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Determination of Transition Error Corrections for Low Frequency Stepwise-Approximated Josephson Sine Waves

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4 Author(s)
Eklund, G. ; SP Tech. Res. Inst. of Sweden, Borås, Sweden ; Bergsten, T. ; Tarasso, V. ; Rydler, K.-E.

This paper describes high-accuracy low-frequency ac voltage measurements using a programmable Josephson voltage standard based on a binary Josephson array. AC voltage synthesis is performed by switching between quantized Josephson voltages. The accuracy of a synthesized Josephson ac voltage is limited by the transition error. We present an experimental method for determination of a correction for the transition error. The method is based on the assumption of a linear frequency dependence of the transition error. Measurements up to 1 kHz have been performed. Using the transition error correction at different frequencies has shown a frequency-independent Josephson ac voltage step width.

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:60 ,  Issue: 7 )

Date of Publication:

July 2011

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