US PATENT SUBCLASS 330 / 294
.~.~ Having frequency-responsive means or phase-shift means in feedback path

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

250  DF  WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) {21}
291  DF  .~ Including signal feedback means {3}
294.~.~ Having frequency-responsive means or phase-shift means in feedback path

DEFINITION

Classification: 330/294

Having frequency responsive means or phase shift means in the feedback path:

(under subclass 291) Subject matter having frequency-responsive means or phase-shift means in the feedback path that causes corresponding changes in amplifier gain.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, and 109, for amplifiers having frequency- or phase-responsive means in the feed-back path.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

113+, for miscellaneous frequency control, subclasses 231+ for a phase shift of less than an input signal period, subclasses 2+ for phase discriminating without subsequent control, and subclasses 39+ for frequency discriminating without subsequent control.