Emitter-coupled logic (ECL) circuit with an inductively coupled

Details Emitter-coupled logic (ECL) circuit with an inductively coupled Emitter-coupled logic (ECL) circuit with an inductively coupled

1992-08-31

1994-06-14

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307446, 257531, H03K 19086, H03K 19013

Patent

active

053213211

ABSTRACT:
An emitter-coupled logic circuit includes a differential pair of transistors and an emitter follower output stage. A load inductor is connected to one of the differential transistors and a load resistor is connected to the other one of the differential transistors. The emitter follower output stage having an input node connected to the load resistor and an output node is connected to a constant current source formed by a current source transistor and an inductor which is AC-coupled to the load inductor by a mutual induction effect. The pull-up and pull-down delay times of the emitter coupled logic circuit can be reduced in a wide range from a light load to a heavy load.

REFERENCES:
patent: 3728559 (1973-04-01), Spann et al.
patent: 4005317 (1977-01-01), Hinrichs
patent: 4144591 (1979-03-01), Brady
patent: 4687953 (1987-08-01), Varadarajan
patent: 4785345 (1988-11-01), Rawls et al.
patent: 4906869 (1990-03-01), Masuoka
patent: 5027013 (1991-06-01), Coy et al.

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