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Baseband feedback for SAFARI-SPICA using Frequency Domain Multiplexing

  • P. Kern, A. Bounab (a1), P. de Korte (a2), A. Cros (a1), J. van der Kuur (a2), B.J. van Leeuwen (a2), B. Monna (a3), R. Mossel (a2), A. Nieuwenhuizen (a2) and L. Ravera (a1)...

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.

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[1] Drung, D., 2002, Physica C, 368, 134, 140
[2] Mauskopf, P., 2008, Proc. SPIE, 7020, 70200N
[3] Nakagawa, T., 2004, Adv. Space Res. 34, 645, 650
[4] Swinyard, B., 2008, Society of Photo-Optical Instrumentation Engineers
[5] Van der Kuur, J., De Korte, P., 2004, Nucl. Instr. Meth. Phys. Res. A, 520, 554

Baseband feedback for SAFARI-SPICA using Frequency Domain Multiplexing

  • P. Kern, A. Bounab (a1), P. de Korte (a2), A. Cros (a1), J. van der Kuur (a2), B.J. van Leeuwen (a2), B. Monna (a3), R. Mossel (a2), A. Nieuwenhuizen (a2) and L. Ravera (a1)...

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