Effect of voltage bias on the dc SQUID characteristics

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    Abstract

    The dynamics of the dc SQUID, when voltage biased through an inductor, is computed by numerical simulation and by perturbative analytical calculation. We find that the dynamic resistance decreases from its current-biased value at low bias voltages, where the inductive series reactance no longer separates the Josephson voltage oscillation from the bias source. The flux-to-current conversion ratio, however, remains almost unaffected. This effect is sometimes important in setups, where a second SQUID is used as a readout amplifier.
    Original languageEnglish
    Pages (from-to)127-136
    Number of pages10
    JournalJournal of Low Temperature Physics
    Volume123
    Issue number1-2
    DOIs
    Publication statusPublished - 2001
    MoE publication typeA1 Journal article-refereed

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