{"title":"A 6 GHz low-noise quadrature Colpitts VCO","authors":"M. Chu, D. Allstot","doi":"10.1109/ICECS.2004.1399604","DOIUrl":null,"url":null,"abstract":"A 6 GHz low-noise quadrature Colpitts VCO is presented. Use of the Colpitts configuration together with a series-injection scheme for quadrature signal generation ensures low phase noise operation. The QVCO achieves a simulated average phase noise of -140.5 dBc/Hz at 3 MHz offset across a 500 MHz tuning range while dissipating 20 mW of power. The 500 MHz tuning capability is obtained using switched capacitor arrays and accumulation-mode NMOS varactors. The phase error of the QVCO is 0.55/spl deg/. The figure-of-merit (FOM) and the power-frequency-tuning normalized FOM (PFTN-FOM) are 194 dB and -2 dB, respectively.","PeriodicalId":38467,"journal":{"name":"Giornale di Storia Costituzionale","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2004-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"15","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Giornale di Storia Costituzionale","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICECS.2004.1399604","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Arts and Humanities","Score":null,"Total":0}
引用次数: 15
Abstract
A 6 GHz low-noise quadrature Colpitts VCO is presented. Use of the Colpitts configuration together with a series-injection scheme for quadrature signal generation ensures low phase noise operation. The QVCO achieves a simulated average phase noise of -140.5 dBc/Hz at 3 MHz offset across a 500 MHz tuning range while dissipating 20 mW of power. The 500 MHz tuning capability is obtained using switched capacitor arrays and accumulation-mode NMOS varactors. The phase error of the QVCO is 0.55/spl deg/. The figure-of-merit (FOM) and the power-frequency-tuning normalized FOM (PFTN-FOM) are 194 dB and -2 dB, respectively.
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