US PATENT SUBCLASS 330 / 281
.~.~.~ With time constant means

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}
279  DF  .~.~ And significant control voltage developing means {2}
281.~.~.~ With time constant means

DEFINITION

Classification: 330/281

With time constant means:

(under subclass 279) Subject matter including a circuit for filtering the control voltage, and wherein specific details or distinctive characteristics of such circuit are claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

127+, 143 and 144+, for amplifiers which may include time-constant means in the control voltage path thereof.

SEE OR SEARCH CLASS

455, Telecommunications,

239.1+, for gain-controlled receivers which may include time-constant means in the control voltage path thereof.