US PATENT SUBCLASS 330 / 261
.~.~ Having particular biasing arrangement

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}
261.~.~ Having particular biasing arrangement

DEFINITION

Classification: 330/261

Having particular biasing arrangement:

(under subclass 252) Subject matter with specific details or

distinctive characteristics of the biasing means applied to the amplifying device.

(1) Note. Merely claiming biasing means or bias filter by name only, or broadly without significant detail or distinctive characteristics, is insufficient for classification in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

199+, for particular biasing in other amplifiers.

267, for particular biasing in combination with complementary symmetry.

273, for particular biasing in combination with a push-pull amplifier.

285, for particular biasing in gain control means. 296, for particular biasing in other transistor amplifiers.