US PATENT SUBCLASS 330 / 254
.~.~ Having gain control means

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

250  DF  WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) {21}
252  DF  .~ Including differential amplifier {9}
254.~.~ Having gain control means

DEFINITION

Classification: 330/254

Having gain control means:

(under subclass 252) Subject matter including circuitry which controls the amplification of the applied signal.

(1) Note. Gain is any increase in power when a signal is transmitted from one point to another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

278+, for other semiconductor amplifiers with gain control.

SEE OR SEARCH CLASS

348, Television,

645+, for color television circuits having gain control.