journal6 ›› 2012, Vol. 33 ›› Issue (2): 72-77.DOI: 10.3969/j.issn.1007-2985.2012.02.017

• Information and Engineering • Previous Articles     Next Articles

Sliding Mode Circuit Design of High-Order Σ-Δ  Modulators


  1. (College of Information Science and Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2012-03-25 Published:2012-05-28

Abstract: A novel sliding mode circuit approach for implementing  high-order Σ-Δ modulators is proposed in this paper.Firstly,the Σ-Δ modulating coding function is prooved,and then the stability criterion of transfer function for high-order  Σ-Δ modulators is deduced.Secondly,the stability design algorithm of transfer function using the deduced criterion,Butterworth poles and zeros optimization is introduced.Finally,the circuit implementation of  Σ-Δ  modulators with cascading loop-filters is completed by using the solution of parameter equations and simulation modifications.A design example and simulation results verify that the proposed method is feasible.

Key words: sliding control;Σ-Δ , modulator;loop filter

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