Kiyotaka Sasagawa

63 papers C 9Journal 17Unranked 37

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	Microwave electro-optical imaging system using a frequency tracking optical local oscillator source with a polarization CMOS image sensor. IEICE Electron. Express Ryoma Okada, Maya Mizuno, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Jun Ohta, Kiyotaka Sasagawa
2024	—	`conf`	Charge-Pump-Circuit Implementation for Increasing Sink Current in Low-Volage CMOS Retinal-Prosthesis Chips. APCCAS Wisaroot Sriitsaranusorn, Yuki Nakanishi, Takaya Hattori, Kuang-Chih Tso, Kenzo Shodo, Hironari Takehara, Yoshinori Sunaga, Makito Haruta, Hiroyuki Tashiro, Yasuo Terasawa, Jun Ohta, Kiyotaka Sasagawa
2024	—	`conf`	Effects of Excitation Light Polarization with FrontLight Structure on Lensless Fluorescence Imaging. BioCAS Arphorn Promking, Kiyotaka Sasagawa, Yoshinori Sunaga, Yasumi Ohta, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Jun Ohta
2024	J	`jnl`	Exposure Time Control Method for Higher Intermediate Frequency in Optical Heterodyne Imaging and Its Application to Electric-Field Imaging Based on Electro-Optic Effect. Sensors Kiyotaka Sasagawa, Ryoma Okada, Yoshihiro Akamatsu, Maya Mizuno, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Jun Ohta
2024	J	`jnl`	Millimeter-Wave Band Electro-Optical Imaging System Using Polarization CMOS Image Sensor and Amplified Optical Local Oscillator Source. Sensors Ryoma Okada, Maya Mizuno, Tomoaki Nagaoka, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Jun Ohta, Kiyotaka Sasagawa
2023	—	`conf`	Front-light Structure for a Lensless Fluorescence Imaging Device with a Hybrid Emission Filter. BioCAS Kiyotaka Sasagawa, Yuki Ito, Daniel Schaeffer, Yoshinori Sunaga, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Jun Ohta
2023	J	`jnl`	Thin and Scalable Hybrid Emission Filter via Plasma Etching for Low-Invasive Fluorescence Detection. Sensors Erus Rustami, Kiyotaka Sasagawa, Kenji Sugie, Yasumi Ohta, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Jun Ohta
2022	J	`jnl`	Clear Fundus Images Through High-Speed Tracking Using Glare-Free IR Color Technology. J. Robotics Mechatronics Motoshi Sobue, Hirokazu Takata, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Kiyotaka Sasagawa, Ryo Kawasaki, Jun Ohta
2022	—	`conf`	Development of Compact Readout Device for Neural Observation System using Fluorescence Imaging and Fast-scan Cyclic Voltammetry. EMBC Ronnakorn Siwadamrongpong, Nicha Sato, Kenji Sugie, Yasumi Ohta, Makito Haruta, Hironari Takehara, Hiroyuki Tashiro, Kiyotaka Sasagawa, Jun Ohta
2022	—	`conf`	Mouse Brain Imaging Using a Self-Reset CMOS Image Sensor over 70-dB SNR. MWSCAS Kiyotaka Sasagawa, Pakpuwadon Thanet, Mark Christian Guinto, Yasumi Ohta, Makito Haruta, Hironari Takehara, Hiroyuki Tashiro, Jun Ohta
2021	—	`conf`	Implantable CMOS image sensor with a neural amplifier for simultaneous recording of optical and electrophysiological signals. BioCAS Kenji Sugie, Kiyotaka Sasagawa, Yasumi Ohta, Hironari Takehara, Makito Haruta, Hiroyuki Tashiro, Jun Ohta
2021	J	`jnl`	Micro-LED Array-Based Photo-Stimulation Devices for Optogenetics in Rat and Macaque Monkey Brains. IEEE Access Yasumi Ohta, Mark Christian Guinto, Takashi Tokuda, Mamiko Kawahara, Makito Haruta, Hironari Takehara, Hiroyuki Tashiro, Kiyotaka Sasagawa, Hirotaka Onoe, Reona Yamaguchi, Yoshinori Koshimizu, Kaoru Isa, Tadashi Isa, Kenta Kobayashi, Yasemin M. Akay, Metin Akay, Jun Ohta
2020	—	`conf`	Miniaturized CMOS imaging device for implantable applications. VLSI-DAT Kiyotaka Sasagawa, Makito Haruta, Yasumi Ohta, Hironari Takehara, Jun Ohta
