Current biasing for I.sup.2 L circuits

Details Current biasing for I.sup.2 L circuits Current biasing for I.sup.2 L circuits

1991-03-25

1992-03-03

Mis, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307477, 3072966, H03K 301, H03K 19091

Patent

active

050935852

ABSTRACT:
A negative feedback loop, including a two collector I.sup.2 L gate having one collector returned to the input of the gate and forcing a reference current into the other of the two collectors of the gate, is used to match the current at the collector of the injector of the gate to the reference current. The feedback loop further includes a current source for sourcing the reference current and a pair of cascoded emitter follower transistors coupled between the current source and the injector input of the gate such that the feedback loop will regulate the current through the injector to be equal to the reference current. The injector input of the gate of the feedback loop can be coupled to the injector inputs of similar I.sup.2 L gates to be biased therefrom such that the injector currents are well controlled.

REFERENCES:
patent: 4593206 (1986-06-01), Neidorff et al.

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