US PATENT SUBCLASS 330 / 282
.~.~ Having feedback means acting as variable impedance

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

250  DF  WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) {21}
278  DF  .~ Including gain control means {4}
282.~.~ Having feedback means acting as variable impedance {1}
283  DF  .~.~.~> Having emitter degeneration

DEFINITION

Classification: 330/282

Having feedback means acting as variable impedance:

(under subclass 278) Subject matter including a feedback means acting as a variable impedance to control the gain of the amplifier.

SEE OR SEARCH THIS CLASS, SUBCLASS:

86, for amplifiers having variable impedance in feedback path varied by separate control path.