{"title":"Piece-wise parabolic interpolation for direct digital frequency synthesis","authors":"A. Eltawil, B. Daneshrad","doi":"10.1109/CICC.2002.1012856","DOIUrl":null,"url":null,"abstract":"In this paper, a compact architecture and implementation for direct digital frequency synthesis (DDFS) is presented. It uses a smaller lookup table for sinusoidal functions compared to existing architectures. The computation of the sinusoidal values is performed by a parabolic interpolation structure, thus only interpolation coefficients need to be stored in the read-only memory (ROM). The ROM size is consistently less than 1 Kbit for SFDR values up to 85 dBc.","PeriodicalId":209025,"journal":{"name":"Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285)","volume":"280 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the IEEE 2002 Custom Integrated Circuits Conference (Cat. No.02CH37285)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CICC.2002.1012856","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
Abstract
In this paper, a compact architecture and implementation for direct digital frequency synthesis (DDFS) is presented. It uses a smaller lookup table for sinusoidal functions compared to existing architectures. The computation of the sinusoidal values is performed by a parabolic interpolation structure, thus only interpolation coefficients need to be stored in the read-only memory (ROM). The ROM size is consistently less than 1 Kbit for SFDR values up to 85 dBc.
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