US PATENT SUBCLASS 327 / 73
.~.~.~ Reference derived by feedback

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

1  DF  SPECIFIC SIGNAL DISCRIMINATING (E.G., COMPARING, SELECTING, ETC.) WITHOUT SUBSEQUENT CONTROL {11}
50  DF  .~ By amplitude {9}
72  DF  .~.~ Input signal compared to reference derived therefrom {1}
73.~.~.~ Reference derived by feedback

DEFINITION

Classification: 327/73

Reference derived by feedback:

(under subclass 72) Subject matter wherein the processing includes extracting a signal from an output terminal of the circuit and applying a portion of the extracted signal to an input terminal.