Emitter-coupled logic circuit

Details Emitter-coupled logic circuit Emitter-coupled logic circuit

1989-08-04

1990-10-30

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307363, H03K 19013, H03K 19086, H03K 1704

Patent

active

049671065

ABSTRACT:
An emitter-coupled logic circuit, including first to fourth n-p-n transistors, the first transistor having its base connected to a first input signal source and its collector connected to a first supply voltage source, the second transistor having its base connected to a second input signal source and its collector connected to the first supply voltage source, the first and second transistors having their emitters connected to a second supply voltage source via a constant current source, an n-p-n transistor type emitter-follower circuit having an input terminal connected to the collector of the first transistor and its collector connected to the first supply voltage source, a load element connected between the first supply voltage source and the collector of the first or second transistor, the third transistor having its base connected to a reference voltage source and its collector connected to the first supply voltage source, the fourth transistor having its base connected to the base of the first transistor, its collector connected to the emitter of the third transistor and its emitter connected to the second supply voltage source, and a p-n-p transistor type emitter-follower circuit having an input terminal connected to a node between the emitter of the third transistor and the collector of the fourth transistor, the n-p-n and p-n-p transistor type emitter-follower circuits having output terminals connected together to provide an output terminal of the logic circuit.

REFERENCES:
patent: 3573489 (1971-04-01), Sramek
patent: 4585957 (1986-04-01), Ooms
patent: 4695749 (1987-09-01), Lam
patent: 4736124 (1988-04-01), McFarland, Jr.
patent: 4757216 (1988-07-01), Tanahashi
patent: 4771190 (1988-09-01), Umeki

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