Baseband feedback for SAFARI-SPICA using Frequency Domain Multiplexing

A. Bounab; P. de Korte; A. Cros; J. van der Kuur; B.J. van Leeuwen; B. Monna; R. Mossel; A. Nieuwenhuizen; L. Ravera

doi:10.1051/eas/0937012

Issue		EAS Publications Series Volume 37, 2009 Astrophysics Detector Workshop 2008


Page(s)		101 - 106
DOI		https://doi.org/10.1051/eas/0937012
Published online		11 June 2009

Astrophysics Detector Workshop 2008
P. Kern (ed)
EAS Publications Series, 37 (2009) 101-106

Baseband feedback for SAFARI-SPICA using Frequency Domain Multiplexing

A. Bounab¹, P. de Korte², A. Cros¹, J. van der Kuur², B.J. van Leeuwen², B. Monna³, R. Mossel², A. Nieuwenhuizen² and L. Ravera¹

¹ CESR, CNRS-Université de Toulouse, France
² SRON, Utrecht, The Netherlands
³ Systematic, The Netherlands

Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

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 t_d, 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.