Accurate stability prediction of 1-bit higher-order Δ-Σ modulators for multiple-sinusoidal inputs

Article

Lota, J. 2012. Accurate stability prediction of 1-bit higher-order Δ-Σ modulators for multiple-sinusoidal inputs. Journal of the IET Circuits, Devices & Systems. 6 (2), pp. 71-78.
AuthorsLota, J.
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 modeling. In this paper, a quasi-linear model for Δ-Σ modulators with nonlinear feedback control analysis is presented that accurately predicts stability of single-loop 1-bit higher-order Δ-Σ modulators for multiple sinusoids. Theoretical values are shown to match closely with simulation results. 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 require multiple-sinusoidal inputs or any general input composed of a finite number of sinusoidal components.

Keywordsdelta-sigma; stability analysis; non-linear systems; multiple inputs
JournalJournal of the IET Circuits, Devices & Systems
Journal citation6 (2), pp. 71-78
Year2012
Accepted author manuscript
License
CC BY-ND
Web address (URL)http://hdl.handle.net/10552/1556
Publication dates
PrintMar 2012
Publication process dates
Deposited13 Apr 2012
Additional information

Citation:
Lota, J., Al-Janabi, M. and Kale, I. (2012) ‘Accurate stability prediction of 1-bit higher-order Δ-Σ modulators for multiple-sinusoidal inputs,’ Journal of the IET Circuits, Devices & Systems, 6(2), 71-78..

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