Nonlinear settling behavior in oversampled converters

Author

Wang, Feng ; Harjani, Ramesh

Author_Institution

Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA

fYear

1997

fDate

5-8 May 1997

Firstpage

495

Lastpage

498

Abstract

We present a new analytical model for opamp induced nonlinearity in oversampled converters. This model incorporates both finite slew rate and finite gain bandwidth effects and is valid for both first order and higher order modulators. Theoretical predictions agree very well with measured results from fabricated ICs. The model consists only of circuit design parameters, and can be utilized to explore design tradeoffs and optimize converter performance. For our design the use of our model resulted in a 40% reduction in power consumption without loss of performance

Keywords

integrated circuit design; integrated circuit measurement; integrated circuit modelling; operational amplifiers; sigma-delta modulation; circuit design parameters; design tradeoffs; finite gain bandwidth effects; finite slew rate; first order modulators; higher order modulators; nonlinear settling behavior; opamp induced nonlinearity; oversampled converters; power consumption; sigma-delta modulators; Analytical models; Bandwidth; Capacitors; Circuits; Clocks; Computer simulation; Design optimization; Energy consumption; Feedback; Power system modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 1997., Proceedings of the IEEE 1997

Conference_Location

Santa Clara, CA

Print_ISBN

0-7803-3669-0

Type

conf

DOI

10.1109/CICC.1997.606675

Filename

606675