Title :
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
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 ¿VBE is maximized meanwhile the factor of offset could be minimized. The area of layout is 1.5×1.3 mm2 with a 0.5 um CMOS process. Post-simulation results show that the temperature coefficients of output is 9 ppm/°C over the range from -50°C to 85°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;
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
DOI :
10.1109/ICSICT.2008.4734902
