Artificial retina chip with a 256 x 256 array of n-MOS variable sensitivity photodetector cells

Eiichi Funatsu; Yoshikazu Nitta; Yasunari Miyake; Takashi Toyoda; Kunihiko Hara; Hirofumi Yagi; Jun Ohta; Kazuo Kyuma

doi:10.1117/12.223990

3 October 1995 Artificial retina chip with a 256 x 256 array of n-MOS variable sensitivity photodetector cells

Eiichi Funatsu, Yoshikazu Nitta, Yasunari Miyake, Takashi Toyoda, Kunihiko Hara, Hirofumi Yagi, Jun Ohta, Kazuo Kyuma

Proceedings Volume 2597, Machine Vision Applications, Architectures, and Systems Integration IV; (1995) https://doi.org/10.1117/12.223990
Event: Photonics East '95, 1995, Philadelphia, PA, United States

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.'

Citation Download Citation

Eiichi Funatsu, Yoshikazu Nitta, Yasunari Miyake, Takashi Toyoda, Kunihiko Hara, Hirofumi Yagi, Jun Ohta, and Kazuo Kyuma "Artificial retina chip with a 256 x 256 array of n-MOS variable sensitivity photodetector cells", Proc. SPIE 2597, Machine Vision Applications, Architectures, and Systems Integration IV, (3 October 1995); https://doi.org/10.1117/12.223990

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