Title :
0.5-V operational transconductance amplifier for CMOS bandgap reference application
Author :
Wang, Han ; Ye, Qing
Author_Institution :
Inst. of Microelectron., Chinese Acad. of Sci., Beijing
Abstract :
A positive feedback technique that make possible the operation of operational transconductance amplifier (OTA) with very low supply voltage, down to 0.5V, is proposed. The MOSFETs providing quasi-linear temperature characteristic are used along with the proposed OTA to design a low voltage bandgap reference circuit. The 0.045-mm2 chip fabricated in SMIC 0.18-mum CMOS process generates 0.4V reference voltage with the supply down to 0.56V with a maximum temperature coefficient of 80ppm/degC, The total current is 4.8 muA at the room temperature
Keywords :
CMOS integrated circuits; MOSFET; feedback; operational amplifiers; reference circuits; 0.18 micron; 0.4 V; 0.5 V; 0.56 V; 4.8 muA; CMOS bandgap reference circuit; MOSFET; operational transconductance amplifier; positive feedback; temperature coefficient; CMOS technology; Circuits; Low voltage; MOSFETs; Operational amplifiers; Photonic band gap; Stability; Temperature; Threshold voltage; Transconductance;
Conference_Titel :
Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0160-7
Electronic_ISBN :
1-4244-0161-5
DOI :
10.1109/ICSICT.2006.306400
