CMOS reference current source

Details CMOS reference current source CMOS reference current source

2006-09-29

2009-08-11

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S538000, C323S313000

Reexamination Certificate

active

07573325

ABSTRACT:
A CMOS reference current source comprises two circuit branches connected in parallel between supply terminals. The first circuit branch includes a series connection of a bias current source (MP1) and a first MOS transistor (MN1) of a first conductivity type. The second circuit branch includes a series connection of a diode-connected MOS transistor (MP2) of a second conductivity type, a second MOS transistor (MN2) of the first conductivity type and a third MOS transistor (MN3) of the first conductivity type. The first MOS transistor (MN1) of the first conductivity type has its gate connected to the drain of the third MOS transistor (MN3) of the first conductivity type. The second MOS transistor (MN2) of the first conductivity type has its gate connected to the drain of the first MOS transistor (MN1) of the first conductivity type. The third MOS transistor (MN3) the first conductivity type has its gate connected to a bias source (MN4).

REFERENCES:
patent: 4507573 (1985-03-01), Nagano
patent: 2002/0039044 (2002-04-01), Kwak et al.
patent: 2004/0150465 (2004-08-01), Nishida et al.
patent: 2006/0001412 (2006-01-01), Fernald
patent: 2006/0132223 (2006-06-01), Cherek
patent: 19530472 (1995-08-01), None
patent: 19940382 (1999-08-01), None
J. Webster (ed.), Wiley Encyclopedia of Electrical and Electronics Engineering. 1999 John Wiley & Sons, Inc. pp. 454-462.

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