Optimization of a Josephson voltage array based on frequency dependently damped superconductor-insulator-superconductor junctions

Juha Hassel, Heikki Seppä, Leif Grönberg, Ilkka Suni

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    We have developed a programmable Josephson voltage standard based on an array of superconductor–insulator–superconductor junctions. The junctions are damped by an external frequency-dependent shunt circuit, which allows operation at Shapiro steps with n>1. We derive optimization criteria for the design parameters for a fast and stable array with low power consumption. An array able to generate 1.0 VRMS ac voltage signal with sub-ppm accuracy is experimentally demonstrated. Theoretically it is also shown that a fast programmable 10 V array can be realized.
    Original languageEnglish
    Pages (from-to)3510-3515
    Number of pages6
    JournalReview of Scientific Instruments
    Issue number7
    Publication statusPublished - 2003
    MoE publication typeA1 Journal article-refereed



    • superconductor-insulator-superconductor devices
    • measurement standards
    • voltage measurement
    • superconducting arrays
    • superconducting microwave devices
    • millimetre wave measurement
    • Josephson junction
    • Josephson junction arrays

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