Tri-state logic circuit

Details Tri-state logic circuit Tri-state logic circuit

1976-02-13

1977-06-14

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307251, 307270, H03K 100, H03K 1908

Patent

active

040299716

ABSTRACT:
A line driver including a pair of complementary transistors having their conduction paths serially connected between an operating and a reference potential and their bases connected through a first switch to a signal input terminal. A second switch is connected between the common base connection and the common connection of the conduction paths. With the second switch open and the first closed, an output voltage, responsive to the input signal, corresponding to first or second binary values is obtained. When the second switch is closed and the first opened, the transistor pair is turned off, disconnecting the line driver from its load, thereby providing tri-state logic operation.

REFERENCES:
patent: 3739193 (1973-06-01), Pryor
patent: 3879619 (1975-04-01), Pleshko
patent: 3906254 (1975-09-01), Lane et al.
patent: 3949242 (1976-04-01), Hirasawa et al.

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