Bandgap reference voltage generating circuit for obtaining...

Details Bandgap reference voltage generating circuit for obtaining... Bandgap reference voltage generating circuit for obtaining...

2008-12-26

2011-12-20

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S316000

Reexamination Certificate

active

08080989

ABSTRACT:
A bandgap reference voltage generating circuit, includes: at least two bipolar transistors; an operational amplifier; a first PMOS transistor; and a second PMOS transistor whose source is connected to the upper limit power supply voltage and which supplies the reference current to the bipolar transistors. Further, the bandgap reference voltage generating circuit includes a third PMOS transistor whose source is connected to the upper limit power supply voltage; a fourth PMOS transistor whose source is connected to the upper limit power supply voltage and gate is connected to a drain of the third PMOS transistor; a first NMOS transistor whose source is connected to the lower limit power supply voltage and drain is connected to a drain of the fourth PMOS transistor; and a second NMOS transistor whose drain is connected to the operational amplifier and gate is connected to the drain of the first NMOS transistor.

REFERENCES:
patent: 4857823 (1989-08-01), Bitting
patent: 5610506 (1997-03-01), McIntyre
patent: 5629611 (1997-05-01), McIntyre
patent: 6018235 (2000-01-01), Mikuni
patent: 6677808 (2004-01-01), Sean et al.
patent: 2008/0231248 (2008-09-01), Hung

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