14results about "Single pulse train generator" patented technology

Thermionic generators are described herein that include a variety of features that allow the devices to efficiently and effectively convert large amounts of thermal energy directly to electrical energy, such as in the form of currents and / or voltages. For example, the thermionic generators can be used to generate an electron beam from a thermionic emission device, and focus or shape the electron beam in such a way that allows the energy of electrons in the electron beam to be captured and converted to electrical energy.

A high-speed four-phase 25% duty cycle clock generator is provided. The four-phase clock generator includes a four-stage ring structure including four transistors of a first conductivity type, each transistor configured as a common-source structure and interconnected in a ring topology to sequentially and cyclically reset phases of an output clock; a first alternating phase cross-coupled pair including two transistors of the first conductivity type to cross-couple a first and third phase of the output clock; a second alternating phase cross-coupled pair including two transistors of the first conductivity type to cross-couple a second and fourth phase of the output clock; and a set network including four transistors of a second conductivity type to sequentially and cyclically set the phases of the output clock in response to four gated clock signals generated by alternately gating phases of an input clock and the phases of the output clock.

A system includes a base PSU having a voltage output, an extender PSU having a voltage output coupled in series with the voltage output of the base PSU, and a pulse switch circuit. The pulse switch circuit includes a voltage input coupled with the voltage output of the base PSU and with the voltage output of the extender PSU, a voltage output, a base switch assembly coupled in series between the voltage output of the base PSU and the voltage output of the pulse switch circuit, an extender switch assembly coupled in series between the voltage output of the extender PSU and the voltage output of the pulse switch circuit, and a clamp circuit. A controller is configured to control the base switch assembly, the extender switch assembly, and the clamp circuit based on an input received from a load sensor coupled to a load.

A system configured to provide a non-thermal plasma from a variety of feed gases is described. The system includes a plasma applicator; a feed gas source providing a gas flow to the plasma applicator; a power supply configured to deliver electrical power via a transmission line to an electrode of the plasma applicator; a signal generator configured to provide a drive signal to the power supply; and a controller. The controller is configured to receive at least one input status parameter associated with a quality of plasma delivered by the plasma applicator; and provide at least one parameter value for at least one parameter defining an output signal waveform of the power supply. The at least one parameter value is taken from the group consisting of: duty factor, pulse rate, pulse width, pulse delay, pulse modulation and pulse shape.

The present application relates to a kind of multi-mode noise interference signal generation method, belong to signal interference technical field, solve the problem that existing cannot dynamically flexibly generate the interference signal of multiple modulation modes and the high development complexity.For method includes: according to noise kind and interference mode, obtain first noise sequence, second noise sequence, third noise sequence, noise interference bandwidth and center frequency;Carrier signal is generated based on center frequency;First noise sequence and noise interference bandwidth are passed into first multiplier, then the output result and carrier signal are passed into adder, and first complex signal is output by direct digital synthesizer;First complex signal and second noise sequence are passed into complex multiplier, and second complex signal is output;Second complex signal and third noise sequence are passed into second multiplier, and noise interference signal is output.The generation of multi-mode noise interference signal dynamically flexibly is realized.

Embodiments include methods performed by an apparatus configured to generate output signals for transmission. Such methods include detecting a triggering condition related to a change in operational status of the apparatus and selecting one of a plurality of pre-shaping vectors based on the triggering condition and past operating conditions of the apparatus during a plurality of most recent time intervals. Each pre-shaping vector includes a plurality of values that compensate for effects of voltage variation of a power supply for the apparatus. Such methods include, during a plurality of time intervals after the triggering condition, applying the values of the selected pre-shaping vector to respective information-carrying signals, thereby generating pre-shaped information-carrying signals. Such methods include generating output signals for transmission during the plurality of subsequent time intervals, using the pre-shaped information-carrying signals. The output signals are generated by an active circuit powered by the power supply.

