A Readout Circuit for an Uncooled IR Camera With Mismatch and Self-Heating Compensation
2012 (English)In: NORCHIP 2012, IEEE , 2012, 1-4 p.Conference paper (Refereed)
This paper presents a readout integrated circuit for an infrared focal plane array intended to be used in infrared network attached video cameras in surveillance applications. The focal plane array consists of 352×288 uncooled microbolometer detectors with a pitch of 25 µm. The circuit features mismatch correction and a non-linear ramped current pulse scheme for biasing of the detectors, in order to relax the dynamic range requirement of preamplifiers and ADC imposed by detector process variation and self-heating during readout. The integrated circuit is designed in a 0.35 µm standard CMOS process and a smaller 32×32 size test chip has been fabricated for verification. The test chip shows RMS input referred noise of 17 µV at 60 frames/second and dissipates 170 mW of power.
Place, publisher, year, edition, pages
IEEE , 2012. 1-4 p.
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:liu:diva-86147DOI: 10.1109/NORCHP.2012.6403138ISBN: 978-1-4673-2221-8 (print)ISBN: 978-1-4673-2223-2ISBN: 978-1-4673-2222-5 (online)OAI: oai:DiVA.org:liu-86147DiVA: diva2:575042
30th NORCHIP conference (NORCHIP 2012), the Nordic microelectronics event, 12-13 November 2012, Copenhagen, Denmark