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A Double Flux Locked Loop Scheme For SQUID Readout Of TES Detector Arrays Using The FDM Technique.
- Source :
-
AIP Conference Proceedings . 12/16/2009, Vol. 1185 Issue 1, p522-525. 4p. - Publication Year :
- 2009
-
Abstract
- SQUIDs readout electronics for TES microcalorimeters are generally based on the standard Flux Locked Loop scheme in which the SQUID is inserted in a feedback circuit in order to increase its Dynamic Range. For those applications in which a high loop gain at high frequency is needed, such as FDM multiplexing of a large number of pixels, the distance between the SQUID and room temperature electronics limits the performances due to the finite propagation time of the signal. Here we present a solution in which the feedback electronics is located in the cryogenic environment as close as possible to the SQUID. In particular we adopt a scheme in which the feedback loop is split in two paths: a high frequency FLL loop in cryogenic environment and a low frequency loop which is closed at room temperature. With this approach it is not necessary to have a precision DC amplifier working at cryogenic temperatures, resulting in a substantial simplification of the cryogenic components of the electronics. This paper describes the theory behind and the experimental work which is currently carried out to prove this concept. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CALORIMETERS
*DETECTORS
*ELECTRIC circuits
*CRYOELECTRONICS
*ELECTRONIC feedback
Subjects
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1185
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 47200615
- Full Text :
- https://doi.org/10.1063/1.3292394