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Proceedings Paper

Linear-logarithmic image sensor with low noise and no flickers
Author(s): Shigehiro Miyatake; Masayuki Kusuda; Tsuyoshi Iwamoto; Tetsuya Katagiri; Koichi Kamon; Kazuchika Sato; Yasuaki Serita
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Paper Abstract

This paper proposes and demonstrates a linear-logarithmic image sensor that can operate in both the linear and logarithmic modes, and exhibits low noise and no flickers. Its pixel is composed of one buried-photodiode, five n-channel MOS transistors, two p-channel MOS transistors, and one capacitor. During the linear mode operation, the pixel behaves the same as the four-transistor one, offering a low dark current and low noise. Also, in the logarithmic mode, it operates in an integrating manner in contrast to the majority of logarithmic-response CMOS image sensors that operate in a continuous manner. Thus it has no flickers and can calibrate the fixed pattern noise using the reference level. A wide dynamic range of 190 dB has been confirmed with a 256 × 256-pixel image sensor employing this novel pixel architecture.

Paper Details

Date Published: 21 February 2007
PDF: 11 pages
Proc. SPIE 6501, Sensors, Cameras, and Systems for Scientific/Industrial Applications VIII, 65010I (21 February 2007); doi: 10.1117/12.711254
Show Author Affiliations
Shigehiro Miyatake, Konica Minolta Technology Ctr., Inc. (Japan)
Masayuki Kusuda, Konica Minolta Technology Ctr., Inc. (Japan)
Tsuyoshi Iwamoto, Konica Minolta Technology Ctr., Inc. (Japan)
Tetsuya Katagiri, Konica Minolta Technology Ctr., Inc. (Japan)
Koichi Kamon, Konica Minolta Technology Ctr., Inc. (Japan)
Kazuchika Sato, Konica Minolta Technology Ctr., Inc. (Japan)
Yasuaki Serita, Konica Minolta Technology Ctr., Inc. (Japan)


Published in SPIE Proceedings Vol. 6501:
Sensors, Cameras, and Systems for Scientific/Industrial Applications VIII
Morley M. Blouke, Editor(s)

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