Improvement of a pulse frequency modulation based photosensor for retinal prosthesis

Akihiro Uehara, Takashi Tokuda, Tetsuo Furumiya, Masahiro Nunoshita, Jun Ohta, Keiichiro Kagawa, David C. Ng

doi:10.1109/icsens.2003.1278922

Description

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.

Journal

Proceedings of IEEE Sensors 2003 (IEEE Cat. No.03CH37498)

Proceedings of IEEE Sensors 2003 (IEEE Cat. No.03CH37498) 1 171-174, 2004-07-08

IEEE

Details 詳細情報について

CRID: 1871709542871724544

DOI: 10.1109/icsens.2003.1278922

Data Source

OpenAIRE

Export

Report a problem