Title :
A capacitor-mismatch-insensitive switch-capacitor amplifier for Pipeline ADC
Author :
Wang, Chunlei ; Zheying Li ; Liu, Xiang ; Li, Bo ; Li, Yuemei
Author_Institution :
Beijing Jiaotong Univ., Beijing
Abstract :
A new approach to achieve a switched-capacitor amplifier (SCA) for pipeline ADC with reduced sensitivity to capacitors´ mismatches is presented in this paper. It uses a operational transconductance amplifier (OTA) in two phases to produce the gain of two. In addition , a low-power CMOS OTA with near rail-to-rail output swing is presented. The proposed circuit is based on the current-mirror OTA topology. Comparing to the conventional SCA , the mismatches between the capacitors has a very smaller influence on the accuracy of the gain of two, and the OTA achieves high dc gain and good gain-bandwidth. The integrated circuit is designed in a 0.18 mum CMOS process.
Keywords :
CMOS integrated circuits; analogue-digital conversion; capacitors; low-power electronics; operational amplifiers; capacitor-mismatch-insensitive switch-capacitor amplifier; current-mirror OTA topology; integrated circuit; low-power CMOS OTA; near rail-to-rail output swing; operational transconductance amplifier; pipeline ADC; CMOS technology; Capacitors; Costs; Energy consumption; Impedance; Operational amplifiers; Pipelines; Switching circuits; Transconductance; Voltage;
Conference_Titel :
ASIC, 2007. ASICON '07. 7th International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4244-1132-0
Electronic_ISBN :
978-1-4244-1132-0
DOI :
10.1109/ICASIC.2007.4415670
