US PATENT SUBCLASS 455 / 232.1
.~.~ Gain control

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
230  DF  .~ Local control of receiver operation {7}
232.1.~.~ Gain control {2}
233.1  DF  .~.~.~> With diverse control (tone, etc.)
234.1  DF  .~.~.~> Automatic {15}

DEFINITION

Classification: 455/232.1

Gain control:

(under subclass 230) Subject matter wherein the operating characteristic is the ratio of the output of an amplifier to its input.

(1) Note. The subject matter included in this and the indented subclasses will include patents relating to either

signal gain or signal volume control combined with a receiver system since the terms are used more or less synonymously in the art.

SEE OR SEARCH THIS CLASS, SUBCLASS:

136, and 138, for plural separate receivers with output control means.

206+, for automatic volume control means.

210, for frequency or phase modulation type receivers with output limiting means.

254, for means to maintain specified signals-to-noise ratio (i.e., sensitivity control). SEE OR SEARCH CLASS

375, Pulse or Digital Communications,

345, for pulse receivers with automatic amplitude control.