Three-dimensionally stacked analog retinal prosthesis chip

Jun Deguchi, Taiichiro Watanabe, Tomonori Nakamura, Yoshihiro Nakagawa, Takafumi Fukushima, Shim Jeoung-Chill, Hiroyuki Kurino, Toshiaki Abe, Makoto Tamai, Mitsumasa Koyanagi

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


As blind patients with an intact optic nerve and damaged photoreceptor cells increase in number in recent years, there has been a growing interest in visual prostheses by electrically stimulating their retinas. Previous clinical studies indicated that blind patients perceive a controlled electrical current applied to a small area of the retina via electrodes as a spot of light. We propose a novel implantable device, so-called three-dimensionally (3D) stacked retinal prosthesis, which is composed of a photodetector, an image processor, electrical current generator circuits, and an electrode array on one chip. The spice simulation showed that our designed analog circuits for 3D stacked retinal prosthesis chip could output desirable electrical current with variable pulse width by controlling bias voltages.

Original languageEnglish
Pages (from-to)1685-1689
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number4 B
Publication statusPublished - 2004 Apr


  • Analog circuit
  • Retinal prosthesis
  • Three-dimensional integration technology

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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