Author(s):
Goes, J. 
; Paulino, N. ; Custódio, J. R.
Date: 2008
Persistent ID: http://hdl.handle.net/10362/4056
Origin: Repositório Institucional da UNL
Document details
Multi-bit sigma-delta modulators with enhanced dynamic-range using non-linear D...
Description
15th IEEE International Conference on Electronics, Circuits and Systems, Malta 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.
15th IEEE International Conference on Electronics, Circuits and Systems, Malta 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.
Document Type
Conference Object
Language English
Language English
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