US PATENT SUBCLASS 326 / 56
TRI-STATE (I.E., HIGH IMPEDANCE AS THIRD STATE)

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326 /   HD   ELECTRONIC DIGITAL LOGIC CIRCUITRY

56TRI-STATE (I.E., HIGH IMPEDANCE AS THIRD STATE) {1}
57  DF  .~> With field effect-transistor {1}

DEFINITION

Classification: 326/56

TRI-STATE (I.E., HIGH IMPEDANCE AS THIRD STATE):

(under the class definition) Subject matter wherein the logic device produces any of three conditions on one line: (a) a definite high voltage (logic 1); (b) a definite low voltage (logic 0); or (c) a high impedance or open-circuit condition (i.e., a floating state or undefined state) which permits another part of the circuit to determine whether the line will be high or low.