US PATENT SUBCLASS 327 / 490
.~.~.~.~.~ With current mirror

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  DF  .~.~.~.~ Control circuit with common emitter {2}
490.~.~.~.~.~ With current mirror

DEFINITION

Classification: 327/490

With current mirror:

(under subclass 489) Subject matter wherein the control circuit relies on the collector current matching of two transistors when connected together base to base and emitter to emitter with one transistor having its collector connected

to its base.

(1) Note. The collector currents are matched by having a predetermined ratio relationship to each other. When one of the collector current changes, the other also changes to keep the ratio relationship constant.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems,

315, for a current regulator using a current mirror.