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Precision Measurements of AC Josephson Voltage Standard Operating Margins

Published

Author(s)

Charles J. Burroughs, Samuel P. Benz, Paul D. Dresselhaus, Yonuk Chong

Abstract

Recent advances in circuit design and fabrication of superconducting integrated circuits have enabled us to demonstrate an ac Josephson voltage standard (ACJVS) that generates both ac and dc waveforms up to 242mV peak voltage. Using a Fast Fourier Transform spectrum analyzer and an ac/dc transfer standard, we characterize ACJVS operating margins by performing 'flat-spot' measurements at level of a part in 10^6^ for all eight bias parameters. By verifying that every bias parameter has a "flat-spot" (i.e., a range of bias values over which the measured ACJVS output is precicely constant), we demonstrate that all Josephson junctions on the chip are operating properly.
Citation
IEEE Transactions on Instrumentation and Measurement
Volume
54
Issue
2

Keywords

AC measurements, AC voltage standard, Josephson arrays, Josephson devices

Citation

Burroughs, C. , Benz, S. , Dresselhaus, P. and Chong, Y. (2005), Precision Measurements of AC Josephson Voltage Standard Operating Margins, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31615 (Accessed July 15, 2024)

Issues

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Created April 1, 2005, Updated February 19, 2017