A low-noise readout circuit in 0.35-µm CMOS for low-cost uncooled FPA infrared network camera

Behzad Mesgarzadeh; M. Reza Sadeghifar; Per Fredriksson; Christer Jansson; Frank Niklaus; Atila Alvandpour

doi:10.1117/12.819826

6 May 2009 A low-noise readout circuit in 0.35-μm CMOS for low-cost uncooled FPA infrared network camera

Behzad Mesgarzadeh, M. Reza Sadeghifar, Per Fredriksson, Christer Jansson, Frank Niklaus, Atila Alvandpour

Proceedings Volume 7298, Infrared Technology and Applications XXXV; 72982F (2009) https://doi.org/10.1117/12.819826
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

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.

Citation Download Citation

Behzad Mesgarzadeh, M. Reza Sadeghifar, Per Fredriksson, Christer Jansson, Frank Niklaus, and Atila Alvandpour "A low-noise readout circuit in 0.35-μm CMOS for low-cost uncooled FPA infrared network camera", Proc. SPIE 7298, Infrared Technology and Applications XXXV, 72982F (6 May 2009); https://doi.org/10.1117/12.819826

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