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29 April 2016 Design of a 3D-IC multi-resolution digital pixel sensor
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This paper presents a digital pixel sensor (DPS) integrating a sigma-delta analog-to-digital converter (ADC) at pixel level. The digital pixel includes a photodiode, a delta-sigma modulation and a digital decimation filter. It features adaptive dynamic range and multiple resolutions (up to 10-bit) with a high linearity. A specific row decoder and column decoder are also designed to permit to read a specific pixel chosen in the matrix and its neighborhood of 4 x 4. Finally, a complete design with the CMOS 130 nm 3D-IC FaStack Tezzaron technology is also described, revealing a high fill-factor of about 80%.
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N. Brochard, J. Nebhen, J. Dubois, and D. Ginhac "Design of a 3D-IC multi-resolution digital pixel sensor", Proc. SPIE 9897, Real-Time Image and Video Processing 2016, 989707 (29 April 2016);

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