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Noise: You Love It or You Hate It

10:00 AM ET
Webinar - Online
Abira Sengupta –
Abstract: This webinar will focus on the various noise sources present in a CMOS image sensor. A CMOS image sensor is a great example of a mixed-signal circuit : the analog pixel array is driven by digital control signals. The analog output signal generated by the pixel array, goes through a denoising step in the analog domain before being converted to the digital domain. So it should not be surprising that a CMOS image sensor is a complex collection of different noise sources. 
This webinar will address the most important noise sources in a CMOS image sensor, from temporal noise to spatial noise. The origin of those noise sources will be explained and countermeasures will be suggested. A lot of the countermeasures are already implemented in today’s devices. Without the tremendous noise reduction techniques developed in the last decades, it would never ever have been possible to make colour images at the extreme low light levels like we have at this moment. The noise floor of today’s devices is that low that we can almost detect single electrons with standard consumer devices. Noise : do you love it or do you hate it ? As a consumer I hate it, as an imaging engineer I love it !
Bio: J.P. Theuwissen was born in Maaseik (Belgium) on December 20, 1954.  He received the degree in electrical engineering from the Catholic University of Leuven (Belgium) in 1977.  His thesis work was based on the development of supporting hardware around a linear CCD image sensor.
From 1977 to 1983, his work at the ESAT laboratory of the Catholic University of Leuven focused on semiconductor technology for linear CCD image sensors.  He received the Ph.D. degree in electrical engineering in 1983.  His dissertation was on the implementation of transparent conductive layers as gate material in the CCD technology.
In 1983, he joined the Micro Circuits Division of the Philips Research Laboratories in Eindhoven (the Netherlands), as a member of the scientific staff.  Since that time he was involved in research in the field of solid state image sensing, which resulted in the project leadership of respectively SDTV- and HDTV imagers.  In 1991 he became Department Head of the division Imaging Devices, including CCD as well as CMOS solid state imaging activities.  
He is author or coauthor of over 200 technical papers in the solid state imaging field and issued several patents. In 1988, 1989, 1995 and 1996 he was a member of the International Electron Devices Meeting paper selection committee.  He is co editor of IEEE Micro special issue on Digital Imaging, Nov./Dec. 1998 and of the IEEE Transactions on Electron Devices special issues on Solid State Image Sensors, May 1991, October 1997, January 2003, November 2009, and he acted as chief guest-editor of the special issue on Solid-State Image Sensors January 2016.  In 1995, he authored a textbook "Solid State Imaging with Charge Coupled Devices" and in 2011 he co-edited the book "Single-Photon Imaging".  In 1998, 2007 and 2015 he became an IEEE ED and SSCS distinguished lecturer.
He acted as general chairman of the International Image Sensor Workshop (formerly IEEE International Workshop on Charge-Coupled Devices and Advanced Image Sensors) in 1997, 2003, 2009 and 2015.  He is member of the Steering Committee of the aforementioned workshop and founder of the Walter Kosonocky Award, which highlights the best paper in the field of solid-state image sensors.  
During several years he was a member of the technical committee of the European Solid-State Device Research Conference and of the European Solid-State Circuits Conference.
From 1999 till 2010 he was a member of the technical committee of the International Solid-State Circuits Conference.  For the same conference he acted as secretary, vice-chair and chair in the European ISSCC Regional Committee and since 2002 he was a member of the overall ISSCC Executive Committee.  He has been elected to be International Technical Program Chair vice-chair and chair for respectively the ISSCC 2009 and ISSCC 2010.
In March 2001, he was appointed as part-time professor at the Delft University of Technology, the Netherlands.  At this University he teaches courses in solid-state imaging; coaches MSc and PhD students in their research on CMOS image sensors.
In April 2002, he joined DALSA Corp. to act as the company’s Chief Technology Officer.  In September 2004 he retired as CTO and became Chief Scientist of DALSA Semiconductors.   After he left DALSA in September 2007, he started his own company “Harvest Imaging”, focusing on consulting, training, teaching and coaching in the field of solid-state imaging technology (
In 2006 he co-founded (together with his peers Eric Fossum and Nobukazu Teranishi) ImageSensors, Inc. (a California non-profit public benefit company) to address the needs of the image sensor community (
In 2008, he received the SMPTE’s Fuji Gold medal for his contributions to the research, development and education of others in the field of solid-state image capturing.  He is member of editorial board of the magazine “Photonics Spectra”, an IEEE Fellow and member of SPIE.
In 2011 he was elected as “Electronic Imaging Scientist of the Year”, in 2013 he received the Exceptional Service Award of the International Image Sensor Society and in 2014 he was awarded with the SEMI Award.