squelch


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squelch

Electronics a circuit that cuts off the audio-frequency amplifier of a radio receiver in the absence of an input signal, in order to suppress background noise

squelch

[skwelch]
(electronics)
To automatically quiet a receiver by reducing its gain in response to a specified characteristic of the input.

squelch

squelchclick for a larger image
A simple squelch circuit.
A circuit in a radio receiver that keeps the volume down when no signal is being received, but the volume builds up as soon as a signal is received. The function of a squelch is to adjust the sensitivity of the receiver by eliminating unwanted weak signals that cause background noise such as static, hash, or hiss. Most squelch controls are automatic, but there are a few manual squelch controls, too. Squelch circuits are used in communications equipment, which have long periods of silence between transmissions.
References in periodicals archive ?
Squelch will also use the sale of its wellies to raise money for a good cause.
He added: "It was all we could find around the house and I was concerned he didn't get his feet wet." Squelch!
Receivers use squelch detect circuits to recognize this condition, or the absence of this condition.
Every time I get a new copy, I immediately check out all the humor--the cartoons, the limerick, the "Perfect Squelch," and the "Post Scripts." (I say keep those two pages coming.)
I don't want to squelch anyone's right to hold whatever religious view he or she wants.
"Does branding squelch revolutionary consciousness?" I asked Inaba as I whizzed by.
He further claims that science does itself a disservice when it allows a stifling orthodoxy to squelch offbeat ideas.
Just days prior I had been troubleshooting a radio receiver with my supervisor and discovered a bad squelch module.
Central Bank officials, fearful of business leaders' reactions to the reports, went into a tizzy and were accused of trying to squelch the results.
But fired director John Galten told the Associated Press that he believes Privett's real motivation was to squelch a prominent conservative Catholic voice.
In the 1950s and '60s, insecticide programs seemed to squelch the disease.