US PATENT SUBCLASS 327 / 78
.~.~.~ Reference level crossover detecting

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}
77  DF  .~.~ Input signal compared to single fixed reference {10}
78.~.~.~ Reference level crossover detecting {1}
79  DF  .~.~.~.~> Zero crossover

DEFINITION

Classification: 327/78

Reference level crossover detecting:

(under subclass 77) Subject matter wherein an output signal is produced when an input signal actually transits the reference amplitude of a comparison standard.

(1) Note. The approach of the input signal to the reference level may be from either a positive or a negative direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

63+, for evaluation of plural sources of varying input signals relative to each other.

74+, for evaluation of an input signal relative to plural fixed thresholds.