Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/~INS/2010CalWorkshop/loose.pdf Дата изменения: Mon Apr 23 22:58:46 2012 Дата индексирования: Sat Mar 1 14:24:13 2014 Кодировка: Поисковые слова: reflection nebula

The 2010 STScI Calibration Workshop Space Telescope Science Institute, 2010 Susana Deustua and Cristina Oliveira, eds.

Application of the SIDECAR ASIC as the Detector Controller for ACS and the JWST Near-IR Instruments
Markus Loose Markury Scientific Abstract. The SIDECAR ASIC is a fully integrated controller for high-p erformance optical and infrared detectors. It combines all functions on a single microchip, including output signal amplification and A/D conversion, bias voltage generation, clock generation, and housekeeping telemetry. The SIDECAR ASIC has b een implemented into the CCD electronics b ox for ACS (during the SM4 repair of the instrument), and it is built into all of the JWST near-infrared instruments. The presentation will give a brief overview of the core capabilities and features of the SIDECAR ASIC, and then focus on the p erformance and op erational asp ects relevant to HST/ACS and JWST. Challenges with resp ect to 1/f noise on the bias voltages and overall strategies for further noise reduction will b e discussed. In particular with resp ect to JWST, flexible data acquisition modes combined with elab orate p ost-processing have shown to provide significant noise improvements over the baseline approach. In this context, the full in-system programmability (even on-orbit) provides a valuable tool to adapt the op eration and configuration of the SIDECAR ASIC to changing conditions.

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