US PATENT SUBCLASS 327 / 43
.~.~.~ With logic or bistable circuit

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}
39  DF  .~ By frequency {3}
40  DF  .~.~ Comparison between plural inputs {3}
43.~.~.~ With logic or bistable circuit

DEFINITION

Classification: 327/43

With logic or bistable circuit:

(under subclass 40) Subject matter wherein the frequency comparison of plural signals (a) includes a device performing Boolean functions such as AND, OR, or exclusive-OR or (b) utilizes a device having two stable states.

(1) Note. The combination of logic with specific frequency comparison circuitry or function, not elsewhere classified is classified here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

185+, for particular stable state circuits including bistable.

SEE OR SEARCH CLASS

326, Electronic Digital Logic Circuitry,

93+, for clocking or synchronizing of one or more logic stages and appropriate subclasses for general digital logic circuitry not classified elsewhere. 331, Oscillators,

1, for automatic frequency control synchronization with logic elements.