Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasp..108.1028h&link_type=abstract
Publications of the Astronomical Society of the Pacific, v.108, p.1028-1032
Astronomy and Astrophysics
Astronomy
Instrumentation: Detectors
Scientific paper
The areas of available optical detectors are too small for large imaging formats, such as telescope focal planes. One way to obtain large detector areas is to assemble mosaics of CCDs. Parallel driving of many CCDs rules out the possibility of individual tuning; however, such optimization is important, when the ultimate low light-level performance is required, particular for new, or mixed devices. In this work, an entirely novel approach, wherethe drive waveforms are multiplexed and interleaved, is described. This method reduces the number of leadout connections and permits individual device optimization. The controller basically comprises one memory device plus one PLD (Programmable Logic Device) where most of the logic is integrated, minimizing the chip count and improving the efficient of the system greatly. The system software has a flexible architecture for tailoring to specific operation modes and readout modes. The controller design can handle a mixture of CCD types in any geometric format. The laboratory prototype has been integrated and demonstrated. (SECTION: Astronomical Instrumentation)
Clayton Martin J.
Han Wonyong
Walker David D.
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