US PATENT SUBCLASS 327 / 489
.~.~.~.~ Control circuit with common emitter

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}
478  DF  .~.~ Bipolar transistor {2}
482  DF  .~.~.~ Plural {6}
489.~.~.~.~ Control circuit with common emitter {2}
490  DF  .~.~.~.~.~> With current mirror
491  DF  .~.~.~.~.~> With emitter follower

DEFINITION

Classification: 327/489

Control circuit with common emitter:

(under subclass 482) Subject matter wherein the switching control circuit includes a bipolar transistor with the emitter terminal connected to a common ground of the circuit, and the outputs at the collector terminal provide control voltages to the switch.