US PATENT SUBCLASS 455 / 218
.~ Squelch

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
218.~ Squelch {5}
219  DF  .~.~> With automatic gain or volume control
220  DF  .~.~> Adjustable
221  DF  .~.~> Audio responsive
222  DF  .~.~> Noise controlled {1}
225  DF  .~.~> Plural paths

DEFINITION

Classification: 455/218

Squelch:

(under subclass 130) Subject matter where the receiver gain is automatically reduced (quieted) in response to a specified characteristic of the input signal.

(1) Note. The specified characteristic is usually a lack of carrier wave or the presence of excessive noise.

SEE OR SEARCH THIS CLASS, SUBCLASS:

212+, for frequency or phase modulation receivers with squelch.