US PATENT SUBCLASS 327 / 137
.~.~ Having 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}
131  DF  .~ Generating sawtooth or triangular output {9}
137.~.~ Having feedback

DEFINITION

Classification: 327/137

Having feedback:

(under subclass 131) Subject matter wherein a portion of the output signal is returned to the input.