2020	J	`jnl`	Needle-Type Imager Sensor With Band-Pass Composite Emission Filter and Parallel Fiber-Coupled Laser Excitation. IEEE Trans. Circuits Syst. I Fundam. Theory Appl. Erus Rustami, Kiyotaka Sasagawa, Kenji Sugie, Yasumi Ohta, Makito Haruta, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2019	C	`conf`	A Thin Composite Emission Filter and Fiber Coupled Laser Excitation for Implantable Fluorescence Imager Application. ISCAS Erus Rustami, Kiyotaka Sasagawa, Yasumi Ohta, Makito Haruta, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2019	—	`conf`	Live Demonstration: Lensless Highly Sensitive Fluorescence Imaging. BioCAS Kiyotaka Sasagawa, Kenji Sugie, Yasumi Ohta, Mamiko Kawahara, Makito Haruta, Jun Ohta
2019	—	`conf`	Multispectral Near-infrared Imaging Technologies for Nonmydriatic Fundus Camera. BioCAS Hironari Takehara, Hirofumi Sumi, Wang Ze, Takahiro Kondo, Makito Haruta, Kiyotaka Sasagawa, Jun Ohta
2018	—	`conf`	A 17-bit 104-dB-DR High-Precision Low-Power CMOS Fluorescence Biosensor With Extended Counting ADC and Noise Cancellation. NEWCAS Mehdi Noormohammadi Khiarak, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta, Sylvain Martel, Yves De Koninck, Benoit Gosselin
2018	C	`conf`	An Energy-Efficient CMOS Biophotometry Sensor With Incremental DT-∑Δ ADC Conversion. ISCAS Mehdi Noormohammadi Khiarak, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta, Sylvain Martel, Yves De Koninck, Benoit Gosselin
2018	—	`conf`	Battery-Free. Sticker-Like, Device for Health Monitoring, Operated by Optical Power Transfer. BioCAS Wuthibenjaphonchai Nattakarn, Makito Haruta, Toshihiko Noda, Kiyotaka Sasagawa, Takashi Tokuda, Mohamad Sawan, Sandro Carrara, Jun Ohta
2018	J	`jnl`	Compact Lensless Fluorescence Counting System for Single Molecular Assay. IEEE Trans. Biomed. Circuits Syst. Hironari Takehara, Yuta Nakamoto, Narihito Ikeda, Kiyotaka Sasagawa, Makito Haruta, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2018	—	`conf`	Excitation and Emission Filters for Implantable Fluorescence Imaging Devices by Laser Lift-Off Process. BioCAS Kiyotaka Sasagawa, Yasumi Ohta, Makito Haruta, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2018	C	`conf`	Live Demonstration: An Energy-Efficient CMOS Biophotometry Sensor Interface. ISCAS Mehdi Noormohammadi Khiarak, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta, Sylvain Martel, Yves De Koninck, Benoit Gosselin
2018	C	`conf`	Live Demonstration: IoT micronode with optical ID transmission capability operated by optical energy harvesting. ISCAS Takashi Tokuda, Wuthibenjaphonchai Nattakarn, Takaaki Ishizu, Makito Haruta, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta, Mohamad Sawan
2017	—	`conf`	A high-precision CMOS biophotometry sensor with noise cancellation and two-step A/D conversion. NEWCAS Mehdi Noormohammadi Khiarak, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta, Sylvain Martel, Yves De Koninck, Benoit Gosselin
2017	—	`conf`	CMOS-based opto-electric neural interface devices for optogenetics. MWSCAS Takashi Tokuda, Makito Haruta, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta
2017	—	`conf`	Fabrication and in vivo demonstration of microchip-embedded smart electrode device for neural stimulation in retinal prosthesis. BioCAS Toshihiko Noda, Shinya Nishimura, Yukari Nakano, Yasuo Terasawa, Makito Haruta, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta
2017	—	`conf`	Fluorescence imaging device with an ultra-thin micro-LED. BioCAS Kiyotaka Sasagawa, Makito Haruta, Koki Fujimoto, Yasumi Ohta, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2017	J	`jnl`	Implantable Microimaging Device for Observing Brain Activities of Rodents. Proc. IEEE Jun Ohta, Yasumi Ohta, Hiroaki Takehara, Toshihiko Noda, Kiyotaka Sasagawa, Takashi Tokuda, Makito Haruta, Takuma Kobayashi, Yasemin M. Akay, Metin Akay
2017	—	`conf`	Parylene-based flexible imaging device for physiological measurement of rodent brain. IEEE SENSORS Takahiro Yamaguchi, Hajime Hayami, Yoshinori Sunaga, Makito Haruta, Toshihiko Noda, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta
