{"title":"A 3.16 – 12.8GHz low phase noise N-Push/M-push cyclic coupled ring oscillator","authors":"Mohammed M. Abdul-Latif, E. Sánchez-Sinencio","doi":"10.1109/RFIC.2011.5940679","DOIUrl":null,"url":null,"abstract":"A topology for realizing wideband ring oscillators is introduced. Five three-stage ring oscillators operating over a frequency range of 1-2.56GHz are coupled using uni-lateral cyclic coupling. This provides phase shifted outputs which are combined twice in an N-Push or M-Push operation (N=3 and M=5) resulting in an output signal of 3.16-12.8GHz. This coupled structure improves phase noise by 10log10M=7dB producing -103.4 and -101.6 dBc/Hz at 1MHz offset for 3.16GHz and 12.8GHz, respectively. A prototype fabricated in 90nm CMOS consumes 13-200mW across the tuning range.","PeriodicalId":448165,"journal":{"name":"2011 IEEE Radio Frequency Integrated Circuits Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 IEEE Radio Frequency Integrated Circuits Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RFIC.2011.5940679","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
A topology for realizing wideband ring oscillators is introduced. Five three-stage ring oscillators operating over a frequency range of 1-2.56GHz are coupled using uni-lateral cyclic coupling. This provides phase shifted outputs which are combined twice in an N-Push or M-Push operation (N=3 and M=5) resulting in an output signal of 3.16-12.8GHz. This coupled structure improves phase noise by 10log10M=7dB producing -103.4 and -101.6 dBc/Hz at 1MHz offset for 3.16GHz and 12.8GHz, respectively. A prototype fabricated in 90nm CMOS consumes 13-200mW across the tuning range.
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