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10 Volt Automated Direct Comparison of Two Cryocooled Programmable Josephson Voltage Standards



Alain Rufenacht, Yi-hua D. Tang, Paul Dresselhaus, Charles J. Burroughs, Robert E. Schwall, Samuel P. Benz


We have performed direct dc comparisons between two cryocooled 10 V programmable Josephson voltage standards utilizing an automated synchronization scheme for the voltage reversals, which enables the use of a high sensitivity null detector on its 3 µV range by preventing any overload condition. No switches or manual operations are necessary to protect the null detector. Comparing the two systems under various test conditions provides robust verification of ideal system performance, and enables verification of the key components of the uncertainty budget for both the measurement methods and system operations.
Conference Dates
July 10-15, 2016
Conference Location
Ottawa, CA
Conference Title
Conference on Precision Electromagnetic Measurements


Josephson arrays, precision measurements, uncertainty, voltage measurement.


Rufenacht, A. , Tang, Y. , Dresselhaus, P. , Burroughs, C. , Schwall, R. and Benz, S. (2016), 10 Volt Automated Direct Comparison of Two Cryocooled Programmable Josephson Voltage Standards, Conference on Precision Electromagnetic Measurements, Ottawa, CA, [online],, (Accessed July 22, 2024)


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Created July 9, 2016, Updated April 4, 2022