%0 Journal Article
%T Sigma-Delta 调制器的建模、分析和设计
%A 葛彬杰
%A 王新安
%A 张兴
%A 冯晓星
%A 汪清勤
%J 半导体学报
%D 2010
%I 
%X This paper introduces a new method for SC sigma–delta modulator modeling. It studies the integrator's different equivalent circuits in the integrating and sampling phases. This model uses the OP-AMP input pair's tail current (I0) and overdrive voltage (von) as variables. The modulator's static and dynamic errors are analyzed. A group of optimized I0 and von for maximum SNR and power × area ratio can be obtained through this model. As examples, a MASH21 modulator for digital audio and a second order modulator for RFID baseband are implemented and tested, and they can achieve 91 dB and 72 dB respectively, which verifies the modeling and design criteria.
%K sigma-delta
%K 建模
%K 瞬态响应
%K 优化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=025C8057C4D37C4BA0041DC7DE7C758F&aid=30DD6BB8CF31F1CB976A181934A618BD&yid=140ECF96957D60B2&vid=4AD960B5AD2D111A&iid=9CF7A0430CBB2DFD&sid=2D55376FFF22940C&eid=94C357A881DFC066&journal_id=1674-4926&journal_name=半导体学报&referenced_num=0&reference_num=0