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Proceedings Paper

High-resolution digital readout for uncooled smart IR focal plane arrays
Author(s): Ulf Ringh; Christer Jansson; Kevin Charles Liddiard; Olaf Reinhold
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Paper 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.

Paper Details

Date Published: 14 November 1997
PDF: 6 pages
Proc. SPIE 3242, Smart Electronics and MEMS, (14 November 1997); doi: 10.1117/12.293565
Show Author Affiliations
Ulf Ringh, Defence Research Establishment (Sweden)
Christer Jansson, Defence Research Establishment (Sweden)
Kevin Charles Liddiard, Electro-optic Sensor Design (Australia)
Olaf Reinhold, Defence Science and Technology Organisation (Australia)

Published in SPIE Proceedings Vol. 3242:
Smart Electronics and MEMS
Alex Hariz; Vijay K. Varadan; Olaf Reinhold, Editor(s)

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