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An integrating CMOS APS for X-ray imaging with an in-pixel preamplifier
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.ORCID iD: 0000-0002-8325-5177
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
2001 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 466, no 1, 232-236 p.Article in journal (Refereed) Published
Abstract [en]

We present in this paper an integrating CMOS Active Pixel Sensor (APS) circuit coated with scintillator type sensors for intra-oral dental X-ray imaging systems. The photosensing element in the pixel is formed by the p-diffusion on the n-well diode. The advantage of this photosensor is its very low direct absorption of X-rays compared to the other available photosensing elements in the CMOS pixel. The pixel features an integrating capacitor in the feedback loop of a preamplifier of a finite gain in order to increase the optical sensitivity. To verify the effectiveness of this in-pixel preamplification, a prototype 32 x 80 element CMOS active pixel array was implemented in a 0.8 mum CMOS double poly, n-well process with a pixel pitch of 50 mum. Measured results confirmed the improved optical sensitivity performance of the APS. Various measurements on device performance are presented.

Place, publisher, year, edition, pages
2001. Vol. 466, no 1, 232-236 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-8268DOI: 10.1016/S0168-9002(01)00850-6ISI: 000169789200035Scopus ID: 2-s2.0-0035927773OAI: oai:DiVA.org:miun-8268DiVA: diva2:133898
Conference
2nd International Workshop on Radiation Imaging Detectors; Freiburg; Germany; 2 July 2000 through 6 July 2000
Note

2nd International Workshop on Radiation Imaging Detectors, Jul 02-06, 2000, Freiburg, Germany

Available from: 2009-01-15 Created: 2009-01-15 Last updated: 2016-10-17Bibliographically approved

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Abdalla, Munir AFröjdh, ChristerPetersson, Sture

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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Electrical Engineering, Electronic Engineering, Information Engineering

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