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Incremental Data Converters at Low Oversampling Ratios

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2 Author(s)
Trevor C. Caldwell ; Department of Electrical and Computer Engineering, University of Toronto, Canada ; David A. Johns

In this paper the use of incremental A/D converters with low oversampling ratios is investigated. Incremental A/D converters are able to achieve a higher SQNR than delta-sigma modulators at oversampling ratios below 4, allowing them to operate as higher bandwidth converters with medium resolution. The impact of removing the input S/H, as well as analyzing their behaviour at an OSR as low as 1 is explored. An eighth-order cascaded incremental A/D converter is analyzed and shown as an example.

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IEEE Transactions on Circuits and Systems I: Regular Papers  (Volume:57 ,  Issue: 7 )