US PATENT SUBCLASS 327 / 8
.~.~.~.~ With varying frequency

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}
2  DF  .~ By phase {1}
3  DF  .~.~ Comparison between plural inputs (e.g., phase angle indication, lead-lag discriminator, etc.) {5}
7  DF  .~.~.~ With reference signal {4}
8.~.~.~.~ With varying frequency

DEFINITION

Classification: 327/8

With varying frequency:

(under subclass 7) Subject matter wherein the reference signal varies over a range of different frequencies or the reference signal is compared to different frequency signals.