A low-noise readout circuit in 0.35-μm CMOS for low-cost uncooled FPA infrared network camera
2009 (English)In: Proceedings of SPIE - The International Society for Optical Engineering, vol 7298, SPIE - International Society for Optical Engineering, 2009, Vol. 7298, 72982F- p.Conference paper (Refereed)
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 f/1 infrared optics.
Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2009. Vol. 7298, 72982F- p.
, Proceedings of SPIE, the International Society for Optical Engineering, ISSN 0277-786X ; Vol. 7298
Bolometer; Focal plane array (FPA); Readout circuit; Uncooled infrared imaging
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-21210DOI: 10.1117/12.819826ISBN: 08-1947-564-5ISBN: 978-08-1947-564-0OAI: oai:DiVA.org:liu-21210DiVA: diva2:240921
The International Society for Optical Engineering, April 13, 2009, Orlando, Florida, USA