US PATENT SUBCLASS 342 / 103
.~.~.~.~ Phase locked loop

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

73  DF  RETURN SIGNAL CONTROLS RADAR SYSTEM {3}
89  DF  .~ Receiver {4}
98  DF  .~.~ Frequency {2}
102  DF  .~.~.~ Phase {1}
103.~.~.~.~ Phase locked loop

DEFINITION

Classification: 342/103

Phase locked loop:

(under subclass 102) Subject matter including circuit means to compare the phases of an output signal and the return signal of a target, with any phase differences converted into a correction voltage that causes the phase of the output signal to change so that it tracks the return signal.