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Baseband feedback for SAFARI-SPICA using Frequency Domain Multiplexing

Published online by Cambridge University Press:  11 June 2009

P. Kern ,
A. Bounab ,
P. de Korte ,
A. Cros ,
J. van der Kuur ,
B.J. van Leeuwen ,
B. Monna ,
R. Mossel ,
A. Nieuwenhuizen  and
L. Ravera
A. Bounab*
Affiliation:
CESR, CNRS-Université de Toulouse, France
P. de Korte
Affiliation:
SRON, Utrecht, The Netherlands
A. Cros
Affiliation:
CESR, CNRS-Université de Toulouse, France
J. van der Kuur
Affiliation:
SRON, Utrecht, The Netherlands
B.J. van Leeuwen
Affiliation:
SRON, Utrecht, The Netherlands
B. Monna
Affiliation:
Systematic, The Netherlands
R. Mossel
Affiliation:
SRON, Utrecht, The Netherlands
A. Nieuwenhuizen
Affiliation:
SRON, Utrecht, The Netherlands
L. Ravera
Affiliation:
CESR, CNRS-Université de Toulouse, France
*
[email protected]
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Abstract

We report on the performance of the digital baseband feedback circuit developed to readout and process signals from arrays of transition edge sensors for SPICA-SAFARI in frequency domain multiplexing (FDM). The standard procedure to readout the SQUID current amplifiers is to use a feedback loop (flux-locked loop: FLL). However the achievable FFL bandwidth is limited by the cable transport delay td, which makes standard feedback inconvenient. A much better approach is to use baseband feedback. We have developed a model of the electronic readout chain for SPICA-SAFARI instrument by using an Anlog-digital co-simulation based on Simulink-System Generator environment.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 37: Astrophysics Detector Workshop 2008 , 2009 , pp. 101 - 106
Copyright
© EAS, EDP Sciences, 2009

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References

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