A high performance multi-tap CMOS lock-in pixel image sensor for biomedical applications

Min-Woong Seo; Yuya Shirakawa; Keiichiro Kagawa; Keita Yasutomi; Shoji Kawahito

doi:10.1117/12.2255951

22 February 2017 A high performance multi-tap CMOS lock-in pixel image sensor for biomedical applications

Min-Woong Seo, Yuya Shirakawa, Keiichiro Kagawa, Keita Yasutomi, Shoji Kawahito

Proceedings Volume 10076, High-Speed Biomedical Imaging and Spectroscopy: Toward Big Data Instrumentation and Management II; 100760V (2017) https://doi.org/10.1117/12.2255951
Event: SPIE BiOS, 2017, San Francisco, California, United States

Abstract

We have developed and evaluated the large full well capacity (FWC) for wide signal detection range and low temporal noise for high sensitivity lock-in pixel CMOS image sensor (CIS) embedded with two storage-diodes (SDs). In addition, for fast charge transfer from photodiode (PD) to SDs, a lateral electric field charge modulator (LEFM) is used for the developed lock-in pixel. As a result, the time-resolved CIS achieves a very large FWC of approximately 7000e-, low temporal random noise of 1.17e-rms at 45fps with true correlated double sampling (CDS) operation, and fast intrinsic response less than 500ps at 635nm. The proposed imager has an effective pixel array of 128(H)×256(V) and a pixel size of 11.2×11.2μm². The sensor chip is fabricated by a Dongbu HiTek 1P4M 0.11μm CIS process.

Citation Download Citation

Min-Woong Seo, Yuya Shirakawa, Keiichiro Kagawa, Keita Yasutomi, and Shoji Kawahito "A high performance multi-tap CMOS lock-in pixel image sensor for biomedical applications", Proc. SPIE 10076, High-Speed Biomedical Imaging and Spectroscopy: Toward Big Data Instrumentation and Management II, 100760V (22 February 2017); https://doi.org/10.1117/12.2255951

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