A CMOS band-gap voltage reference with low offset

Author

Liu, Yuntao ; Liu, Xiaowei ; Yin, Liang

Author_Institution

MEMS Center, Harbin Inst. of Technol., Harbin, China

fYear

2008

fDate

20-23 Oct. 2008

Firstpage

1785

Lastpage

1788

Abstract

A CMOS band-gap voltage reference with the characteristics of low offset and low supply voltage is presented in this paper. In order to reduce the effect of offset of operational amplifier, two feedback loops are introduced, so as to the factor of Â¿V_BE is maximized meanwhile the factor of offset could be minimized. The area of layout is 1.5Ã—1.3 mm² with a 0.5 um CMOS process. Post-simulation results show that the temperature coefficients of output is 9 ppm/Â°C over the range from -50Â°C to 85Â°C, and PSRR of the circuit at low frequency is -90 dB.

Keywords

CMOS integrated circuits; circuit feedback; energy gap; integrated circuit layout; operational amplifiers; CMOS band-gap voltage reference; CMOS process layout; feedback loops; operational amplifier offset; size 0.5 mum; temperature -50 C to 85 C; temperature coefficients; Bipolar transistors; CMOS process; Circuits; Current density; Feedback loop; Impedance; Low voltage; Operational amplifiers; Photonic band gap; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated-Circuit Technology, 2008. ICSICT 2008. 9th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2185-5

Electronic_ISBN

978-1-4244-2186-2

Type

conf

DOI

10.1109/ICSICT.2008.4734902

Filename

4734902