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Josephson-Based Full Digital Bridge for High-Accuracy Impedance Comparisons



Frederic Overney, Nathan Flowers-Jacobs, Blaise Jeanneret, Alain Rufenacht, Anna Fox, Jason Underwood, Andrew D. Koffman, Samuel P. Benz


This paper describes a Josephson-based impedance bridge capable of comparing any types of impedance over a large bandwidth. The heart of the bridge is a dual AC Josephson Voltage Standards (ACJVS) source which offers unprecedented flexibility in high-precision impedance calibration (i.e. calibration at arbitrary ratios and phase angles) allowing full coverage of the complex plane using a single bridge.
Conference Dates
July 10-15, 2016
Conference Location
Ottawa, CA
Conference Title
Conference on Precision Electromagnetic Measurements


Impedance comparison, ac coaxial bridge, AC Josephson voltage standard, digital bridge.


Overney, F. , Flowers-Jacobs, N. , Jeanneret, B. , Rufenacht, A. , Fox, A. , Underwood, J. , Koffman, A. and Benz, S. (2016), Josephson-Based Full Digital Bridge for High-Accuracy Impedance Comparisons, Conference on Precision Electromagnetic Measurements, Ottawa, CA, [online],, (Accessed June 18, 2024)


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Created July 9, 2016, Updated April 18, 2022