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Micropower 'Relative Precision' 15 bit A/D Converter
Auteur(s)
Grisoni, L.
Heubi, Alexandre
Grassi, Sara
Balsiger, Peter
Pellandini, Fausto
Date de parution
1995
In
Proceedings of the International Conference on Signal Processing, Applications and Technology (ICSPAT), International Conference on Signal Processing, Applications and Technology (ICSPAT), 1995///420-424
Résumé
State of the art A/D converters are still critical in power-sensitive, battery-operated equipment like hearing aids. In this article, a new approach is presented that features excellent signal quality, 85 dB dynamic range equivalent to a 15-bit output word, 16 kHz sampling rate, 25 μW power consumption, and 0.54 mm<sup>2</sup> chip area. Compared to standard components, the enormous power savings result from a sophisticated circuit design which limits the signal to quantization noise ratio to roughly 40 dB. Subjective listening tests prove, however, that the resulting signals are hardly distinguishable from their unprocessed versions, a remarkable fact due to masking effects inherent in the human auditory system.
Identifiants
Autre version
http://www.unine.ch/imt/pub/pub8esp/pblsearchlab.php
Type de publication
journal article
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