Title :
Very low-voltage fully differential amplifier for switched-capacitor applications
Author :
Dessouky, M. ; Kaiser, A.
Author_Institution :
ASIM, Paris, France
Abstract :
A fully differential opamp suitable for very-low voltage switched-capacitor circuits in standard CMOS technologies is introduced. The proposed two stage opamp needs a simple low voltage CMFB switched-capacitor circuit only for the second stage. Due to the reduced supply voltage, the CMFB circuit is implemented using boot-strapped switches. Minor modifications allow to use chopper stabilization for flicker noise reduction. Two different compensation schemes are discussed and compared using an example for 1 V operation of the amplifier
Keywords :
CMOS analogue integrated circuits; bootstrap circuits; low-power electronics; operational amplifiers; switched capacitor networks; 1 V; CMOS technology; bootstrapped switch; chopper stabilization; compensation; flicker noise; fully differential operational amplifier; low-voltage CMFB switched capacitor circuit; CMOS process; CMOS technology; Clocks; Differential amplifiers; Operational amplifiers; Rail to rail operation; Switched capacitor circuits; Switches; Switching circuits; Voltage;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.857466
