{"title":"A fourth-order cascaded full feed-forward sigma-delta modulator","authors":"Qiang Lu, Xiaowei Liu","doi":"10.1109/ICOOM.2012.6316316","DOIUrl":null,"url":null,"abstract":"This paper presents a structure of a fourth-order cascaded full feed-forward Sigma-delta modulator. Because there is no feedback but only feed-forward path between two stages, cascaded sigma-delta modulator is unnecessary to consider the stability problems, and has the identical performance with ideal high-order single-loop sigma-delta modulator. The system level simulation results show that the signal to noise rate (SNR) of the designed sigma-delta modulator is 148 and the effective number of bits (ENOB) is 24.4 when the oversampling ratio (OSR) is 128.","PeriodicalId":129625,"journal":{"name":"2012 International Conference on Optoelectronics and Microelectronics","volume":"35 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2012 International Conference on Optoelectronics and Microelectronics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICOOM.2012.6316316","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
This paper presents a structure of a fourth-order cascaded full feed-forward Sigma-delta modulator. Because there is no feedback but only feed-forward path between two stages, cascaded sigma-delta modulator is unnecessary to consider the stability problems, and has the identical performance with ideal high-order single-loop sigma-delta modulator. The system level simulation results show that the signal to noise rate (SNR) of the designed sigma-delta modulator is 148 and the effective number of bits (ENOB) is 24.4 when the oversampling ratio (OSR) is 128.
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