US PATENT SUBCLASS 327 / 68
.~.~.~ Input provides varying 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}
63  DF  .~.~ Comparison between plural varying inputs {5}
68.~.~.~ Input provides varying reference signal

DEFINITION

Classification: 327/68

Input provides varying reference signal:

(under subclass 63) Subject matter wherein at least one of the fluctuating inputs provides a changing signal to be used only as an evaluation standard.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72, for amplitude discriminating where a reference signal is internally derived from one of the inputs.