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Proceedings Paper

Artificial retina chip with a 256 x 256 array of n-MOS variable sensitivity photodetector cells
Author(s): Eiichi Funatsu; Yoshikazu Nitta; Yasunari Miyake; Takashi Toyoda; Kunihiko Hara; Hirofumi Yagi; Jun Ohta; Kazuo Kyuma
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Paper Abstract

The artificial retina chip, consisting of an array of variable sensitivity photo-detector cells (VSPD), attains versatile focal plane image processing using vector-matrix multiplication. We designed an n-MOS VSPD with a pn photodiode and a differential amplifier, which realizes programmable positive and negative sensitivity. The pixels of the fabricated 256 multiplied by 256 pixel artificial retina chip are 35 multiplied by 26 micrometers squared with a 25% aperture ratio in a 2 micrometer n-MOS process. The photosensitivity is 0.23 (mu) A/lx for 1 ms accumulation time. We demonstrate image capture in 'video mode' and 'edge extraction mode.'

Paper Details

Date Published: 3 October 1995
PDF: 9 pages
Proc. SPIE 2597, Machine Vision Applications, Architectures, and Systems Integration IV, (3 October 1995); doi: 10.1117/12.223990
Show Author Affiliations
Eiichi Funatsu, Mitsubishi Electric Corp. (Japan)
Yoshikazu Nitta, Mitsubishi Electric Corp. (Japan)
Yasunari Miyake, Mitsubishi Electric Corp. (Japan)
Takashi Toyoda, Mitsubishi Electric Corp. (Japan)
Kunihiko Hara, Mitsubishi Electric Corp. (Japan)
Hirofumi Yagi, Mitsubishi Electric Corp. (Japan)
Jun Ohta, Mitsubishi Electric Corp. (Japan)
Kazuo Kyuma, Mitsubishi Electric Corp. (Japan)

Published in SPIE Proceedings Vol. 2597:
Machine Vision Applications, Architectures, and Systems Integration IV
Bruce G. Batchelor; Susan Snell Solomon; Frederick M. Waltz, Editor(s)

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