Pixel design of pulsed CMOS image sensor for retinal prosthesis with digital photosensitivity control

被引：30

作者：

Kagawa, K ^{[1
]}

Isakari, K ^{[1
]}

Furumiya, T ^{[1
]}

Uehara, A ^{[1
]}

Tokuda, T ^{[1
]}

Ohta, J ^{[1
]}

Nunoshita, M ^{[1
]}

机构：

[1] Nara Inst Sci & Technol, Nara 6300101, Japan

来源：

ELECTRONICS LETTERS | 2003年 / 39卷 / 05期

关键词：

D O I：

10.1049/el:20030325

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：419 / 421

页数：3

共 6 条

[1] A digital pixel image sensor for real-time readout [J].

Andoh, F ;

Shimamoto, H ;

Fujita, Y .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 2000, 47 (11) :2123-2127

[2] CMOS image sensors: Electronic camera-on-a-chip [J].

Fossum, ER .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 1997, 44 (10) :1689-1698

[3] A neuro-stimulus chip with telemetry unit for retinal prosthetic device [J].

Liu, WT ;

Vichienchom, K ;

Clements, M ;

DeMarco, SC ;

Hughes, C ;

McGucken, E ;

Humayun, MS ;

de Juan, E ;

Weiland, JD ;

Greenberg, R .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2000, 35 (10) :1487-1497

[4] Retinal prosthesis for the blind [J].

Margalit, E ;

Maia, M ;

Weiland, JD ;

Greenberg, RJ ;

Fujii, GY ;

Torres, G ;

Piyathaisere, DV ;

O'Hearn, TM ;

Liu, WT ;

Lazzi, G ;

Dagnelie, G ;

Scribner, DA ;

de Juan, E ;

Humayun, MS .

SURVEY OF OPHTHALMOLOGY, 2002, 47 (04) :335-356

[5] Proposal of application of pulsed vision chip for retinal prosthesis [J].

Ohta, J ;

Yoshida, N ;

Kagawa, K ;

Nunoshita, M .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2002, 41 (4B) :2322-2325

[6] SCOTOPIC AND MESOPIC LIGHT ADAPTATION IN CATS RETINA [J].

SAKMANN, B ;

CREUTZFELDT, OD .

PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY, 1969, 313 (02) :168-+

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