US PATENT SUBCLASS 340 / 310.04
.~.~.~ Zero crossing

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

286.01  DF  SYSTEMS {24}
310.01  DF  .~ Signal over power line {6}
310.03  DF  .~.~ Noise reduction (e.g., filtering) {1}
310.04.~.~.~ Zero crossing

DEFINITION

Classification: 340/310.04

Zero crossing:

(under subclass 310.03) Subject matter including means to extract information from its carrier wave at a region close to the zero crossing point of the carrier wave.