US PATENT SUBCLASS 327 / 556
.~.~.~ Notch or bandreject

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

524  DF  SPECIFIC IDENTIFIABLE DEVICE, CIRCUIT, OR SYSTEM {22}
551  DF  .~ Unwanted signal suppression {1}
552  DF  .~.~ Active filter {5}
556.~.~.~ Notch or bandreject

DEFINITION

Classification: 327/556

Notch or bandreject:

(under subclass 552) Subject matter wherein a circuit arrangement attenuates a very narrow band of frequencies of an input signal, but will pass frequencies on either side (i.e., higher and lower frequencies) of the narrow band.