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

1996-10-23

1998-05-19

Westin, Edward P.

Electronic digital logic circuitry

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

Bipolar transistor

326 18, 326 26, 327202, H03K 19086, H03K 1901

Patent

active

057540624

ABSTRACT:
First emitters of a pair of input multi-emitter transistors are connected to a current source in common, to form an input differential amplifier. The other emitters of the input multi-emitter transistors are connected to current sources respectively. 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 multi-emitter transistors, while those of the pull-down transistors are supplied with voltages of the other emitters of the multi-emitter transistors. Provided is an emitter-coupled logic circuit which has excellent load drivability, operates stably and obtains complementary outputs at a low cost.

REFERENCES:
patent: 4289978 (1981-09-01), Konian et al.
patent: 4748346 (1988-05-01), Emori
patent: 4810908 (1989-03-01), Suzuki et al.
patent: 4877977 (1989-10-01), Kokado
patent: 4926071 (1990-05-01), MacMillan et al.
patent: 5001361 (1991-03-01), Tamamura et al.
patent: 5338980 (1994-08-01), Ovens
"High Speed Digital Circuits", Kai-Yap Toh et al., International Solid State Circuits Conference '89, 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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