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Title

On chopper effects in discrete-time ΣΔ modulators

AuthorsLéger, G. ; Ginés, A. J. ; Peralías, E. ; Rueda, Adoración
KeywordsSigmaDelta
Chopper
Issue DateSep-2010
PublisherInstitute of Electrical and Electronics Engineers
CitationIEEE Transactions on Circuits and Systems I: Regular Papers 57(9): 2438-2449 (2010)
AbstractAnalog-to-digital converters based on ΣΔ modulators are used in a wide variety of applications. Due to their inherent monotonous behavior, high linearity, and large dynamic range, they are often the preferred option for sensor and instrumentation. Offset and flicker noise are usual concerns for this type of applications, and one way to minimize their effects is to use a chopper in the front-end integrator of the modulator. Due to its simple operation principle, the action of the chopper in the integrator is often overlooked. In this paper, we provide an analytical study of the static effects in ΣΔ modulators, which shows that the introduction of chopper is not transparent to the modulator operation and should thus be designed with care.
Publisher version (URL)http://dx.doi.org/10.1109/TCSI.2010.2043996
URIhttp://hdl.handle.net/10261/60025
DOI10.1109/TCSI.2010.2043996
ISSN1549-8328
Appears in Collections:(IMSE-CNM) Artículos
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