US PATENT SUBCLASS 367 / 98
.~.~.~ Automatic gain or threshold control

Current as of: June, 1999
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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

87  DF  ECHO SYSTEMS {6}
95  DF  .~ Returned signal used for control {2}
97  DF  .~.~ Receiver system {1}
98.~.~.~ Automatic gain or threshold control

DEFINITION

Classification: 367/98

Automatic gain or threshold control:

(under subclass 97) Subject matter in which the output signal level of the acoustic wave receiver or the minimum response level of some part of the receiver is controlled by the reflected wave.