21 February 2007 Linear-logarithmic image sensor with low noise and no flickers
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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.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shigehiro Miyatake, Shigehiro Miyatake, Masayuki Kusuda, Masayuki Kusuda, Tsuyoshi Iwamoto, Tsuyoshi Iwamoto, Tetsuya Katagiri, Tetsuya Katagiri, Koichi Kamon, Koichi Kamon, Kazuchika Sato, Kazuchika Sato, Yasuaki Serita, Yasuaki Serita, } "Linear-logarithmic image sensor with low noise and no flickers", Proc. SPIE 6501, Sensors, Cameras, and Systems for Scientific/Industrial Applications VIII, 65010I (21 February 2007); doi: 10.1117/12.711254; https://doi.org/10.1117/12.711254


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