ECL integrated circuit allowing fast operation

Details ECL integrated circuit allowing fast operation ECL integrated circuit allowing fast operation

1995-05-30

1996-11-12

Hudspeth, David R.

Electronic digital logic circuitry

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

Bipolar transistor

326 18, H03K 19086

Patent

active

055743919

ABSTRACT:
In an ECL circuit, when a potential of an input signal A changes from "L" to "H", an output signal D correspondingly changes from "H" to "L", and, at this time, an output sent from a switching stage circuit is supplied to a gate of a PMOS transistor via a control capacitor. Thereby, a base current of a pull-down transistor flows, and change of a potential of an output terminal node is promoted. An NMOS transistor receiving the potential of the output terminal node is arranged between a node and a VEE supply terminal. Therefore, when the potential changes, the current flowing through a transistor decreases, and the base current of the pull-down transistor further increases, so that the change of the output signal D is further promoted.

REFERENCES:
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"A 23-PS/2.1-MW ECL Gate with an AC-Coupled Active Pull-Down Emitter-Follower Stage", Kai-Yap TOH et al, IEEE J. Solid-State Circuits, vol. 24, No. 5, Oct. 1989.

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