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Stability predictions for higher-order band-pass sigma-delta modulators for dual sinusoidal inputs

Altinok, Gunes and Al-Janabi, Mohammed and Kale, Izzet (2010) Stability predictions for higher-order band-pass sigma-delta modulators for dual sinusoidal inputs. In: Proceedings of the IEEE Instrumentation and Measurement Technology Conference, Texas, USA, May 3-6 2010 (I3MTC 2010). IEEE, pp. 541-545. ISBN 9781424428328

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Official URL: http://dx.doi.org/10.1109/IMTC.2010.5488138

Abstract

The stability boundaries of higher-order Band-Pass (BP) Σ-Δ modulators for dual sinusoidal inputs based on a combination of the Describing Function (DF) method and the quasi-linear modeling of the quantizer are determined in this paper. Closed form mathematical expressions are derived for the stability curves for different quantizer gain values. The stability prediction for the maximum stable input limits for eighth- and tenth-order Type-II-Chebyshev-based BP Σ-Δ modulators for different stop-band attenuations and bandwidths are established. The theoretical results are shown to be in good agreement with the simulation results for different input amplitudes and modulator orders. The proposed mathematical models of the quantizer will immensely help in speeding up the design of higher order BP Σ-Δ modulators.

Item Type:Book Section
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:7411
Deposited On:29 Jan 2010 10:57
Last Modified:26 Jul 2010 11:06

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