32×32画素パルス周波数変調方式人工視覚イメージセンサ  [in Japanese] 32×32 Pixel Pulse-frequency-modulation Based Image Sensor for Retinal Prosthesis  [in Japanese]

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Author(s)

Abstract

We demonstrated a CMOS image sensor using pulse frequency modulation (PFM) for retinal prosthesis. We are fabricated the 32x32 pixel PFM image sensor with standard 0.6μm CMOS technology. We designed this chip for use in <I>in vitro</I> electro-physiology experiments. The image sensor pixel was composed of a PFM-based photosensor with a frequency limiter, a pulse shaper/amplifier, and a stimulus electrode. We measured the image sensor response vs. the illumination level. We further verified the pulse shaper/amplifier characteristics. By using the current output from the stimulus electrode, we successfully demonstrated positive and negative current output of 100μA driving an external electrode placed inside a multi-electrode array immersed in saline. This result shows that this chip could be used <I>in vitro</I> electro-physiology experiments. To observe the output pulse from the sensor, we used the LED display in order to visualize the input scene from each pixel output pulses, and demon-strates the visualization successfully.

Journal

  • The Journal of The Institute of Image Information and Television Engineers

    The Journal of The Institute of Image Information and Television Engineers 58(3), 352-361, 2004-03-01

    The Institute of Image Information and Television Engineers

References:  16

Cited by:  2

  • A Vision Chip for Retinal Prosthesis with Pulse-Domain Image Preprocessing  [in Japanese]

    OHTA Jun , FURUMIYA Tesuto , NG David C. , UEHARA Akihiro , KAGAWA Keiichiro , TOKUDA Takashi , NUNOSHITA Masahiro

    電子情報通信学会技術研究報告. NC, ニューロコンピューティング 103(466), 19-23, 2003-11-15

    References (7)

  • Image Input  [in Japanese]

    UEHIRA Kazutake , KOMIYA Kazumi

    The Journal of the Institute of Image Electronics Engineers of Japan 33(6), 951-953, 2004-11-25

    References (20)

Codes

  • NII Article ID (NAID)
    110006837126
  • NII NACSIS-CAT ID (NCID)
    AN10588970
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13426907
  • NDL Article ID
    6864496
  • NDL Source Classification
    ZN33(科学技術--電気工学・電気機械工業--電子工学・電気通信)
  • NDL Call No.
    Z16-307
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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