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Proceedings Paper

A low-noise readout circuit in 0.35-µm CMOS for low-cost uncooled FPA infrared network camera
Author(s): Behzad Mesgarzadeh; M. Reza Sadeghifar; Per Fredriksson; Christer Jansson; Frank Niklaus; Atila Alvandpour
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Paper Abstract

This paper describes a differential readout circuit technique for uncooled Infrared Focal Plane Arrays (IRFPA) sensors. The differential operation allows an efficient rejection of the common-mode noise during the biasing and readout of the detectors. This has been enabled by utilizing a number of blind and thermally-isolated IR bolometers as reference detectors. In addition, a pixel-wise detector calibration capability has been provided in order to allow efficient error corrections using digital signal processing techniques. The readout circuit for a 64×64 test bolometer-array has been designed in a standard 0.35-μm CMOS process. Circuit simulations show that the analog readout at 60 frames/s consumes 30 mW from a 3.3-V supply and results in a noise equivalent temperature difference (NETD) of 125 mK for infrared optics.

Paper Details

Date Published: 6 May 2009
PDF: 8 pages
Proc. SPIE 7298, Infrared Technology and Applications XXXV, 72982F (6 May 2009); doi: 10.1117/12.819826
Show Author Affiliations
Behzad Mesgarzadeh, Linköping Univ. (Sweden)
M. Reza Sadeghifar, Linköping Univ. (Sweden)
Per Fredriksson, Linköping Univ. (Sweden)
Christer Jansson, Linköping Univ. (Sweden)
FAUN AB (Sweden)
Frank Niklaus, FAUN AB (Sweden)
Atila Alvandpour, Linköping Univ. (Sweden)

Published in SPIE Proceedings Vol. 7298:
Infrared Technology and Applications XXXV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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