US PATENT SUBCLASS 330 / 290
.~ Including D.C. feedback bias control for stabilization


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330 /   HD   AMPLIFIERS

250  DF  WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) {21}
290.~ Including D.C. feedback bias control for stabilization


DEFINITION

Classification: 330/290

Including D.C. feedback bias control for stabilization:

(under subclass 250) Subject matter with feedback circuit for direct currents, for the purpose of operating point stabilization as compensating for changes in temperature, aging, etc.., of the semiconductor device, or devices, which may include means such as bypass capacitors to eliminate signal feedback.

(1) Note. This does not include a mere bypass emitter resistor unless D.C. derived therefrom is applied to another electrode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

9, for amplifiers with periodic switching for input-output comparison including those having feedback circuits for drift correction, etc..

97, for amplifiers including D.C. path for signal feedback.

259, for D.C. feedback in differential amplifiers.

270, for D.C. feedback in push-pull complementary symmetry amplifiers.