A Linear-Logarithmic CMOS Image Sensor With Pixel-FPN Reduction and Tunable Response Curve
In: IEEE Sensors Journal, Jg. 14 (2014-05-01), S. 1625-1632
Online
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Zugriff:
This paper presents a high dynamic range (DR) linear-logarithmic (Lin-Log) CMOS image sensor (CIS) pixel with threshold voltage cancellation technique for pixel fixed pattern noise (PFPN) reduction. A tunable pixel response curve was applied for different environments. To avoid the gain loss of source follower in conventional APS structure, a column shared-amplifier with programmable gain was also applied. A prototype high DR Lin-Log CIS chip consisting of 100 × 100 5-T pixel array with n+/p-sub photodiode, a pixel area of 6 × 6 μm2, and 3.3 V operation was designed and fabricated in TSMC 0.18 μm CMOS 1P6M standard process. The measured results achieved a DR of 143 dB, a PFPN related to sensitivity in logarithmic response (rms/log-sensitivity) of 1.96%, and a PFPN related to full-swing in logarithmic response (rms/Vlog-swing) of 0.45%. Linear and logarithmic sensitivity were 651 mV/lux-s and 55 mV per decade of illumination, respectively, at 50 fps. The temporal noise and power consumption were 0.746 m Vrms and 1.88 mW, respectively.
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A Linear-Logarithmic CMOS Image Sensor With Pixel-FPN Reduction and Tunable Response Curve
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Autor/in / Beteiligte Person: | Chou, Wei-Fan ; Chiu, Chin-Fong ; Yeh, Shang-Fu ; Hsieh, Chih-Cheng |
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Zeitschrift: | IEEE Sensors Journal, Jg. 14 (2014-05-01), S. 1625-1632 |
Veröffentlichung: | Institute of Electrical and Electronics Engineers (IEEE), 2014 |
Medientyp: | unknown |
ISSN: | 1558-1748 (print) ; 1530-437X (print) |
DOI: | 10.1109/jsen.2013.2294740 |
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