US PATENT SUBCLASS 327 / 549
.~.~ With hum or interaction prevention

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}
530  DF  .~ With specific source of supply or bias voltage {9}
549.~.~ With hum or interaction prevention

DEFINITION

Classification: 327/549

With hum or interaction prevention:

(under subclass 530) Subject matter wherein alternating or hum components in an output of a power supply are prevented from appearing in the output system circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

551+, for miscellaneous unwanted signal elimination.

SEE OR SEARCH CLASS

330, Amplifiers,

149, for bucking hum, noise or distortion introduced into the amplifier signal channel.

363, Electric Power Conversion Systems, 39+, for current conversion systems that introduce or eliminate frequency components.

381, Electrical Audio Signal Processing Systems and Devices, appropriate subclasses for audio signal noise suppression.