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14 November 1997 High-resolution digital readout for uncooled smart IR focal plane arrays
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Abstract
This paper discusses the development of a high resolution digital readout from a 2D array of uncooled IR detectors. The need for a high resolution analogue to digital converter (ADC) is described and anew concept is presented. Experimental VLSI arrays have been designed using 0.8 micrometers CMOS technology and the pixel size is 40 micrometers X 40 micrometers . The concept has been demonstrated by using 320 parallel 16 bit ADCs in a 320 X 240 readout array with a frame rate of 30 Hz. High linearity and low noise is obtained and the power consumption for each ADC is 0.5 mW. The high digital resolution allows for digital offset correction off the local plane. A 16 X 16 version of the readout circuit has been postprocessed with uncooled IR detectors. These are currently under evaluation.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ulf Ringh, Christer Jansson, Kevin Charles Liddiard, and Olaf Reinhold "High-resolution digital readout for uncooled smart IR focal plane arrays", Proc. SPIE 3242, Smart Electronics and MEMS, (14 November 1997); https://doi.org/10.1117/12.293565
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