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A method for simulating a flux-locked DC SQUIDThe authors describe a computationally efficient and accurate method for simulating a dc SQUID's V-Phi (voltage-flux) and I-V characteristics which has proven valuable in evaluating and improving various SQUID readout methods. The simulation of the SQUID is based on fitting of previously acquired data from either a real or a modeled device using the Fourier transform of the V-Phi curve. This method does not predict SQUID behavior, but rather is a way of replicating a known behavior efficiently with portability into various simulation programs such as SPICE. The authors discuss the methods used to simulate the SQUID and the flux-locking control electronics, and present specific examples of this approach. Results include an estimate of the slew rate and linearity of a simple flux-locked loop using a characterized dc SQUID.
Document ID
19930060618
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gutt, G. M.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Kasdin, N. J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Condron, M. R., II
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Muhlfelder, B.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Lockhart, J. M.
(Stanford Univ. CA, United States)
Cromar, M. W.
(NIST Boulder, CO, United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1993
Publication Information
Publication: IEEE Transactions on Applied Superconductivity
Volume: 3
Issue: 1 pt
ISSN: 1051-8223
Subject Category
Electronics And Electrical Engineering
Accession Number
93A44615
Funding Number(s)
CONTRACT_GRANT: NAS8-36125
Distribution Limits
Public
Copyright
Other

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