Title :
Incremental Data Converters at Low Oversampling Ratios
Author :
Caldwell, Trevor C. ; Johns, David A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada
fDate :
7/1/2010 12:00:00 AM
Abstract :
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.
Keywords :
analogue-digital conversion; delta-sigma modulation; delta-sigma modulator; incremental A/D converter; incremental data converter; low oversampling ratios; Delta-sigma modulation; incremental analog-digital (A/D) converter; oversampled data conversion; switched capacitor circuits;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2009.2034879
