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Accurate stability prediction of one-bit higher-order delta-sigma (Δ-Σ) modulators for multiple-sinusoidal inputs

Lota, Jaswinder and Al-Janabi, Mohammed and Kale, Izzet (2012) Accurate stability prediction of one-bit higher-order delta-sigma (Δ-Σ) modulators for multiple-sinusoidal inputs. IET Circuits, Devices & Systems, 6 (2). pp. 71-78. ISSN 1751-858X

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Official URL: http://dx.doi.org/10.1049/iet-cds.2011.0194

Abstract

The present approaches on predicting 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 multiple-sinusoidal inputs for speech modelling. In this study, a quasi-linear model for Δ-Σ modulators with non-linear feedback control analysis is presented that accurately predicts stability of single-loop one-bit higher-order Δ-Σ modulators for multiple sinusoids. Theoretical values are shown to match closely with the simulation results. The results of this study would significantly speed up the design and evaluation of higher-order single-loop Δ-Σ modulators with increased dynamic ranges for various applications that require multiple-sinusoidal inputs or any general input composed of a finite number of sinusoidal components.

Item Type:Article
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:10423
Deposited On:24 Apr 2012 11:51
Last Modified:24 Apr 2012 11:51

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