US PATENT SUBCLASS 381 / 94.6
.~ Hum or ground loop

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

94.1  DF  NOISE OR DISTORTION SUPPRESSION {7}
94.6.~ Hum or ground loop

DEFINITION

Classification: 381/94.6

Hum or ground loop:

(under subclass 94.1) Subject matter designed to eliminate frequency components generated as a result of AC power supply contamination, or compensate for noise transmission caused by currents flowing through an electrical conductor which connects two different circuit points, each of which is nominally at ground potential.

SEE OR SEARCH CLASS

330, Amplifiers,

149, for hum or noise or distortion bucking introduced into

signal channel.

455, Telecommunications,

298+, for noise or interference elimination in the receiver power supply.