US PATENT SUBCLASS 381 / 7
.~.~.~.~ Switch-type detector or modulator

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

1  DF  BINAURAL AND STEREOPHONIC {8}
2  DF  .~ Broadcast or multiplex stereo {2}
3  DF  .~.~ FM final modulation {1}
4  DF  .~.~.~ AM subcarrier {7}
7.~.~.~.~ Switch-type detector or modulator {2}
8  DF  .~.~.~.~.~> Two diodes
9  DF  .~.~.~.~.~> Four or more diodes

DEFINITION

Classification: 381/7

Switch-type detector or modulator:

(under subclass 4) Subject matter having a detector or modulator which extracts information from or adds information to an input waveform only at instants determined by a selector pulse.