driver, an output terminal of the output terminal coupled to a first input terminal of the input stage via a resistor; and non-linear correction circuitry having an input terminal and an output terminal, the input terminal of the non-linear correction circuitry coupled to the output terminal of the output buffer and the first input terminal of the input stage via the resistor, the output terminal of the non-linear correction circuitry coupled to the output terminal of the input stage and the input terminal of the driver.

A power management integrated circuit (PMIC) and method of operating a PMIC is described. The PMIC is configured to be coupled to a system on chip (SoC) including a number of power and clock domains. Each of the PMIC and the SoC have a shared key. The PMIC is configured to generate a challenge, output the challenge to the SoC and generate an expected-challenge-response determined from the challenge and the shared key. The PMIC is further configured to receive a challenge-response from the SoC and compare the challenge response with the expected-challenge-response. If the challenge response is different to the expected response, the PMIC may (i) apply a reset to the SoC, (ii) supply power to a subset of the SoC power domains and / or (iii) enable clocks of a subset of SoC clock domains.

The utility model discloses an electric pulse output circuit and a massage device. Wherein the electric pulse output circuit comprises a voltage access circuit, a high voltage generation circuit and a plurality of massage electrode circuits; the voltage access circuit is connected with an external voltage source so as to obtain power supply voltage from the external voltage source, the voltage access circuit is further connected with the high voltage generation circuit, and the high voltage generation circuit obtains the power supply voltage from the external voltage source through the voltage access circuit; the high-voltage generation circuit is connected with each massage electrode circuit and is used for boosting the power supply voltage to obtain boosted voltage and sending the boosted voltage to each massage electrode circuit; a switch circuit of the massage electrode circuit is periodically in a switch-on state or a switch-off state, when the switch circuit is switched on, the massage electrode circuit outputs boost voltage, and when the switch circuit is switched off, the massage electrode circuit stops outputting the boost voltage. According to the technical scheme disclosed by the utility model, the massage effect of the electric pulse can be improved.

A transmitter employs simple inverters to predrive cascode-connected pull-up and pull-down output stages. Each output stage includes a drive transistor with a thin gate dielectric for fast switching. The drive transistor is cascode connected to a set of parallel-connected transistors. Calibration circuitry selectively enables the parallel-connected transistors to calibrate output resistance. The parallel transistors converge at a single resistor.

The invention provides a bipolar current pulse generator comprising a control signal generation module used for generating a control signal; the driving control circuit module is connected with the control signal generation module and is used for converting the control signal into a current signal; the pulse generation circuit module is connected with the driving control circuit module and is used for generating inductive current according to the current signal; and the direct current power supply is respectively connected with the control signal generation module and the pulse generation circuit module and is used for supplying power to the control signal generation module and the pulse generation circuit module. And the output current does not change along with the change of the load characteristics, and the output current can be adjusted by changing the charging time and the charging voltage and increasing or decreasing the number of circuit stages.

Portable high-voltage electrical stimulation devices and systems are disclosed that are scalable to utilize a minimal number of output channels to a large number of output channels. The devices and systems include a high-voltage power supply and output pulse circuitry comprising a plurality of output channel circuits. The electrical stimulation devices and systems disclosed herein also provide improved safety features, including an optional safety monitor.

To provide an integrated circuit that makes it possible to properly control the on and off of a transistor.SOLUTION: An integrated circuit includes a transistor configured to control a current flowing through the coil, a control circuit configured to control on and off of the transistor based on a voltage level of a first line that is coupled to a control electrode of the transistor, and a Zener diode having a cathode coupled to the first line and an anode coupled to a second line that is coupled to an electrode of the transistor on the ground side thereof. The Zener diode has such a predetermined capacitance that, when a first signal for controlling the transistor and a second signal of a predetermined frequency higher than the frequency of the first signal are inputted to the first line, the control circuit can control the on and off of the transistor in response to the first signal irrespective of the second signal.SELECTED DRAWING: Figure 2

A high voltage pulse power delivery system is provided that includes dedicated security features including fault detection and fault management. In addition to a normal communication cable, the pulsed power delivery system can provide remote power through a standard multi-conductor cable without dedicated conduits or isolation. This simplifies the installation of the device, increases the overall deployment speed, and significantly reduces the deployment cost. The pulsed power delivery system is further configured to transmit power through the pulsed current waveform.

A high voltage pulse power delivery system is provided that includes dedicated security features including fault detection and fault management. In addition to a normal communication cable, the pulsed power delivery system can provide remote power through a standard multi-conductor cable without dedicated conduits or isolation. This simplifies the installation of the device, increases the overall deployment speed, and significantly reduces the deployment cost. The pulsed power delivery system is further configured to transmit power through the pulsed current waveform.

