NDLI: 3-TFT active pixel sensor with correlated double sampling readout circuit for real-time medical x-ray imaging

Content Provider	IEEE Xplore Digital Library
Author	Safavian, N. Chaji, G.R. Kabir, M.Z. Nathan, A. Rowlands, J.A.
Copyright Year	2006
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont. (Safavian, N.; Chaji, G.R.; Kabir, M.Z.; Nathan, A.)
Abstract	This paper presents a current-programmed, current-output active pixel sensor (APS) suitable for real time X-ray imaging (e.g., fluoroscopy) using hydrogenated amorphous silicon (a-Si:H) thin film transistor (TFT) technology and an appropriate CMOS readout circuit. The proposed pixel circuit can successfully compensate for characteristic variations such as mobility and threshold voltage shift in a-Si:H TFTs. The proposed readout circuit exploits correlated double sampling (CDS) technique not only for reducing the offset current and low frequency noise, but also to reduce the effect of fixed-pattern noise (FPN) on the array operation. The on-pixel amplification reduces the input referred noise to levels that can satisfy the strict requirements for low noise digital fluoroscopy
Sponsorship	IEEE CAS
Starting Page	265
Ending Page	268
File Size	269565
Page Count	4
File Format	PDF
ISBN	1424404169
DOI	10.1109/NEWCAS.2006.250919
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-18
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pixel Image sensors Sampling methods Biomedical imaging X-ray imaging Low-frequency noise Noise reduction Circuit noise CMOS image sensors Thin film transistors
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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