Low-voltage current reference and method thereof

Details Low-voltage current reference and method thereof Low-voltage current reference and method thereof

2011-01-04

2011-01-04

Behm, Harry (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C323S901000, C323S312000

Reexamination Certificate

active

07863883

ABSTRACT:
A low-voltage current reference providing a current being substantially constant with temperature includes a low voltage bandgap, a start circuit coupled to the low voltage bandgap, and a current summer coupled to the low voltage bandgap and to the start circuit. The low voltage bandgap is for providing a constant voltage reference, and the start circuit is for starting the low voltage bandgap from a non-start mode and for providing a proportional to absolute temperature (PTAT) current reference. The current summer is for providing a constant current reference according to the constant voltage reference and the PTAT current reference.

REFERENCES:
patent: 6191646 (2001-02-01), Shin
patent: 2006/0279270 (2006-12-01), Chen et al.
patent: 2008/0018319 (2008-01-01), Chang et al.
Banba et al; A CMOS Bandgap Reference Circuit with Sub-1-V Operation; May 1999; IEEE Journal of Solid-State Circuits; vol. 34; No. 5; pp. 670-674.

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