A system includes a first PSU, a second PSU coupled in series with the first PSU, and a pulse switch circuit The pulse switch circuit includes a voltage input coupled with the first PSU and with the second PSU, a voltage output, a first switch assembly coupled in series between the first PSU and the voltage output, a second switch assembly coupled in series between the 5 second PSU and the voltage output, and a clamp circuit coupled to the voltage output. A controller controls the first switch assembly, the second switch assembly, and the clamp circuit based on an input received from a load sensor coupled to a load.

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

The utility model relates to the technical field of molecular pumps, and discloses a molecular pump identification circuit and a molecular pump, the molecular pump identification circuit is connected with a control module, the molecular pump identification circuit comprises a pulse output device and an energy storage device, the pulse output device is respectively connected with a preset reference voltage, the control module and the energy storage device; the pulse output device is used for sending the electric energy of the preset reference voltage to the energy storage device for storage and discharging the electric energy of the energy storage device; the energy storage device is used for charging and discharging and sending an energy storage voltage signal to the pulse output device; and the pulse output device is further used for receiving the energy storage voltage signal, comparing the energy storage voltage signal with a preset voltage signal, and outputting pulse signals with different frequencies according to a comparison result, so that the control module identifies the model of the molecular pump according to the frequencies. The problem that limited recognition types exist when a divider resistor is used for recognizing the magnetic suspension molecular pump is solved.

The utility model discloses an atomization plate hardware circuit composed of a 555 timer, which relates to the technical field of atomization plate circuit research and comprises a power interface circuit, a power filter circuit, the 555 timer, a peripheral circuit and a post-stage circuit. The power supply interface circuit is connected with the input end of the power supply filter circuit through a connector, the output end of the power supply filter circuit is connected with a pin 8 and a pin 4 of the 555 timer, and the 555 timer is connected with the peripheral circuit and the G end of an NMOS (N-channel metal oxide semiconductor) tube in the post-stage circuit; stable voltage is generated through the power supply filter circuit, stable square waves are generated through the 555 timer, the three-pin inductor is used for boosting and then makes contact with the probe through the contact, the probe is connected to the atomization piece, and therefore mist is successfully output, and stable mist can be generated; and the whole circuit for controlling mist discharge adopts the smallest and fewest circuit elements, so that stable mist discharge in an ultra-small space can be completed.

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

The invention discloses an electromagnetic ultrasonic thickness measuring method based on low-voltage excitation, which belongs to the technical field of nondestructive testing, and comprises the following steps: selecting a sub-pulse signal; generating a random sequence and an output sequence based on a Golay code; dynamically selecting a first sub-pulse which does not contain zero level or a second sub-pulse which contains zero level according to values of adjacent bits in the random sequence, and synthesizing a pulse signal; multiplying the pulse signal by a random signal to obtain an output signal, and exciting an electromagnetic ultrasonic transducer after power amplification; and a receiving end multiplies the collected original signal by the inverse code of the pulse signal to obtain an actual receiving signal, and finally performs related processing on the actual receiving signal and the long pulse string signal to obtain a thickness measurement result. The receiving interval is dynamically inserted into the excitation signal, so that echo aliasing in detection of the thin-wall test piece is effectively avoided, and meanwhile, the requirement on excitation voltage is remarkably reduced on the premise of ensuring the signal-to-noise ratio.

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

A system includes a base PSU having a voltage output, an extender PSU having a voltage output coupled in series with the voltage output of the base PSU, and a pulse switch circuit. The pulse switch circuit includes a voltage input coupled with the voltage output of the base PSU and with the voltage output of the extender PSU, a voltage output, a base switch assembly coupled in series between the voltage output of the base PSU and the voltage output of the pulse switch circuit, an extender switch assembly coupled in series between the voltage output of the extender PSU and the voltage output of the pulse switch circuit, and a clamp circuit. A controller is configured to control the base switch assembly, the extender switch assembly, and the clamp circuit based on an input received from a load sensor coupled to a load.