US PATENT SUBCLASS 327 / 559
.~.~.~ Highpass

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}
559.~.~.~ Highpass

DEFINITION

Classification: 327/559

Highpass:

(under subclass 552) Subject matter wherein a circuit arrangement allows passage of frequencies of an input signal above a predetermined threshold frequency and blocks passage of frequencies below that threshold.