Title :
Transfer function design of stable high-order sigma-delta modulators with root locus inside unit circle
Author :
Yang, Cheng-Chung ; Chen, Kuan-Dar ; Wang, Wen-Chyi ; Kuo, Tai-Haur
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
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.
Keywords :
circuit noise; circuit simulation; circuit stability; network synthesis; root loci; sigma-delta modulation; transfer functions; SDM stability/performance tradeoff; SDM transfer function design; noise-shaping function root locus departure angles; stable high-order sigma-delta modulators; unit circle enclosed root locus; Cities and towns; Delta-sigma modulation; Ear; Gain; H infinity control; Linear systems; Noise shaping; Signal to noise ratio; Stability analysis; Transfer functions;
Conference_Titel :
ASIC, 2002. Proceedings. 2002 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-7363-4
DOI :
10.1109/APASIC.2002.1031518