2017	J	`jnl`	Stimulator Design of Retinal Prosthesis. IEICE Trans. Electron. Jun Ohta, Toshihiko Noda, Kenzo Shodo, Yasuo Terasawa, Makito Haruta, Kiyotaka Sasagawa, Takashi Tokuda
2016	J	`jnl`	CMOS-Based Optoelectronic On-Chip Neural Interface Device. IEICE Trans. Electron. Takashi Tokuda, Hiroaki Takehara, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta
2016	—	`conf`	CMOS-based opto-electronic neural interface devices for optogenetics. EMBC Takashi Tokuda, Satoki Noguchi, Satoru Iwasaki, Hiroaki Takehara, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta
2016	—	`conf`	Compact lensless digital counting system for fluorescent micro-reaction-chamber array. BioCAS Hironari Takehara, Yuta Nakamoto, Kiyotaka Sasagawa, Hiroaki Takehara, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2016	—	`conf`	Hemodynamic imaging using an implantable self-reset image sensor. BioCAS Kiyotaka Sasagawa, Takahiro Yamaguchi, Makito Haruta, Yasumi Ohta, Hiroaki Takehara, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2016	J	`jnl`	In Vitro Long-Term Performance Evaluation and Improvement in the Response Time of CMOS-Based Implantable Glucose Sensors. IEEE Des. Test Takashi Tokuda, Toshikazu Kawamura, Keita Masuda, Tomohiro Hirai, Hironari Takehara, Yasumi Ohta, Mayumi Motoyama, Hiroaki Takehara, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta, Teru Okitsu, Shoji Takeuchi
2016	—	`conf`	Neural stimulators for retinal prosthesis embedded with CMOS microchips. MWSCAS Toshihiko Noda, Hiroaki Takehara, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta
2016	C	`conf`	On-chip fluorescence detection system with high-density microchamber array based on CMOS image sensor. ISCAS Jun Ohta, Hironari Takehara, Kiyotaka Sasagawa, Hiroaki Takehara, Toshihiko Noda, Takashi Tokuda
2015	—	`conf`	CMOS-based on-chip neural interface devices for optogenetics. BioCAS Takashi Tokuda, Hiroaki Takehara, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta
2015	—	`conf`	Fabrication and functional demonstration of a smart electrode with a built-in CMOS microchip for neural stimulation of a retinal prosthesis. EMBC Toshihiko Noda, Takumi Fujisawa, Ryohei Kawasaki, Hiroyuki Tashiro, Hiroaki Takehara, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta
2015	—	`conf`	High coupling efficiency contact imaging system having micro light pipe array for a digital enzyme-linked immunosorbent assay. BioCAS Hironari Takehara, Mizuki Nagasaki, Kiyotaka Sasagawa, Hiroaki Takehara, Toshihiko Noda, Takashi Tokuda, Hiroyuki Noji, Jun Ohta
2014	—	`conf`	An implantable green fluorescence imaging device using absorption filters with high excitation light rejection ratio. BioCAS Yoshinori Sunaga, Makito Haruta, Takahiro Yamaguchi, Mayumi Motoyama, Yasumi Ohta, Hiroaki Takehara, Toshihiko Noda, Kiyotaka Sasagawa, Takashi Tokuda, Jun Ohta
2014	—	`conf`	An implantable image sensor with self-reset function for brain imaging. BioCAS Kiyotaka Sasagawa, Takahiro Yamaguchi, Makito Haruta, Yoshinori Sunaga, Hironari Takehara, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2014	—	`conf`	Demonstration of implantable CMOS image sensors for functional brain imaging. BioCAS Kiyotaka Sasagawa, Yoshinori Sunaga, Makito Haruta, Takahiro Yamaguchi, Hironari Takehara, Hiroaki Takehara, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2013	C	`conf`	A CMOS microchip-based retinal prosthetic device for large numbers of stimulation in wide area. ISCAS Jun Ohta, Toshihiko Noda, Kiyotaka Sasagawa, Takashi Tokuda, Yasuo Terasawa, Hironari Kanda, Takashi Fujikado
2013	—	`conf`	An in vitro demonstration of CMOS-based optoelectronic neural interface device for optogenetics. EMBC Takashi Tokuda, S. Nakajima, Y. Maezawa, Toshihiko Noda, Kiyotaka Sasagawa, Yasuyuki Ishikawa, Sadao Shiosaka, Jun Ohta
