Series-gated emitter-coupled logic circuit providing closely spa

Details Series-gated emitter-coupled logic circuit providing closely spa Series-gated emitter-coupled logic circuit providing closely spa

1995-06-05

1996-04-16

Westin, Edward P.

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Bipolar transistor

326 33, 327538, H03K 19086, H03K 1920

Patent

active

055086420

ABSTRACT:
An emitter-coupled logic circuit provides differential outputs which are delivered to pairs of transistors in emitter-coupled logic (ECL) switches. The differential outputs allow additional ECL switches to be connected between a positive and negative supply voltage. A unique current source for the ECL switches includes diodes and/or transistors connected in parallel with the ECL switches such that the supply current is relatively independent of fluctuations in the supply voltage and yet the voltage drop across the current source is minimized.

REFERENCES:
patent: 4145621 (1979-03-01), Colaco
patent: 4670673 (1987-06-01), Varadarajan
patent: 4714841 (1987-12-01), Shoji et al.
patent: 4737663 (1988-04-01), Varadarajan
patent: 4751404 (1988-06-01), Yuen
patent: 5111074 (1992-05-01), Gravrok et al.
patent: 5128561 (1992-07-01), Montegari
F100K ECL Data Book, Fairchild Camera and Instrument Corp., 1982, pp. 2-5 to 2-10.

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