Power Supply System Using Electromagnetic Induction for Three-Dimensionally Stacked Retinal Prosthesis Chip

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概要

• 論文の詳細を見る

• We have proposed a new retinal prosthesis system consisting of a three-dimensionally (3-D) stacked retinal prosthesis chip, a flexible cable with an electrode array stimulus, and a power supply system for the retinal prosthesis chip. Electromagnetic induction with a primary coil and a secondary coil was employed as the power supply system. The power was transmitted to the retinal prosthesis chip through an RF/DC voltage conversion chip that converted AC voltage into DC voltage. The 3-D stacked retinal prosthesis chip operates with a DC supply voltage of 3.3 V, and the secondary coil requires a transmitted voltage that is 1 V higher than the DC supply voltage. In order to receive a sufficient supply voltage, several parameters such as external supply voltage and transmission frequency were optimized. A peak RF voltage of 4.5 V was obtained when we employed a primary coil with 50 turns, a secondary coil with 20 turns, an external supply voltage of 4.1 V, and a frequency of 3 MHz. We also successfully fabricated Schottky barrier diodes to rectify the RF voltage received by the secondary coil. The fabricated Schottky barrier diodes have a high breakdown voltage of 4.6 V, which is sufficient for our 3-D stacked retinal prosthesis chip.

• 2008-04-25

著者

• Tamai Makoto

  Ophthtalmology School Of Medicine Tohoku University

• Fukushima Takafumi

  Department Of Advanced Materials Chemistry Graduate School Of Engineering Yokohama National Universi

• Sato Keigo

  Department Of Brewing And Fermentation Tokyo University Of Agriculture

• Tanaka Tetsu

  Department Of Quantum Materials Science University Of Tokushima

• TOMITA Hiroshi

  Biofunctional Science, Tohoku University Biomedical Engineering Research Organization

• KOBAYASHI Risato

  Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University

• KOMIYA Ken

  Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University

• Koyanagi Mitsumasa

  Department Of Bioengineering And Robotics Graduate School Of Engineering Tohoku University

• Kurino Hiroyuki

  Department Of Bioengineering And Robotics Graduate School Of Engineering Tohoku University

• Kobayashi Takafumi

  Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

• Kurino Hiroyuki

  Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

• Tanaka Tetsu

  Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

• Kobayashi Risato

  Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

• Tamai Makoto

  Ophthalmology, School of Medicine, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan

• Tomita Hiroshi

  Biofunctional Science, Tohoku University Biomedical Engineering Research Organization, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan

• Sato Keigo

  Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

• Kobayashi Takafumi

  Department of Anesthesiology, Osaki Citizen Hospital, Japan

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