DocumentCode
1166886
Title
Pixel design of pulsed CMOS image sensor for retinal prosthesis with digital photosensitivity control
Author
Kagawa, K. ; Isakari, K. ; Furumiya, T. ; Uehara, A. ; Tokuda, T. ; Ohta, Jun ; Nunoshita, M.
Author_Institution
Nara Inst. of Sci. & Technol., Japan
Volume
39
Issue
5
fYear
2003
fDate
3/6/2003 12:00:00 AM
Firstpage
419
Lastpage
421
Abstract
A newly designed pulse frequency modulation photosensor for use in retinal prosthesis is proposed and demonstrated. The pixel converts the intensity of incident light into biphasic current pulses at frequencies suitable for the electrical stimulation of retinal neurons. Experimental results showed that the device was sensitive over a dynamic range of input light of about 120 dB, and that photosensitivity could be varied from 0 dB to around -40 dB.
Keywords
CMOS image sensors; biomedical electronics; eye; prosthetics; pulse frequency modulation; digital photosensitivity control; dynamic range; electrical stimulation; pixel design; pulse frequency modulation photosensor; pulsed CMOS image sensor; retinal neurons; retinal prosthesis;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20030325
Filename
1189987
Link To Document