Manufacturing independent constant current power source

Details Manufacturing independent constant current power source Manufacturing independent constant current power source

1998-07-06

2000-09-05

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327543, 323315, G05F 302, H03K 1714

Patent

active

061149004

ABSTRACT:
A semiconductor integrated circuit having a power source circuit which assures a constant operating current without regard to manufacture fluctuations is provided. Saturated range of MOS transistors are used as a reference current source, and the current is applied to a load using current mirror circuits so that the current through the load is equal to the current in of the reference current source. A constant operating current is provided without regard to manufacture fluctuations.

REFERENCES:
patent: 4446444 (1984-05-01), Patterson, III
patent: 4791326 (1988-12-01), Vajdic et al.
patent: 5300837 (1994-04-01), Fischer
patent: 5329177 (1994-07-01), Nagai
patent: 5598122 (1997-01-01), McClure
patent: 5793247 (1998-08-01), McClure
Japanese Office Action (Feb. 1, 2000) with English translation of portion regarding teachings of prior art.

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