Noise studies of uncoupled DC-SQUIDs

Tapani Ryhänen, Heikki Seppä, Robin Cantor, Dietmar Drung, Hans Koch, D. Veldhuis

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    We have performed noise measurements of uncoupled dc SQUIDs with similar square washer geometries. Mappings consisting of hundreds of flux noise measurements at different points of operation have been carried out using a dc SQUID preamplifier and a computer controlled measurement system. The white and low frequency noise, dynamic resistance, and the flux-to-volt age transfer function have been measured. The dc SQUID noise performance is described using equivalent current noise sources, and the voltage noise is observed to be linearly proportional to dynamic resistance Rdyn.
    Original languageEnglish
    Title of host publicationSuperconducting Devices and Their Applications
    EditorsHans Koch, Heinz Lübbig
    Place of PublicationHeidelberg
    ISBN (Electronic)978-3-642-77457-7
    ISBN (Print)978-3-642-77459-1
    Publication statusPublished - 1992
    MoE publication typeA4 Article in a conference publication
    Event4th International Conference SQUID ’91 - Berlin, Germany
    Duration: 18 Jun 199221 Jun 1992

    Publication series

    SeriesSpringer Proceedings in Physics


    Conference4th International Conference SQUID ’91

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  • Cite this

    Ryhänen, T., Seppä, H., Cantor, R., Drung, D., Koch, H., & Veldhuis, D. (1992). Noise studies of uncoupled DC-SQUIDs. In H. Koch, & H. Lübbig (Eds.), Superconducting Devices and Their Applications (pp. 321-325). Springer. Springer Proceedings in Physics, Vol.. 64