High-resolution superconducting single-flux quantum comparator for sub-Kelvin temperatures

Juha Hassel, Leif Grönberg, Panu Helistö, A. M. Savin, J.P. Pekola, A. Kidiyarova-Shevchenko, T. Holmqvist

    Research output: Contribution to journalArticleScientificpeer-review

    19 Citations (Scopus)


    A design of sub-Kelvin single-flux quantum (SFQ) circuits with reduced power dissipation and additional cooling of shunt resistors has been developed and characterized. The authors demonstrate operation of SFQ comparators with current resolution of 40nA at 2GHz sampling rate. Due to improved cooling the electron temperature in shunt resistors of a SFQ comparator is below 50mK when the bath temperature is about 30mK.
    Original languageEnglish
    Pages (from-to)133505
    JournalApplied Physics Letters
    Issue number13
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed


    • superconducting junction devices
    • Josephson junction
    • Josephson junction arrays
    • current comparators
    • resistors
    • cooling
    • electrical conductivity


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