Band gap reference voltage circuit

Details Band gap reference voltage circuit Band gap reference voltage circuit

2007-10-30

2007-10-30

Le, Don (Department: 2819)

Electricity: power supply or regulation systems

Self-regulating

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

C323S314000, C326S083000

Reexamination Certificate

active

11242051

ABSTRACT:
In a band gap reference voltage circuit, a band gap cell circuit composed of two transistors is driven with different current densities under a bias condition in which first and second reference voltages output in accordance with the operating states of the two transistors are equal to each other, thereby outputting a band gap reference voltage from a reference voltage output line. A differential amplifying circuit that is supplied with the first and second reference voltages as differential input signals subjects the differential input signals thus supplied to differential amplification. A level shift circuit is connected between a power supply line and the reference voltage output line and supplied with an output voltage of the differential amplifying circuit to carry out a level shift operation on the output voltage concerned.

REFERENCES:
patent: 5229710 (1993-07-01), Kraus et al.
patent: 5352972 (1994-10-01), Pernici et al.
patent: 5568045 (1996-10-01), Koazechi
patent: 6710586 (2004-03-01), Yamamoto
patent: 6788131 (2004-09-01), Huang
patent: 2006/0238215 (2006-10-01), Kim et al.
patent: A-07-230332 (1995-08-01), None
patent: A-2002-341953 (2002-11-01), None

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