US PATENT SUBCLASS 327 / 313
.~.~.~.~ Using 3 or more terminal type nonlinear devices only

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}
306  DF  .~ Amplitude control {5}
309  DF  .~.~ By limiting, clipping, or clamping {10}
310  DF  .~.~.~ Transient or signal noise reduction {4}
313.~.~.~.~ Using 3 or more terminal type nonlinear devices only

DEFINITION

Classification: 327/313

Using 3 or more terminal type nonlinear devices only:

(under subclass 310) Subject matter wherein the circuit includes one or more elements having an output which is not in direct proportion to its input and having more than two electrodes as the only type of active element.