US PATENT SUBCLASS 327 / 89
.~.~.~ With differential amplifier

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}
89.~.~.~ With differential amplifier

DEFINITION

Classification: 327/89

With differential amplifier:

(under subclass 77) Subject matter including a device responsive to the offset between two input voltages or currents and nonresponsive to voltages or currents which are identical in the two inputs.