Constant current circuit with small output current fluctuation

Details Constant current circuit with small output current fluctuation Constant current circuit with small output current fluctuation

1998-06-29

2000-02-29

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327542, 327543, 323312, 323315, G05F 110

Patent

active

060314141

ABSTRACT:
A constant current circuit whose output current is less dependent on a current gain of a transistor or an Early voltage thereof is provided. The constant current circuit includes a differential circuit between transistors forming a constant current generating unit and a current mirror circuit. This differential circuit operates as a feedback circuit and the mirror coefficient of the current mirror circuit becomes hardly affected by the current gain or the Early voltage.

REFERENCES:
patent: 5304862 (1994-04-01), Memida
patent: 5381083 (1995-01-01), Inamori et al.
patent: 5654665 (1997-08-01), Menon et al.
patent: 5760639 (1998-06-01), Hall

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