Title :
Power-efficient amplifier frequency compensation for continuous-time delta-sigma modulators
Author :
Do Yeon Yoon ; Hae-Seung Lee ; Gealow, Jeffrey
Author_Institution :
EECS, MIT, Cambridge, MA, USA
Abstract :
In this paper, we present a hybrid operational amplifier (opamp) frequency compensation topology to maximize a unity-gain bandwidth (UGBW) particularly for use in continuous-time delta-sigma modulators (CT ΔΣMs). Unlike well-known existing compensation topologies [1], the proposed compensation technique provides both a maximum UGBW and an adequate phase margin (PM) by appropriate non-dominant pole and zero positions. The proposed topology performance is validated by SPICE simulation using 28nm CMOS device models.
Keywords :
CMOS analogue integrated circuits; compensation; delta-sigma modulation; operational amplifiers; CMOS device models; CT ΔΣMs; PM; SPICE simulation; UGBW; continuous-time delta-sigma modulators; hybrid operational amplifier frequency compensation topology; nondominant pole; opamp frequency compensation topology; phase margin; power-efficient amplifier frequency compensation; size 28 nm; unity-gain bandwidth; zero positions;
Conference_Titel :
Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on
Conference_Location :
Columbus, OH
DOI :
10.1109/MWSCAS.2013.6674710
