Inverter function logic gate

Details Inverter function logic gate Inverter function logic gate

1984-03-12

1986-08-12

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307446, 307471, 307443, 307454, 307475, H03K 19086, H03K 19013, H03K 19092, H03K 1920

Patent

active

046058710

ABSTRACT:
A bipolar logic gate is provided which will perform logical operations involving the complement of one or more input signals. The gate resembles the conventional ECL OR/NOR gate circuit except that a level shift input transistor is substituted for the standard reference transistor and shifts the voltage level of the input signal whose complement is to be included in the logical operation. A voltage shift of about -0.4 volts occurs either at the base or on the emitter of the level shift input transistor. As a consequence of the voltage shift and subsequent comparison with unshifted voltages, the input voltages are compared with each other rather than with a reference voltage, V.sub.BB. Logically, the complement of the input is included in the OR'd and NOR'd outputs provided on the output lines. The logic gate may be incorporated in combinational and sequential logic circuits.

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Sechler, "Logic Circuit"; IBM-TDB; vol. 7, No. 10, pp. 961; 3/1965.
Millman et al, "Pulse, Digital, and Switching Circuits"; McGraw-Hill Book Co.; pp. 328-330; 1965.

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