Transfer function design of stable high-order sigma-delta modulators with root locus inside unit circle
Proceedings. IEEE Asia-Pacific Conference on ASIC,（2002）
摘要
In this paper, a systematic method to design stable high-order sigma-delta modulator (SDM) transfer functions, with no need of stability mechanisms, is proposed. It is shown that a high-order SDM can be absolutely stable if the departure angles of the root locus of its noise-shaping function are properly designed. Tradeoffs between stability and performance of the SDMs are presented.
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关键词
network synthesis,sigma-delta modulation,sdm transfer function design,unit circle enclosed root locus,transfer functions,circuit noise,root loci,stable high-order sigma-delta modulators,circuit stability,noise-shaping function root locus departure angles,sdm stability/performance tradeoff,circuit simulation,delta sigma modulation,noise shaping,linear systems,signal to noise ratio,stability analysis,sigma delta modulator,gain,transfer function
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