Accurate stability prediction of single-bit higher-order delta-sigma (Δ-Σ) modulators for speech codecs

Lota, J. and Al-Janabi, M. 2011. Accurate stability prediction of single-bit higher-order delta-sigma (Δ-Σ) modulators for speech codecs. in: Proceedings of the 2011 IEEE International Symposium on Circuits and Systems (ISCAS), Rio de Janeiro, Brazil, 15-18 May 2011 IEEE . pp. 1628-1631

Chapter titleAccurate stability prediction of single-bit higher-order delta-sigma (Δ-Σ) modulators for speech codecs
AuthorsLota, J. and Al-Janabi, M.
Abstract

Present approaches for predicting the stability of Delta-Sigma (Δ-Σ) modulators are mostly confined to DC inputs. This poses limitations as practical applications of Δ-Σ modulators involve a wide range of signals other than DC such as speech, audio and multiple sinusoids as is the case for synthetically generated speech or audio or any other signal, through the appropriate composition of multiple sinusoids. In this paper, a quasi-linear model that accurately predicts stability of single-loop 1-bit higher-order Δ-Σ modulators for multiple sinusoids is given. The results of this paper would enable optimization of the design of higher-order single-loop Δ-Σ modulators with increased dynamic ranges for various applications that deploy multiple sinusoidal inputs, as well as any general input signal constructed from multiple sinusoids.

Book titleProceedings of the 2011 IEEE International Symposium on Circuits and Systems (ISCAS), Rio de Janeiro, Brazil, 15-18 May 2011
Page range1628-1631
Year2011
PublisherIEEE
Publication dates
Published2011
ISBN9781424494736
Digital Object Identifier (DOI)doi:10.1109/ISCAS.2011.5937891

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