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Proceedings Paper

A global shutter CMOS image sensor with wide dynamic range pixel
Author(s): Jiang-tao Xu; Zhi-xun Yang; Shi-bin Zhao; Su-ying Yao
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Paper Abstract

A novel five transistor global shutter CMOS active pixel with ultra-high dynamic range is presented in this paper. A global shutter control transistor is added to traditional four transistor pixel. The five transistor pixel image sensor works in global shutter mode to shoot high speed moving object with dual sampling to eliminate fixed pattern noise. The image sensor can restore four transistor pixel rolling shutter mode with global shutter control transistor shutoff to shoot stationary object with correlated dual sampling to eliminate fixed pattern noise and random noise. A digital control stepped reset-gate voltage technique with no additional components to increase dynamic range by the compression of charge integration characteristic curve and to implement anti-blooming by discharging excess carriers is adopted. Simulation results show that the image sensor can work in global shutter mode and the dynamic range is increased approximately by 20dB than typical CMOS image sensor.

Paper Details

Date Published: 6 August 2009
PDF: 6 pages
Proc. SPIE 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, 73842S (6 August 2009); doi: 10.1117/12.836622
Show Author Affiliations
Jiang-tao Xu, Tianjin Univ. (China)
Zhi-xun Yang, Tianjin Univ. (China)
Shi-bin Zhao, Tianjin Univ. (China)
Su-ying Yao, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 7384:
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications
Kun Zhang; Xiang-jun Wang; Guang-jun Zhang; Ke-cong Ai, Editor(s)

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