US PATENT SUBCLASS 327 / 243
.~.~.~ 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}
231  DF  .~ Phase shift by less than period of input {7}
237  DF  .~.~ Variable or adjustable {9}
243.~.~.~ With feedback {2}
244  DF  .~.~.~.~> With phase comparator or detector
245  DF  .~.~.~.~> Having multiple outputs

DEFINITION

Classification: 327/243

With feedback:

(under subclass 237) Subject matter wherein a portion of the output signal 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:

154, for feedforward synchronization.

155+, for feedback synchronization.