Design of H-infinity correction filters for cascaded sigma delta modulators

被引:0
|
作者
Gani, MR [1 ]
机构
[1] Univ London Kings Coll, Dept Elect Engn, London WC2R 2LS, England
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中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper we propose a robust correction scheme to tackle the well known problem of analog mismatch errors encountered in cascaded sigma delta modulators. The problem is cast in an H-infinity setting and solved using standard robust control tools. Guaranteed worst case performance is obtained and implementation overhead is minimised. The approach is developed for the 1-1-1 cascaded architecture and results are provided for the slightly simpler 2-1 cascade scheme.
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页码:76 / 79
页数:4
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