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|Title: ||Multi-bit sigma-delta modulators with enhanced dynamic-range using non-linear DAC for hearing aids|
|Authors: ||Goes, J.|
Custódio, J. R.
|Issue Date: ||Aug-2008|
|Abstract: ||This paper presents the possibility of employing nonlinear 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-tonoise-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.|
|Description: ||15th IEEE International Conference on Electronics, Circuits and Systems, Malta|
|Appears in Collections:||FCT: DEE - Documentos de conferências internacionais|
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