A heat balanced sigma-delta uncooled bolometer

This paper describes a heat balanced bolometer with an integrated CMOS sigma-delta interface. The sigma-delta interface accomplishes both the analogue-to-digital conversion and the heat feedback and therefore no other digital core is required. The heat feedback is implemented using a capacitively co...

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Bibliographic Details
Published in:Measurement science & technology 2014-06, Vol.25 (6), p.65101
Main Authors: Denoual, M, Brouard, D, Veith, A, De Sagazan, O, Pouliquen, M, Attia, P, Lebrasseur, E, Mita, Y, Allègre, G
Format: Article
Language:English
Subjects:
digital electrical substitution
Electronics
Engineering Sciences
heat balanced
sigma-delta interface
uncooled bolometer
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Summary:This paper describes a heat balanced bolometer with an integrated CMOS sigma-delta interface. The sigma-delta interface accomplishes both the analogue-to-digital conversion and the heat feedback and therefore no other digital core is required. The heat feedback is implemented using a capacitively coupled electrical substitution technique with a digitally modulated signal that enables feedback linearization. Proof of concept is experimentally demonstrated with a polymer-type resistive bolometer and infrared optical source.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/25/6/065101