notch filter
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notch filter
[′näch ‚fil·tər] (electronics)
A band-rejection filter that produces a sharp notch in the frequency response curve of a system; used in television transmitters to provide attenuation at the low-frequency end of the channel, to prevent possible interference with the sound carrier of the next lower channel.
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 It might be outdated or ideologically biased.
Filter, Notch
a type of rejection filter. A notch filter is a two-terminal network, usually a parallel resonant circuit, that is inserted into an electric circuit. The impedance of the network increases sharply in a certain relatively narrow frequency band. A notch filter attenuates alternating currents in the particular frequency band and transmits currents at frequencies outside the band.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
notch filter
An electronic circuit that reduces a narrow range of frequencies. A notch filter is a type of bandstop filter. For example, in a musical instrument amplifier, a notch filter may reduce the frequencies within the range of 59 to 61 Hz, which is sufficient to eliminate any hum coming from the 60 Hz power line. See bandstop filter.Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.