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http://dx.doi.org/10.5369/JSST.2005.14.3.191

Vision chip for edge detection with a function of pixel FPN reduction  

Suh, Sung-Ho (Department of Electronics, Kyungpook National University)
Kim, Jung-Hwan (Department of Electronics, Kyungpook National University)
Kong, Jae-Sung (Department of Electronics, Kyungpook National University)
Shin, Jang-Kyoo (Department of Electronics, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.14, no.3, 2005 , pp. 191-197 More about this Journal
Abstract
When fabricating a vision chip, we should consider the noise problem, such as the fixed pattern noise(FPN) due to the process variation. In this paper, we propose an edge-detection circuit based on biological retina using the offset-free column readout circuit to reduce the FPN occurring in the photo-detector. The offset-free column readout circuit consists of one source follower, one capacitor and five transmission gates. As a result, it is simpler and smaller than a general correlated double sampling(CDS) circuit. A vision chip for edge detection has been designed and fabricated using $0.35\;{\mu}m$ 2-poly 4-metal CMOS technology, and its output characteristics have been investigated.
Keywords
vision chip; edge detection; FPN; offset-free column readout circuit;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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