US PATENT SUBCLASS 327 / 56
.~.~.~.~ With reference signal


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}
51  DF  .~.~ With sensing amplifier {2}
52  DF  .~.~.~ Differential amplifier {3}
56.~.~.~.~ With reference signal


DEFINITION

Classification: 327/56

With reference signal:

(under subclass 52) Subject matter wherein a signal of fixed voltage potential acts as a constant for comparison to a variable input.

(1) Note. The reference signal is usually an input signal or produced from an input signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

77+, for amplitude comparison between an input signal and a fixed reference, in general.