Hamilton, C.
, Burroughs, C.
, Benz, S.
and Kinard Jr., J.
(1997),
AC Josephson Voltage Standard: Progress Report, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=15412
(Accessed February 11, 2025)
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AC Josephson Voltage Standard: Progress Report
Published
Author(s)
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Abstract
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.Citation
IEEE Transactions on Instrumentation and Measurement
Volume
46
Issue
2
Pub Type
Journals
Download Paper
Keywords
AC, digital-to-analog converter, Josephson, standard, voltage, waveform synthesis
Citation
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Created March 31, 1997, Updated October 12, 2021