US PATENT SUBCLASS 257 / 553
.~.~.~ Transistors of same conductivity type (e.g., npn) having different current gain or different operating voltage characteristics

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

499  DF  INTEGRATED CIRCUIT STRUCTURE WITH ELECTRICALLY ISOLATED COMPONENTS {9}
544  DF  .~ With pn junction isolation {8}
552  DF  .~.~ With bipolar transistor structure {3}
553.~.~.~ Transistors of same conductivity type (e.g., npn) having different current gain or different operating voltage characteristics

DEFINITION

Classification: 257/553

Transistors of same conductivity type (e.g., npn) having different current gain or different operating voltage characteristics:

(under subclass 552) Subject matter wherein plural bipolar transistor structures are present which have the same electrical conductivity type (e.g., npn) but have different current gain or different operating voltage characteristics.