Multi-Bit Sigma-Delta Modulators with Enhanced Dynamic Range using Non-Linear DAC for Hearing Aids

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2008

  • Author: Custòdio, José

  • Author: Paulino, Nuno

    Universidade Nova de Lisboa, Campus da FCT/UNL

  • Author: Goes, João

    Universidade Nova de Lisboa, Campus da FCT/UNL

  • Author: Bruun, Erik

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This paper presents the possibility of employing non-linear low-resolution DACs in the feedback paths of multi-bit second-order Sigma-Delta modulators. The proposed technique is particularly attractive in applications such as hearing aids, requiring a very large dynamic range and medium signal-to-noise-plus-distortion-ratio. As demonstrated through simulated results in which noise and mismatch effects are included, for the same over-sampling ratio, improvements in the order of 6-to-9 dB in the dynamic range can be achieved when comparing with the same topology employing linear-DACs.
Original languageEnglish
TitleProceedings of the 15th IEEE International Conference on Electronics, Circuits and Systems
PublisherIEEE
Publication date2008
Pages1107-1110
ISBN (print)14-24-42181-0
DOIs
StatePublished

Conference

ConferenceThe IEEE International Conference on Electronics, Circuits and Systems
Number15
CityMalta
Period01/01/08 → …
CitationsWeb of Science® Times Cited: No match on DOI
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