ECL circuit with feedback controlled pull down in output

Details ECL circuit with feedback controlled pull down in output ECL circuit with feedback controlled pull down in output

1991-01-28

1992-06-16

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307454, H03K 19086, H03K 301

Patent

active

051226839

ABSTRACT:
An ECL circuit is designed such that at the beginning of the falling of the output level, the current flowing to an output terminal is rapidly led in the direction where it will be reduced, the potential of the output terminal at this time is directly detected, and a pull down transistor is controlled through a feedback loop, thus assuring high-speed operation and low power consumption. A control circuit is provided to regulate the collector current of the pull down transistor, which is used to drop the level of the potential at the output terminal. This control circuit is so designed that the base current of the pull down transistor is controlled by the operation of another, single transistor, and no capacitor which will obstruct the circuit integration is employed to drive the pull down transistor. The structure of this circuit is therefore advantageous in realizing higher integration.

REFERENCES:
patent: 4539493 (1985-09-01), Varadarajan
patent: 4629913 (1986-12-01), Lechner
patent: 4687953 (1987-08-01), Varadarajan
patent: 4835420 (1989-05-01), Rosky
patent: 4948991 (1990-08-01), Schucker et al.
patent: 4970416 (1990-11-01), Tamegaya
patent: 5041743 (1991-08-01), Matsumoto

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