Noninverting current-mode logic gate

Details Noninverting current-mode logic gate Noninverting current-mode logic gate

1975-12-08

1977-02-08

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307299A, 307296, H03K 1700

Patent

active

040073840

ABSTRACT:
A high speed bipolar noninverting current-mode logic AND gate is the basic building block for a current-mode logic family. The AND gate comprises a current steering differential pair of transistors, a pair of dual emitter input transistors, a dual emitter reference transistor, an output resistor and a fixed current source. The conducting state of the current steering transistor pair is so controlled that a logic "one" at the base electrodes of both input transistors produces a logic "one" at an output terminal taken from the collector electrode of the reference transistor. Further, a logic "zero" at both input transistors produces a logic "zero" at the output terminal and finally the condition of a "zero" at one input and a "one" at the other input produces a "zero" at the output. This result is attained as a consequence of control of the conduction state of the current steering pair so as to provide the same current level through the reference transistor for the "zero-one" input as for the "zero-zero" input, thus producing the noninverting AND function.

REFERENCES:
patent: 3523194 (1970-08-01), Sheng
patent: 3539824 (1970-11-01), Yu et al.
patent: 3629610 (1971-12-01), Wilhelm
patent: 3869623 (1975-03-01), Mimner

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