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

José Custòdio, Nuno Paulino, João Goes, Erik Bruun

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

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
Title of host publicationProceedings of the 15th IEEE International Conference on Electronics, Circuits and Systems
PublisherIEEE
Publication date2008
Pages1107-1110
ISBN (Print)14-24-42181-0
DOIs
Publication statusPublished - 2008
EventThe IEEE International Conference on Electronics, Circuits and Systems - Malta
Duration: 1 Jan 2008 → …
Conference number: 15

Conference

ConferenceThe IEEE International Conference on Electronics, Circuits and Systems
Number15
CityMalta
Period01/01/2008 → …

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