Title :
Modeling and optimization of fast-settling time gain-boosted cascode CMOS amplifiers
Author :
Yang, Yi ; Binkley, David M. ; Li, Changzhi
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of North Carolina at Charlotte, Charlotte, NC, USA
Abstract :
Settling time is a very critical performance requirement for CMOS amplifiers in switched-capacitor circuits. The settling mechanism of gain-boosted amplifiers is very complicated. In this paper, the small-signal model for the gain-boosted cascode amplifier is analyzed. The gain bandwidth product and phase margin optimum values for the gain boosting amplifiers used inside gain-boosted cascode amplifiers are given for the minimum settling time. Finally, we present a low-voltage, high-gain and fast-settling time CMOS amplifier.
Keywords :
CMOS analogue integrated circuits; amplifiers; low-power electronics; fast-settling time CMOS amplifier; gain bandwidth product; gain-boosted cascode CMOS amplifier; high-gain CMOS amplifier; low-voltage CMOS amplifier; phase margin optimum value; small-signal model; switched-capacitor circuit; Bandwidth; Boosting; Energy consumption; High power amplifiers; Performance gain; Poles and zeros; Power amplifiers; Semiconductor device modeling; Switched capacitor circuits; Transfer functions; Gain-boosted amplifier; gain boosting amplifier; settling time; switched-capacitor circuit;
Conference_Titel :
IEEE SoutheastCon 2010 (SoutheastCon), Proceedings of the
Conference_Location :
Concord, NC
Print_ISBN :
978-1-4244-5854-7
DOI :
10.1109/SECON.2010.5453927
