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Author Ohta, J. ♦ Furumiya, T. ♦ Ng, D.C. ♦ Uehara, A. ♦ Kagawa, K. ♦ Tokuda, T. ♦ Nunoshita, M.
Sponsorship IEEE Sensors Council
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2003
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Pulse modulation ♦ Frequency modulation ♦ Retina ♦ Prosthetics ♦ CMOS technology ♦ Photodiodes ♦ Circuit testing ♦ Dynamic range ♦ Visualization ♦ In vivo
Abstract This paper describes improvements in output waveform of pulse frequency modulation (PFM) photosensor to be effectively adapted for retinal prosthesis. A 32/spl times/32-pixel PFM photosensor array chip is fabricated using 0.6 /spl mu/m CMOS technology and demonstrated the improved functions. Also the output pulse pattern is displayed with 32/spl times/32-LED array to visualize the pulse output waveform. The next version of a PFM vision chip is designing for in vivo experiment, in which in-pixel image processing functions in pulse domain are employed.
Description Author affiliation: Nara Inst. of Sci. & Technol., Japan (Ohta, J.; Furumiya, T.; Ng, D.C.; Uehara, A.; Kagawa, K.; Tokuda, T.; Nunoshita, M.)
ISBN 0780381335
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2003-10-22
Publisher Place Canada
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 211.52 kB
Page Count 4
Starting Page 171
Ending Page 174


Source: IEEE Xplore Digital Library