2013	—	`conf`	Implantable image sensor based on intra-brain image transmission. EMBC Kiyotaka Sasagawa, Yoshiaki Ishii, Shogo Yokota, Takashi Matsuda, Peter Davis, Bing Zhang, Keren Li, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2012	—	`conf`	A CMOS-based on-chip neural interface device equipped with integrated LED array for optogenetics. EMBC Takashi Tokuda, Tomoaki Miyatani, Yasuyo Maezawa, Takuma Kobayashi, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta
2012	—	`conf`	A micro imaging device for measuring neural actvities in the mouse deep brain with minimal invasiveness. BioCAS Jun Ohta, Chikara Kitsumoto, Toshihiko Noda, Kiyotaka Sasagawa, Takashi Tokuda, Mayumi Motoyama, Yasumi Ohta, Takuma Kobayashi, Yasuaki Ishikawa, Sadao Shiosaka
2012	—	`conf`	Baseband signal transmission experiment for intra-brain communication with implantable image sensor. EMBC Kiyotaka Sasagawa, Shogo Yokota, Takashi Matsuda, Peter Davis, Bing Zhang, Keren Li, Takuma Kobayashi, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2012	—	`conf`	Image signal transmission through brain by an implantable micro-imager. BioCAS Kiyotaka Sasagawa, Shogo Yokota, Chikara Kitsumoto, Takashi Matsuda, Peter Davis, Bing Zhang, Keren Li, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2012	—	`conf`	Proposal and evaluation of intra-body sensing via sheet medium. INSS Takashi Matsuda, Bing Zhang, Keren Li, Kiyotaka Sasagawa, Jun Ohta, Peter Davis
2011	J	`jnl`	CMOS Imaging Devices for Biomedical Applications. IEICE Trans. Commun. Jun Ohta, Takuma Kobayashi, Toshihiko Noda, Kiyotaka Sasagawa, Takashi Tokuda
2011	—	`conf`	CMOS-based smart-electrode-type retinal stimulator with bullet-shaped bulk Pt electrodes. EMBC Takashi Tokuda, Takasuke Ito, Takuya Kitao, Toshihiko Noda, Kiyotaka Sasagawa, Yasuo Terasawa, Hiroyuki Tashiro, Hironari Kanda, Takashi Fujikado, Jun Ohta
2011	C	`conf`	Fabrication of a flexible neural interface device with CMOS-based smart electrodes. VLSI-SoC Toshihiko Noda, Takuya Kitao, Takasuke Ito, Kiyotaka Sasagawa, Takashi Tokuda, Yasuo Terasawa, Hiroyuki Tashiro, Hiroyuki Kanda, Takashi Fujikado, Jun Ohta
2011	C	`conf`	Micro CMOS image sensor for multi-area imaging. VLSI-SoC Kiyotaka Sasagawa, Hiroyuki Masuda, Ayato Tagawa, Takuma Kobayashi, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2011	—	`conf`	Wireless intra-brain communication for image transmission through mouse brain. EMBC Kiyotaka Sasagawa, Takashi Matsuda, Peter Davis, Bing Zhang, Keren Li, Takuma Kobayashi, Toshihiko Noda, Takashi Tokuda, Jun Ohta
2010	J	`jnl`	Development and in vivo Demonstration of CMOS-Based Multichip Retinal Stimulator With Simultaneous Multisite Stimulation Capability. IEEE Trans. Biomed. Circuits Syst. Takashi Tokuda, Yoichi Takeuchi, Yuki Sagawa, Toshihiko Noda, Kiyotaka Sasagawa, Kentaro Nishida, Takashi Fujikado, Jun Ohta
2009	—	`conf`	CMOS-based flexible multi-site retinal stimulator toward retinal prosthesis technology. CICC Takashi Tokuda, Yoichi Takeuchi, Toshihiko Noda, Kiyotaka Sasagawa, Jun Ohta
2009	J	`jnl`	Implantable CMOS Biomedical Devices. Sensors Jun Ohta, Takashi Tokuda, Kiyotaka Sasagawa, Toshihiko Noda
2009	J	`jnl`	Polarization-Analyzing CMOS Image Sensor With Monolithically Embedded Polarizer for Microchemistry Systems. IEEE Trans. Biomed. Circuits Syst. Takashi Tokuda, Hirofumi Yamada, Kiyotaka Sasagawa, Jun Ohta
2009	C	`conf`	Polarization-analyzing CMOS Image Sensor using Monolithically Embedded Polarizer for Microchemistry Systems. ISCAS Takashi Tokuda, Hirofumi Yamada, Kiyotaka Sasagawa, Jun Ohta
2005	J	`jnl`	Real-time monitoring system of RF near-field distribution images on the basis of 64-channel parallel electro-optic data acquisition. IEICE Electron. Express Kiyotaka Sasagawa, Masahiro Tsuchiya