T
Takashi Tokuda
Researcher at Tokyo Institute of Technology
Publications - 282
Citations - 3711
Takashi Tokuda is an academic researcher from Tokyo Institute of Technology. The author has contributed to research in topics: Image sensor & CMOS. The author has an hindex of 29, co-authored 280 publications receiving 3336 citations. Previous affiliations of Takashi Tokuda include National Presto Industries & Kyoto University.
Papers
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Polarization-Analyzing CMOS Image Sensor With Monolithically Embedded Polarizer for
TL;DR: Although the pixel-level performance was confirmed to be limited, estimation schemes based on the variation of the polarizer angle provided a promising performance for real-time polarization measurements.
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Pixel design of pulsed CMOS image sensor for retinal prosthesis with digital photosensitivity control
Keiichiro Kagawa,Keiichi Isakari,Tetsuo Furumiya,Akihiro Uehara,Takashi Tokuda,Jun Ohta,Masahiro Nunoshita +6 more
TL;DR: Experimental results showed that the newly designed pulse frequency modulation photosensor was sensitive over a dynamic range of input light of about 120 dB, and that photosensitivity could be varied from 0 dB to around -40 dB.
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1 mm3-sized optical neural stimulator based on CMOS integrated photovoltaic power receiver
Takashi Tokuda,Takaaki Ishizu,Wuthibenjaphonchai Nattakarn,Makito Haruta,Toshihiko Noda,Kiyotaka Sasagawa,Mohamad Sawan,Jun Ohta +7 more
TL;DR: In this article, a complementary metal-oxide semiconductor (CMOS)-controlled photovoltaic power transfer platform was proposed for very small (less than or equal to 1-2 mm) electronic devices such as implantable health-care devices or distributed nodes for the Internet of Things.
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CMOS image sensor-based implantable glucose sensor using glucose-responsive fluorescent hydrogel
Takashi Tokuda,Masayuki Takahashi,Kazuhiro Uejima,K. Masuda,Toshikazu Kawamura,Yasumi Ohta,Mayumi Motoyama,Toshihiko Noda,Kiyotaka Sasagawa,Teru Okitsu,Shoji Takeuchi,Jun Ohta +11 more
TL;DR: A CMOS image sensor-based implantable glucose sensor based on an optical-sensing scheme is proposed and experimentally verified and a glucose-responsive fluorescent hydrogel is used as the mediator in the measurement scheme.
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An Implantable CMOS Image Sensor With Self-Reset Pixels for Functional Brain Imaging
Kiyotaka Sasagawa,Takahiro Yamaguchi,Makito Haruta,Yoshinori Sunaga,Hironari Takehara,Hiroaki Takehara,Toshihiko Noda,Takashi Tokuda,Jun Ohta +8 more
TL;DR: In this paper, an implantable CMOS image sensor with self-resetting pixels was proposed and demonstrated using a four-transistor Schmitt trigger inverter, which achieved a pixel size of $15~\mu \text {m} \times 15 ~\mu ǫ \text{m}$ and a fill factor of 31%.