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The effect of correlated level shifting on noise performance in switched capacitor circuits

TitleThe effect of correlated level shifting on noise performance in switched capacitor circuits
Publication TypeConference Paper
Year of Publication2012
AuthorsHershberg, B. P., T. Musah, S. T. Weaver, and U. Moon
Conference NameIEEE International Symposium on Circuits and Systems - ISCAS 2012
Pagination942 - 945
Date Published05/2012
PublisherIEEE
Conference LocationSeoul, Korea (South)
ISBN Number978-1-4673-0217-3
Abstract

The relation between opamp noise and the size of the level shifting capacitor in correlated level-shifting (CLS) architectures is explored. Analysis is performed for a Split-CLS switched capacitor amplification circuit, and many of the conclusions in this paper are applicable to more general CLS architectures as well. A theoretical model for noise is developed and shown to be in good agreement with simulation. It is found that for practical design values, the size of the level-shifting capacitor only weakly influences noise performance.

DOI10.1109/ISCAS.2012.6272200