20results about "Electric pulse generator details" patented technology

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.

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.

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.

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.

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.

Measuring device (10) with a measuring device (11) which is designed to perform a measurement task based on initial measurement parameters, characterized by that the measuring instrument (10) has a synchronization device (12) which is designed to synchronize the first measurement parameters with another measuring instrument (20), and that the measuring instrument (10) is designed to perform a measurement task together with the further measuring instrument (20) based on at least the first measurement parameters.

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.

Embodiments relate to a waveform processing device. The device can include a first input node configured to receive a first signal and a second input node configured to receive a second signal. The device can include a pulse generator including a self-timed digital converter (DTC) with a clock generator (CLK). The device can include a switching network configured to be driven by an output from the pulse generator to modulate the first signal and the second signal in synchronization.

This semiconductor switch drive circuit comprises a drive power source and a semiconductor switch drive unit. The semiconductor switch drive unit comprises: a connection switching unit; a capacitor that generates a positive voltage; a capacitor for power charging; and a capacitor that generates a negative voltage. The connection switching unit alternately switches between: a first connection state, in which a positive voltage application closed circuit is formed to apply a positive voltage to a gate terminal of the semiconductor switch; and a second connection state, in which a negative voltage application closed circuit is formed to apply a negative voltage to the gate terminal of the semiconductor switch. Between the drive power source and the semiconductor switch, a movement restriction unit is provided which restricts movement of an electric charge from a path through the positive voltage application closed circuit to another path that passes through a positive terminal of the capacitor without passing through the gate terminal of the semiconductor switch.

The application discloses a light and small heavy-frequency high-voltage pulse generator in the technical field of high-voltage pulse, which comprises an insulating support, a row switch, an independent switch, an energy storage unit, an isolation inductor and a shell structure, a plurality of switch electrode heads are symmetrically installed on the inner wall of the insulating support, and the row switch is formed by a plurality of self-breakdown switches; the insulating support is made of an insulating material and can be used as the framework structure of the high-voltage pulse generator, thereby being beneficial to maintaining the stability and reliability of the internal physical structure of the high-voltage pulse generator. The insulating support with a flat and multi-wing structure is integrally designed with the gas switch structure, and the energy storage unit and the isolation inductor are fixedly connected, so that the problems of low switch overvoltage coefficient, long axial structure and limited light and small degree of the high-voltage pulse generator can be avoided, and the application demand of portability and high reliability can be met.

This application discloses an orthogonal signal generator and electronic device, belonging to the field of power electronics technology. The orthogonal signal generator includes: a transformer, comprising a primary coil and a secondary coil; a first coupling capacitor, one end of which is electrically connected to the center tap of the primary coil, and the other end of which is electrically connected to the center tap of the secondary coil; a first grounding capacitor, one end of which is electrically connected to the center tap of the primary coil, and the other end of which is grounded; and a second grounding capacitor, one end of which is electrically connected to the center tap of the secondary coil, and the other end of which is grounded. The orthogonal signal generator provided in this application can achieve broadband performance through a single-stage structure.

In accordance with various embodiments of the present disclosure, a circuit to provide a reference current to a device having a first current controlled oscillator (CCO) is provided. In some embodiments, the circuit comprises a reference circuit and a feedback loop circuit. The feedback loop circuit comprises a differential circuit that receives an input voltage from the reference circuit and provides an output current, a second CCO that receives the output current from the differential circuit and produces an output frequency in response, a divider circuit to divide the output frequency into a feedback frequency, and a feedback switched capacitor resistor circuit providing a feedback voltage to the differential circuit based on the feedback frequency. The second CCO has substantially matching performance to the first CCO. The differential circuit adjusts its output current based on a difference between the input voltage and the feedback voltage.

Provided is a transmission system capable of ensuring reliability of signal transmission. The transmission system includes a remote unit that alternately turns on and off a first switching element and a second switching element, thereby alternately outputting a pulse voltage having a positive polarity and a pulse voltage having a negative polarity as a signal; and a main unit that receives input of the signal from the remote unit through a cable, and separates the signal into a first signal corresponding to the pulse voltage having the positive polarity and a second signal corresponding to the pulse voltage having the negative polarity.

The present disclosure provides an integrated circuit which includes a first corrector circuit and a second corrector circuit. The first corrector circuit calibrates a first duty cycle of a first clock signal based on an offset calibration code to generate a first output clock signal. The second corrector circuit calibrate a second duty cycle of a second clock signal based on the offset calibration code to generate a second output clock signal. A first trim code includes a first upper portion and a first lower portion, and a second trim code includes a second upper portion and a second lower portion. A first portion of the offset calibration code is an average of the first upper portion and the second upper portion, and a second portion of the offset calibration code is an average of the first lower portion and the second lower portion.