| Autor: |
Jun Ohta, Hirofumi Yagi, Kazuo Kyuma, Kunihiko Hara, Eiichi Funatsu, Yoshikazu Nitta, Takashi Toyoda, Yasunari Miyake |
| Rok vydání: |
1995 |
| Předmět: |
|
| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.223990 |
| Popis: |
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.' |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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