Influence of the signal coil on DC-squid dynamics

Heikki Seppä, Tapani Ryhänen

    Research output: Contribution to journalArticleScientific

    9 Citations (Scopus)

    Abstract

    The dynamics of the dc-SQUID in the presence of a signal coil was studied. The signal coil creates an additive parasitic capacitance between the junctions and its self-resonance imports new features to the SQUID dynamics. Our results suggest that if a SQUID with smooth characteristics and low noise properties is desired, all the resonances present in the SQUID ring or in the flux coupling circuit should be damped properly. Low attenuation yields a system with high gain but with higher excess noise. On the other hand, heavy damping of the device yields low gain and a high noise level and thus a compromise is necessary.
    Original languageEnglish
    Pages (from-to)1083-1086
    JournalIEEE Transactions on Magnetics
    Volume23
    Issue number2
    DOIs
    Publication statusPublished - 1987
    MoE publication typeB1 Article in a scientific magazine

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    SQUIDs
    Coupled circuits
    Capacitance
    Damping
    Fluxes

    Cite this

    Seppä, Heikki ; Ryhänen, Tapani. / Influence of the signal coil on DC-squid dynamics. In: IEEE Transactions on Magnetics. 1987 ; Vol. 23, No. 2. pp. 1083-1086.
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    abstract = "The dynamics of the dc-SQUID in the presence of a signal coil was studied. The signal coil creates an additive parasitic capacitance between the junctions and its self-resonance imports new features to the SQUID dynamics. Our results suggest that if a SQUID with smooth characteristics and low noise properties is desired, all the resonances present in the SQUID ring or in the flux coupling circuit should be damped properly. Low attenuation yields a system with high gain but with higher excess noise. On the other hand, heavy damping of the device yields low gain and a high noise level and thus a compromise is necessary.",
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    Influence of the signal coil on DC-squid dynamics. / Seppä, Heikki; Ryhänen, Tapani.

    In: IEEE Transactions on Magnetics, Vol. 23, No. 2, 1987, p. 1083-1086.

    Research output: Contribution to journalArticleScientific

    TY - JOUR

    T1 - Influence of the signal coil on DC-squid dynamics

    AU - Seppä, Heikki

    AU - Ryhänen, Tapani

    PY - 1987

    Y1 - 1987

    N2 - The dynamics of the dc-SQUID in the presence of a signal coil was studied. The signal coil creates an additive parasitic capacitance between the junctions and its self-resonance imports new features to the SQUID dynamics. Our results suggest that if a SQUID with smooth characteristics and low noise properties is desired, all the resonances present in the SQUID ring or in the flux coupling circuit should be damped properly. Low attenuation yields a system with high gain but with higher excess noise. On the other hand, heavy damping of the device yields low gain and a high noise level and thus a compromise is necessary.

    AB - The dynamics of the dc-SQUID in the presence of a signal coil was studied. The signal coil creates an additive parasitic capacitance between the junctions and its self-resonance imports new features to the SQUID dynamics. Our results suggest that if a SQUID with smooth characteristics and low noise properties is desired, all the resonances present in the SQUID ring or in the flux coupling circuit should be damped properly. Low attenuation yields a system with high gain but with higher excess noise. On the other hand, heavy damping of the device yields low gain and a high noise level and thus a compromise is necessary.

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    DO - 10.1109/TMAG.1987.1065125

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    JO - IEEE Transactions on Magnetics

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