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Precision Measurements of AC Josephson Voltage Standard Operating Margins



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


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.
IEEE Transactions on Instrumentation and Measurement


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


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], (Accessed July 15, 2024)


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Created April 1, 2005, Updated February 19, 2017