pulse generator


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to pulse generator: Signal generator, Function generator

pulse generator

[′pəls ‚jen·ə‚rād·ər]
(electricity)
(electronics)
A generator that produces repetitive pulses or signal-initiated pulses.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Pulse generator

An electronic circuit capable of producing a waveform that rises abruptly, maintains a relatively flat top for an extremely short interval, and then rapidly falls to zero. A relaxation oscillator, such as a multivibrator, may be adjusted to generate a rectangular waveform having an extremely short duration, and as such it is referred to as a pulse generator. However, there is a class of circuits whose exclusive function is generating short-duration, rectangular waveforms. These circuits are usually specifically identified as pulse generators. An example of such a pulse generator is the triggered blocking oscillator, which is a single relaxation oscillator having transformer-coupled feedback from output to input.

Pulse generators sometimes include, but are usually distinguished from, trigger circuits. Trigger circuits generate a short-duration, fast-rising waveform for initiating or triggering an event or a series of events in other circuits. In the pulse generator, the pulse duration and shape are of equal importance to the rise and fall times. See Trigger circuit

The term pulse generator is often applied not only to an electronic circuit generating prescribed pulse sequences but to an electronic instrument designed to generate sequences of pulses with variable delays, pulse widths, and pulse train combinations, programmable in a predetermined manner, often microprocessor-controlled.

A network, formed in such a way as to simulate the delay characteristics of a lossless transmission line, and appropriate switching elements to control the duration of a pulse form the basis for a variety of types of pulse generators. Some delay-line-controlled pulse generators are capable of generating pulses containing considerable amounts of power for such applications as modulators in radar transmitters. See Wave-shaping circuits

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
As clear from the schematic in Figure 1, the GGA output is inverted and applied to the pull up PMOSFET [M.sub.3] of the output pulse shaper; as a result, the pulse generator output at the drain of the output transistors becomes [V.sub.DD].
In this paper, a novel high voltage pulse generator has been constructed based on DC-DC CWVM converters is investigated.
We designed a digital pulse generator that supports a variable pulse width and PRI for UWB radar.
The monocycle pulse generator is fabricated on FR4 glass epoxy substrate.
Its pulse generator sends data to required devices for volume totalization.
"No episodes of loss of capture or changes in lead impedances or battery voltages were noted," and there was no damage to pacemaker circuits and no movement of the pulse generator, the investigators said (J.
More than 15 years of medical research, combined with technical development, has produced a new treatment for alleviating the symptoms of Meniere's disease: the Meniett[TM] Low-Pressure Pulse Generator from Medtronic Xomed, Inc.
By using the metallic housing of the pulse generator as an active electrode, combined with the ENDOTAK[R] two-electrode defibrillation lead, energy is sent via a dual-current pathway from the distal shocking electrode to the proximal electrode and to the pulse generator case.
Cardiologists can check the pacemaker's settings and collect information stored in its pulse generator with a computerized device that uses radio signals.
Usage: A small pulse generator implanted below the shoulder is attached to three pacing leads that deliver electrical impulses to the right atrium and each ventricle, providing simultaneous biventricular pacing.
The model PB-5 programmable precision pulse generator includes a full-featured, highly flexible ramp generator and complete programmability.