US PATENT SUBCLASS 327 / 146
.~.~.~ With feedback

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

100  DF  SIGNAL CONVERTING, SHAPING, OR GENERATING {29}
141  DF  .~ Synchronizing {7}
144  DF  .~.~ Using multiple clocks {5}
146.~.~.~ With feedback {1}
147  DF  .~.~.~.~> Phase lock loop {3}

DEFINITION

Classification: 327/146

With feedback:

(under subclass 144) Subject matter wherein a portion of the circuit output is returned to an input.

(1) Note. Positive feedback occurs when a portion of an output signal is fed back in phase with the input to increase amplification and possibly cause oscillation.

(2) Note. Negative feedback occurs when a portion of an output signal is fed back 180 degrees out of phase relative to the input. This decreases amplification, stabilizes circuit performance, and minimizes noise and distortion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

155, for feedback synchronization in general.