US PATENT SUBCLASS 327 / 454
.~.~.~.~.~ With unijunction transistor

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

365  DF  GATING (I.E., SWITCHING INPUT TO OUTPUT) {12}
419  DF  .~ Utilizing three or more electrode solid-state device {7}
438  DF  .~.~ Four or more layer device (e.g., thyristor, etc.) {6}
447  DF  .~.~.~ AC supply {6}
453  DF  .~.~.~.~ Silicon controlled rectifier (SCR) {4}
454.~.~.~.~.~ With unijunction transistor

DEFINITION

Classification: 327/454

With unijunction transistor:

(under subclass 453) Subject matter wherein the switching circuit includes a silicon controlled rectifier combined with a three-terminal semiconductor having only one pn junction and exhibiting a stable open-circuit negative resistance property.

SEE OR SEARCH THIS CLASS, SUBCLASS:

569, for miscellaneous unijunction transistor circuits.