{"title":"采用约瑟夫森阻抗桥精确测量10∶1电容比","authors":"L. Palafox, R. Behr, J. Schurr, B. Kibble","doi":"10.1109/CPEM.2014.6898344","DOIUrl":null,"url":null,"abstract":"Josephson impedance bridges have been reported to provide uncertainties close to that from the best conventional bridges when comparing 1:1 impedance ratios. For a 10:1 capacitance ratio (100 pF to 10 pF) a type A uncertainty accuracy of a few parts in 107 has been achieved with 1-V programmable Josephson arrays. The accuracy can be significantly improved when using 10-V Josephson arrays. Preliminary measurements are also presented with type A uncertainties at the level of parts in 108 (k = 1).","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"Precision 10∶1 capacitance ratio measurement using a Josephson impedance bridge\",\"authors\":\"L. Palafox, R. Behr, J. Schurr, B. Kibble\",\"doi\":\"10.1109/CPEM.2014.6898344\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Josephson impedance bridges have been reported to provide uncertainties close to that from the best conventional bridges when comparing 1:1 impedance ratios. For a 10:1 capacitance ratio (100 pF to 10 pF) a type A uncertainty accuracy of a few parts in 107 has been achieved with 1-V programmable Josephson arrays. The accuracy can be significantly improved when using 10-V Josephson arrays. Preliminary measurements are also presented with type A uncertainties at the level of parts in 108 (k = 1).\",\"PeriodicalId\":256575,\"journal\":{\"name\":\"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)\",\"volume\":\"120 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-10-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/CPEM.2014.6898344\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CPEM.2014.6898344","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Precision 10∶1 capacitance ratio measurement using a Josephson impedance bridge
Josephson impedance bridges have been reported to provide uncertainties close to that from the best conventional bridges when comparing 1:1 impedance ratios. For a 10:1 capacitance ratio (100 pF to 10 pF) a type A uncertainty accuracy of a few parts in 107 has been achieved with 1-V programmable Josephson arrays. The accuracy can be significantly improved when using 10-V Josephson arrays. Preliminary measurements are also presented with type A uncertainties at the level of parts in 108 (k = 1).
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