US PATENT SUBCLASS 327 / 17
.~.~ 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}
13  DF  .~ By shape {3}
17.~.~ With reference signal

DEFINITION

Classification: 327/17

With reference signal:

(under subclass 13) Subject matter wherein a signal of predetermined shape acts as a constant for comparison to a variable input.