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AC Josephson Voltage Standard: Progress Report



Clark A. Hamilton, Charles J. Burroughs, Samuel Benz, Joseph R. Kinard Jr.


Progress toward a Josephson voltage standard for fast dc measurements and accurate ac waveform systhesis is described. A superconductor-normal-superconductor (SNS) junction process is used to make 5 mA critical current arrays with up to 32 768 junctions. With rf excitation at 11 GHz these arrays generate milliampere constant-voltage steps. A bias control circuit that provides output current amplication, transient suppression, and submicrosecond settling time is used with both superconductor-insulator-superconductor (SIS) and SNS junction arrays for fast, automated measurements of A/D converter linearity, a test for subnanovolt accuracy, waveform synthesis, and a preliminary measurement of the ac-dc difference of a thermal voltage converter.
IEEE Transactions on Instrumentation and Measurement


AC, digital-to-analog converter, Josephson, standard, voltage, waveform synthesis


Hamilton, C. , Burroughs, C. , Benz, S. and Kinard Jr., J. (1997), AC Josephson Voltage Standard: Progress Report, IEEE Transactions on Instrumentation and Measurement, [online], (Accessed July 15, 2024)


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Created March 31, 1997, Updated October 12, 2021