A transmitter employs simple inverters to predrive cascode-connected pull-up and pull-down output stages. Each output stage includes a drive transistor with a thin gate dielectric for fast switching. The drive transistor is cascode connected to a set of parallel-connected transistors. Calibration circuitry selectively enables the parallel-connected transistors to calibrate output resistance. The parallel transistors converge at a single resistor.

Portable high-voltage electrical stimulation devices and systems are disclosed that are scalable to utilize a minimal number of output channels to a large number of output channels. The devices and systems include a high-voltage power supply and output pulse circuitry comprising a plurality of output channel circuits. The electrical stimulation devices and systems disclosed herein also provide improved safety features, including an optional safety monitor.

The utility model provides a pulse power supply which comprises an even number of pulse power units, every two pulse power units are arranged in a mirror symmetry mode, each pulse power unit comprises a direct current bus capacitor, a power electronic switch device, a follow current circuit, a laminated busbar and a first output copper bar, and the direct current bus capacitors are installed on the laminated busbar; the first end of the electronic power switch device is installed on the positive electrode bar of the laminated busbar, and the second end of the electronic power switch device is connected with the first output copper bar. The follow current circuit is installed close to the power electronic switching device and is connected between the negative electrode bar of the laminated busbar and the second end of the power electronic switching device, and the first output copper bar and the negative electrode bar of the laminated busbar are respectively connected with a load through a conductor. The length of the line between the power electronic switching device and the follow current circuit is greatly reduced, so that the parasitic inductance generated by the line is greatly reduced, and the peak voltage is further reduced.

A semiconductor switch drive circuit includes a drive power source and a semiconductor switch drive portion. The semiconductor switch drive portion includes a connection switching portion, a capacitor for generating a positive voltage, a capacitor to be charged with electric power, and a capacitor for generating a negative voltage. The connection switching portion alternately switches between a first connection state forming a positive voltage application closed circuit that applies the positive voltage to a gate terminal of the semiconductor switch, and a second connection state forming a negative voltage application closed circuit that applies the negative voltage to the gate terminal of the semiconductor switch. A transfer restricting portion is provided between the drive power source and the semiconductor switch, the transfer restricting portion restricting transfer of electric charge from a path flowing through the positive voltage application closed circuit to another path passing through a positive terminal of the capacitor and not through the gate terminal of the semiconductor switch.

The technology described herein is directed towards phase change material-based (e.g., chalcogenide) radio frequency switch device. The switch device has phase change material junctions between selectable ports and a common port, in which the phase change material junctions are controlled to be in either conductive or nonconductive states, thereby respectively coupling or decoupling each selectable port to (or from) the common port. A controller can selectively pulse the respective junctions of a multiport switch device to independently determine their respective conductive or nonconductive states. In one implementation, the switch design is symmetrical so that any one of the multiple selectable ports has very similar performance characteristics to that of any other selectable port. The phase change alloy switch device described herein provides high switching speeds, low insertion loss, good isolation and is relatively straightforward to fabricate.

An integrated circuit comprises an oscillator which outputs a clock signal, a logic circuit portion, a detection circuit portion for detecting signal propagation delay relative to clock frequency, and a power supply which provides a configurable supply voltage. The detection circuit comprises a latch circuit portion, a delay circuit portion and a comparison circuit portion. The latch circuit portion outputs an alternating signal which changes state in dependence on the clock signal. This is received by the delay circuit portion which outputs first and second delayed signals respectively subject to first and second propagation delays each dependent on the supply voltage. The comparison circuit portion compares the alternating signal with the delayed signals, and outputs respective comparison signals if said signals indicate that the respective propagation delay is smaller than the clock signal period. A control circuit portion controls the supply voltage in dependence on the comparison signals.

The invention relates to the technical field of signal processing, and provides a multi-channel pulse low and medium frequency signal generation system, which comprises a signal generation unit used for generating a multi-channel pulse signal, a low frequency signal and a carrier signal; the multi-channel pulse signal modulation unit is used for modulating the multi-channel pulse signal to generate a multi-channel modulation pulse signal; the power control unit is used for performing power control on the low-frequency signal and the multi-channel modulation pulse signal to generate a target low-frequency signal and a multi-channel target pulse signal; and the low and medium frequency signal modulation unit is used for synthesizing the target low frequency signal, the multi-channel target pulse signal and a carrier signal to generate a multi-channel pulse low and medium frequency signal. According to the system, through multi-channel pulse signal modulation and power control, multi-channel pulse low and medium frequency signals are accurately generated, and the flexibility and adaptability of the signals are enhanced.