Charge-pump assisted low-power/low-voltage CMOS op amp design

Author

Zhou, J. ; Ziazadeh, R.M. ; Ng, H.-H. ; Ng, H.-T. ; Allstot, D.J.

Author_Institution

Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA

fYear

1997

fDate

18-20 Aug. 1997

Firstpage

108

Lastpage

109

Abstract

Low-voltage/low-power requirements have become essential considerations in modern mixed-signal designs. In this paper, we present a 1.8 V multi-stage opamp designed using a standard 0.6 /spl mu/m n-well CMOS process. The op amp designs include a new high efficiency DC-DC converter used in a low-voltage frequency compensation configuration that tracks process, temperature, and supply voltage variations and enables accurate pole-zero cancellation. Low-power operation is compared in passive and active g/sub m/ feedforward compensation techniques. An automatic threshold calibration scheme is also described.

Keywords

CMOS analogue integrated circuits; calibration; compensation; convertors; feedforward; operational amplifiers; poles and zeros; voltage multipliers; 0.6 micron; 1.8 V; CMOS op amp; DC-DC converter; LV frequency compensation configuration; active g/sub m/ feedforward compensation; automatic threshold calibration scheme; charge-pump assisted op amp design; low-power CMOS op amp design; low-voltage CMOS opamp design; multi-stage op amp; n-well CMOS process; passive g/sub m/ feedforward compensation; pole-zero cancellation; process variations tracking; supply voltage variations; temperature variations tracking; CMOS technology; Calibration; Charge pumps; Circuits; DC-DC power converters; Frequency; MOSFETs; Permission; Resistors; Threshold voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Low Power Electronics and Design, 1997. Proceedings., 1997 International Symposium on

Conference_Location

Monterey, CA, USA

Print_ISBN

0-89791-903-3

Type

conf

Filename

621252