US PATENT SUBCLASS 326 / 132
.~.~ With negative resistance device (e.g., tunnel diode, thyristor, etc.)

Current as of: June, 1999
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326 /   HD   ELECTRONIC DIGITAL LOGIC CIRCUITRY

104  DF  FUNCTION OF AND, OR, NAND, NOR, or NOT {7}
124  DF  .~ Bipolar transistor (e.g., RTL, DCTL, etc.) {5}
132.~.~ With negative resistance device (e.g., tunnel diode, thyristor, etc.)

DEFINITION

Classification: 326/132

With negative resistance device (e.g., tunnel diode, etc.):

(under subclass 124) Subject matter wherein the bipolar transistor logic circuit includes a semiconductor device characterized by an operating current-voltage plot having a portion with a negative slope.

(1) Note. Devices such as tunnel diodes, back diodes, or four or more layer diodes, are proper for this subclass, as well as devices which switch on or avalanche as a result of negative resistance conduction induced by increasing an electrical field condition (e.g., IMPATT or GUNN effect elements, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

134, for negative resistance diode logic functions of AND, OR, NAND, NOR, or NOT.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

568+, for miscellaneous negative resistance circuits.