A method for simulating a flux-locked DC SQUID

Author

Gutt, G.M. ; Kasdin, N.J. ; Condron, M.R., II ; Muhlfelder, B. ; Lockhart, J.M. ; Cromar, M.W.

Author_Institution

W.W. Hansen Exp. Phys. Lab., Stanford, CA, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1837

Lastpage

1840

Abstract

The authors describe a computationally efficient and accurate method for simulating a DC superconducting quantum interference device´s (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.<>

Keywords

SPICE; SQUIDs; circuit analysis computing; Fourier transform; I-V characteristics; SPICE; SQUID readout methods; flux-locked DC SQUID; flux-locking control electronics; linearity; simulation; slew rate; voltage flux characteristics; Computational modeling; Curve fitting; Fourier transforms; Interference; Predictive models; Quantum computing; SPICE; SQUIDs; Superconducting devices; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233324

Filename

233324