{"title":"电容耦合变容压控振荡器研究闪烁噪声上转换机理","authors":"N. Itoh","doi":"10.1109/RFIT.2005.1598899","DOIUrl":null,"url":null,"abstract":"CCV-VCO (capacitor-coupled varactor VCO) has been studied with a view to suppressing flicker noise up-conversion. The mechanisms of flicker noise up-conversion to f/sup 3/ phase noise utilize three paths; direct modulation, folding by non-linearity of oscillation, and tail current up-conversion at common node. Designed NMOS-VCO satisfied to avoid f/sup 3/ phase noise by direct modulation pass. Measured phase noise at 10 kHz offset from carrier was -74 dBc/Hz at 2.9 GHz oscillation frequency, and the corner frequency between f/sup 3/ phase noise and f/sup 2/ phase noise was approximately 20 kHz. The current consumption was 6 mA with 1.8 V. The 1 MHz FOM of VCO was 182 dB and 10 kHz FOM of VCO was 173 dB.","PeriodicalId":337918,"journal":{"name":"2005 IEEE International Wkshp on Radio-Frequency Integration Technology: Integrated Circuits for Wideband Comm & Wireless Sensor Networks","volume":"79 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":"{\"title\":\"A study of capacitor-coupled varactor VCO to investigate flicker noise up-conversion mechanism\",\"authors\":\"N. Itoh\",\"doi\":\"10.1109/RFIT.2005.1598899\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"CCV-VCO (capacitor-coupled varactor VCO) has been studied with a view to suppressing flicker noise up-conversion. The mechanisms of flicker noise up-conversion to f/sup 3/ phase noise utilize three paths; direct modulation, folding by non-linearity of oscillation, and tail current up-conversion at common node. Designed NMOS-VCO satisfied to avoid f/sup 3/ phase noise by direct modulation pass. Measured phase noise at 10 kHz offset from carrier was -74 dBc/Hz at 2.9 GHz oscillation frequency, and the corner frequency between f/sup 3/ phase noise and f/sup 2/ phase noise was approximately 20 kHz. The current consumption was 6 mA with 1.8 V. The 1 MHz FOM of VCO was 182 dB and 10 kHz FOM of VCO was 173 dB.\",\"PeriodicalId\":337918,\"journal\":{\"name\":\"2005 IEEE International Wkshp on Radio-Frequency Integration Technology: Integrated Circuits for Wideband Comm & Wireless Sensor Networks\",\"volume\":\"79 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2005 IEEE International Wkshp on Radio-Frequency Integration Technology: Integrated Circuits for Wideband Comm & Wireless Sensor Networks\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/RFIT.2005.1598899\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2005 IEEE International Wkshp on Radio-Frequency Integration Technology: Integrated Circuits for Wideband Comm & Wireless Sensor Networks","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RFIT.2005.1598899","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A study of capacitor-coupled varactor VCO to investigate flicker noise up-conversion mechanism
CCV-VCO (capacitor-coupled varactor VCO) has been studied with a view to suppressing flicker noise up-conversion. The mechanisms of flicker noise up-conversion to f/sup 3/ phase noise utilize three paths; direct modulation, folding by non-linearity of oscillation, and tail current up-conversion at common node. Designed NMOS-VCO satisfied to avoid f/sup 3/ phase noise by direct modulation pass. Measured phase noise at 10 kHz offset from carrier was -74 dBc/Hz at 2.9 GHz oscillation frequency, and the corner frequency between f/sup 3/ phase noise and f/sup 2/ phase noise was approximately 20 kHz. The current consumption was 6 mA with 1.8 V. The 1 MHz FOM of VCO was 182 dB and 10 kHz FOM of VCO was 173 dB.
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