Readout Techniques for Drift and Low Frequency Noise Rejection in Infrared Arrays |
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| Authors: | Gert Finger Reinhold J Dorn Alan W Hoffman Hamid Mehrgan Manfred Meyer Alan F M Moorwood Joerg Stegmeier |
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| Institution: | (1) European Southern Observatory, USA;(2) Raytheon Infrared Operations, USA |
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| Abstract: | Three different methods are presented to subtract thermal drifts and low-frequency noise from the signal of infrared array.
The first is dead pixels with open Indium bumps, the second is reference output as implemented on the Hawaii2 multiplexer,
and the third is dark pixels to emulate reference cells having a capacity connected to the gate of the unit cell field-effect
transistor (FET). The third method is the most effective and yields a reduction in readout noise from15.4–9.4 erms. A novel
method will be described to extend this readout technique to the Aladdin 1 K × 1 K InSb array.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | HgCdTe infrared detector InSb noise readout techniques reference cell |
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