Title :
A low voltage CMOS rail-to-rail operational amplifier based on flipped differential pairs
Author :
Guo, Chao ; Zhu, Siheng ; Hu, Jun ; Zou, Jingjing ; Sun, Houjun ; Lv, Xin
Author_Institution :
Sch. of Inf. Sci. & Technol., Beijing Inst. of Technol., Beijing, China
Abstract :
This paper introduces a CMOS operational amplifier with constant transconductance, suitable for operation in low voltage environments. A constant transconductance is ensured for the whole common mode input stage which is based on flipped differential pairs. The proposed operational amplifier is designed to operate with a 1-V supply and is implemented in 0.18-μm standard CMOS technology. The results show that a closed-loop unity-gain bandwidth achieves 7.6 MHz and an open-loop low-frequency gain is higher than 73 dB with a 1-MΩ||15-pF load.
Keywords :
CMOS analogue integrated circuits; low-power electronics; operational amplifiers; CMOS technology; flipped differential pairs; frequency 7.6 MHz; low voltage CMOS rail-to-rail operational amplifier; transconductance; voltage 1 V; wavelength 0.18 mum; CMOS integrated circuits; Mirrors; Operational amplifiers; Rail to rail amplifiers; Rail to rail inputs; Transconductance; Transistors; CMOS; low voltage; operational amplifier; rail-to-rail;
Conference_Titel :
Microwave, Antenna, Propagation, and EMC Technologies for Wireless Communications (MAPE), 2011 IEEE 4th International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-8265-8
DOI :
10.1109/MAPE.2011.6156191
