US PATENT SUBCLASS 455 / 312
.~.~ In demodulator or low frequency (e.g., audio frequency)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
296  DF  .~ Noise or interference elimination {10}
312.~.~ In demodulator or low frequency (e.g., audio frequency)

DEFINITION

Classification: 455/312

In demodulator or low frequency (e.g., audio frequency) amplifier circuit:

(under subclass 296) Subject matter wherein the noise or interference reduction means forms an integral part of or is electrically associated with the circuitry of the demodulator or the low frequency (e.g., audio frequency) amplifier stages of the receiver.