A new interpolation technique for TI ΣΔ A/D converters

Chadi Jabbour, Ali Beydoun, Van Tam Nguyen, Patrick Loumeau

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Time interleaved sigma-delta converter is a potential candidate for multi-mode wideband analog to digital (A/D) converters dedicated for multistandard receivers. However, the interpolation by zeros recquired to compress the useful signal bandwidth at the input of the sigma-delta modulator imposes constraints on the implementation of the analog part leading to a very large die area due to the high value required for the sampling capacitor. This paper proposes a new interpolation technique using extra samples instead of zeros resulting from the oversampling of the input signal. This new technique not only reduces the die area but also the anti-alias filter order. The proposed technique was validated in a 4 channel time interleaved sigma-delta multimode A/D converter designed in 1.2 V 65 nm CMOS process.

Original languageEnglish
Title of host publicationISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems
Subtitle of host publicationNano-Bio Circuit Fabrics and Systems
Pages4013-4016
Number of pages4
DOIs
Publication statusPublished - 31 Aug 2010
Externally publishedYes
Event2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010 - Paris, France
Duration: 30 May 20102 Jun 2010

Publication series

NameISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems

Conference

Conference2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010
Country/TerritoryFrance
CityParis
Period30/05/102/06/10

Keywords

  • Analog-to-digital conversion
  • Interpolation
  • Sigma-delta
  • Time-interleaving

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