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Frequency Uncertainty Analysis for Josephson Voltage Standard



Yi-hua D. Tang, Michael A. Lombardi, David A. Howe


The uncertainty in voltage measurement in a Josephson voltage standard (JVS) is proportional to the uncertainty of frequency measurement. The 10 MHz time-base from various commonly used frequency standards for JVS are analyzed using Allan variance to determine the contribution to the uncertainty budget for voltage measurement. The 75 GHz microwave source along with phase-lock electronics and frequency counter for a Josephson junction array is also analyzed for its stability and contribution to JVS uncertainty budget. The results provide realistic estimation for uncertainty contributions of time base and frequency measurements in JVS.
Proceedings Title
CPEM Digest
Conference Dates
June 27-July 2, 2004
Conference Location
London, 1, UK
Conference Title
Conference on Precision Electromagnetic Measurements


Allan variance, frequency standard, Josephson voltage standard, uncertainty


Tang, Y. , Lombardi, M. and Howe, D. (2004), Frequency Uncertainty Analysis for Josephson Voltage Standard, CPEM Digest, London, 1, UK, [online], (Accessed April 22, 2024)
Created May 31, 2004, Updated October 12, 2021