Delay Circuit

delay circuit

[di′lā ‚sər·kət]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Delay Circuit


an electronic simulation device for reproduction of a signal with a delay equal to a predetermined time interval τ. Delay circuits are used in the simulation of technological processes associated with matter transfer or the channeling of power, in the approximation of equations describing complex objects, and as a component of certain automatic control and monitoring systems. For example, using a delay circuit connected to an electrical network it is possible to record not only a breakdown of the network but also the process preceding the occurrence of the breakdown. In actual practice τ can vary from fractions of a second to dozens of minutes. The operation of a delay circuit is based on the use of magnetic recording, the capability of electrical capacitors of retaining a charge, and an approximation of the transfer function in an ideal delay component.

In a magnetic delay circuit the time delay is proportional to the distance between the recording and playback heads. The delay is also inversely proportional to the linear speed of the data carrier. In capacitor delay circuits, signals are “memorized” in the form of an electrical charge of the capacitors that is proportional to the voltage level supplied to the circuit. The process of memorizing (delay) consists in the sequential switching of the voltage (signal) to the capacitors or the sequential transmission of the voltage through a series of capacitors. The data thus delayed are reproduced by sequential connection of the charged capacitors to a voltage indicator (a voltmeter or oscillograph) or are read out by recharging thfe last capacitor in the series. The delay time of a delay circuit is proportional to the number of capacitors and inversely proportional to the switching frequency. Electromechanical systems limit the ultimate switching speed and decrease the reliability of delay circuits; therefore, their use is feasible only for low-frequency input signals.


Kogan, B. la. Elektronnye modeliruiushchie ustroistva i ikh primenenie dlia issledovaniia sistem avtomaticheskogo regulirovaniia, 2nd ed. Moscow, 1963.
Doganovskii, S. A., and V. A. Ivanov. Bloki reguliruemogo zapazdyvaniia. Moscow-Leningrad, 1960.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The output signal is given to a delay circuit for generation of pulsed clock signal to derive the short width pulses.
reported an enhancement of feedforward amplifiers by adopting superluminal delay circuit [11].
Lim, "Miniaturized dual-band negative group delay circuit using dual-plane defected structures," IEEE Microwave and Wireless Components Letters, vol.
In this paper, we investigate a comprehensive method to design a negative group delay circuit with low signal attenuation, wide NGD bandwidth and good magnitude flatness based on a coupling matrix along with a resonator's finite unloaded-quality factor.
SurgeX ICE (Inrush Current Elimination) technology with zero cross turn-on removes the need for time delay circuit breakers or startup sequencing.
Video I/O is standard definition, HD, and computer resolutions, and the audio mixer includes motor-driven faders for audio-follow-video operation as well as an audio delay circuit for lip-sync.
The delay circuit in the power amplifier path compensates for the delay in the IM generators and IM control circuits.
This current limitation, coupled with an internal delay circuit (which is faster than a typical thermal breaker), also makes it better able to precisely handle momentary overloads.
Using CableComp technology for sharp image reproduction, the monitor solves the problem of weakened signals by using a digitized signal delay circuit to automatically compensate for each red, green and blue cable's length and video signal delay.
On the way to the beam splitter one signal goes through a variable optical delay circuit intended to compensate both for the rotation of the earth during tracking and changes in atmospheric turbulence.
Since IEEE 802.11 b protocol is required to generate frequency from 2.412 GHz to 2.484 GHz, the proposed delay circuit makes the ring-VCO working on this frequency range, which is certainly a key parameter of readerless, active RFID transponder.