Current switching logic type circuit with small current consumpt

Details Current switching logic type circuit with small current consumpt Current switching logic type circuit with small current consumpt

1995-03-06

1997-02-11

Westin, Edward P.

Electronic digital logic circuitry

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

Bipolar transistor

326 18, 326 26, H03K 19086, H03K 1901

Patent

active

056024983

ABSTRACT:
An emitter-coupled logic circuit having superior drivability, stable operation, and obtaining complementary outputs. A pair of input differential transistors have their emitters coupled to a first current source in common, their bases connected to receive respective input signals, and outputting complementary logic values corresponding to the respective input signals. Pull-up and pull-down transistors are provided for respective ones of a pair of output terminals. Bases of the pull-up transistors are supplied with collector voltages of the input transistors and their emitters are connected to the respective output terminals. The bases of the pull-down transistors are supplied with the respective input signals, their emitters are coupled to a second current source in common, and their collectors are connected to the respective output terminals. A stabilizing circuit is connected to the respective output terminals to maintain the pull-up transistors in conducting states.

REFERENCES:
patent: 4289978 (1981-09-01), Konian et al.
patent: 4748346 (1988-05-01), Emori
patent: 4926071 (1990-05-01), MacMillan et al.
patent: 5338980 (1994-08-01), Ovens
"High Speed Digital Circuits", Kai-Yap Toh et al., International Solid State Circuits Conference Feb. 1989, pp. 224-225.
"A 23-PS/2.1-M W ECL Gate With An Ac-Coupled Active Pull-Down Emitter-Follower Stage", Kai-Yap Toh et al., IEEE Journal of Solid-State Circuits, vol. 24, No. 5, Oct. 1989, pp. 1301-1306.

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