Title :
Low-voltage low-power fast-settling CMOS operational transconductance amplifiers for switched-capacitor applications
Author :
Yavari, Mohammad ; Shoaei, Omid
Author_Institution :
IC Design Lab, Univ. of Tehran, Iran
Abstract :
This paper presents a new fully differential operational transconductance amplifier (OTA) for low-voltage and fast-settling switched-capacitor circuits in digital CMOS technology. The proposed two-stage OTA is a hybrid class A/AB that combines a folded cascode as the first stage with active current mirrors as the second stage. It employs a hybrid cascode compensation scheme, merged Ahuja and improved Ahuja style compensations, for fast settling.
Keywords :
CMOS analogue integrated circuits; equivalent circuits; error compensation; integrated circuit design; low-power electronics; operational amplifiers; pole assignment; switched capacitor networks; transfer functions; zero assignment; Class AB; cascode compensation; common mode feedback circuits; digital CMOS; fast settling circuits; folded cascode amplifier; fully differential OTA; improved Ahuja style compensations; low-voltage circuits; merged Ahuja compensations; operational transconductance amplifier; pole locations; signal transfer functions; small-signal equivalent circuit; step response; switched-capacitor circuits; two-stage OTA; zero locations; Bandwidth; CMOS digital integrated circuits; CMOS technology; Frequency; Low voltage; Mirrors; Operational amplifiers; Permission; Switched capacitor circuits; Transconductance;
Conference_Titel :
Low Power Electronics and Design, 2003. ISLPED '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
1-58113-682-X
DOI :
10.1109/LPE.2003.1231910
