The use of (double) relaxation oscillation SQUIDs as a sensor

M.J. van Duuren; G.C.S. Brons; H. Kattouw; Jakob Flokstra; Horst Rogalla

doi:10.1109/77.622139

The use of (double) relaxation oscillation SQUIDs as a sensor

M.J. van Duuren, G.C.S. Brons, H. Kattouw, Jakob Flokstra, Horst Rogalla

Faculty of Science and Technology

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

Relaxation Oscillation SQUIDs (ROSs) and Double Relaxation Oscillation SQUIDs (DROSs) are based on relaxation oscillations that are induced in hysteretic dc SQUIDs by an external L-R shunt. The relaxation frequency of a ROS varies with the applied flux Φ, whereas the output of a DROS is a dc voltage, with a typical flux-to-voltage transfer of ∂V/∂Φ≈1 mV/Φ0. The flux-to-frequency response of several ROSs has been measured and compared with theory for frequencies up to 7 GHz. Various DROS designs-a multi-loop direct coupling DROS, a DROS with a washer type signal SQUID and a DROS with gradiometric signal SQUID-will be discussed in this paper. The integration of a DROS with a digital flux locked loop (“Smart DROS”) will also be analyzed

Original language	Undefined
Pages (from-to)	3469-3472
Number of pages	4
Journal	IEEE transactions on applied superconductivity
Volume	7
Issue number	2
DOIs	https://doi.org/10.1109/77.622139
Publication status	Published - 1997

Keywords

METIS-129275
IR-24475

Access to Document

10.1109/77.622139

relaxation_oscillation_SQUIDs-duuren

Cite this

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title = "The use of (double) relaxation oscillation SQUIDs as a sensor",

abstract = "Relaxation Oscillation SQUIDs (ROSs) and Double Relaxation Oscillation SQUIDs (DROSs) are based on relaxation oscillations that are induced in hysteretic dc SQUIDs by an external L-R shunt. The relaxation frequency of a ROS varies with the applied flux Φ, whereas the output of a DROS is a dc voltage, with a typical flux-to-voltage transfer of ∂V/∂Φ≈1 mV/Φ0. The flux-to-frequency response of several ROSs has been measured and compared with theory for frequencies up to 7 GHz. Various DROS designs-a multi-loop direct coupling DROS, a DROS with a washer type signal SQUID and a DROS with gradiometric signal SQUID-will be discussed in this paper. The integration of a DROS with a digital flux locked loop (“Smart DROS”) will also be analyzed",

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T1 - The use of (double) relaxation oscillation SQUIDs as a sensor

AU - van Duuren, M.J.

AU - Brons, G.C.S.

AU - Kattouw, H.

AU - Flokstra, Jakob

AU - Rogalla, Horst

PY - 1997

Y1 - 1997

N2 - Relaxation Oscillation SQUIDs (ROSs) and Double Relaxation Oscillation SQUIDs (DROSs) are based on relaxation oscillations that are induced in hysteretic dc SQUIDs by an external L-R shunt. The relaxation frequency of a ROS varies with the applied flux Φ, whereas the output of a DROS is a dc voltage, with a typical flux-to-voltage transfer of ∂V/∂Φ≈1 mV/Φ0. The flux-to-frequency response of several ROSs has been measured and compared with theory for frequencies up to 7 GHz. Various DROS designs-a multi-loop direct coupling DROS, a DROS with a washer type signal SQUID and a DROS with gradiometric signal SQUID-will be discussed in this paper. The integration of a DROS with a digital flux locked loop (“Smart DROS”) will also be analyzed

AB - Relaxation Oscillation SQUIDs (ROSs) and Double Relaxation Oscillation SQUIDs (DROSs) are based on relaxation oscillations that are induced in hysteretic dc SQUIDs by an external L-R shunt. The relaxation frequency of a ROS varies with the applied flux Φ, whereas the output of a DROS is a dc voltage, with a typical flux-to-voltage transfer of ∂V/∂Φ≈1 mV/Φ0. The flux-to-frequency response of several ROSs has been measured and compared with theory for frequencies up to 7 GHz. Various DROS designs-a multi-loop direct coupling DROS, a DROS with a washer type signal SQUID and a DROS with gradiometric signal SQUID-will be discussed in this paper. The integration of a DROS with a digital flux locked loop (“Smart DROS”) will also be analyzed

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KW - IR-24475

U2 - 10.1109/77.622139

DO - 10.1109/77.622139

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