Design And Implementation Of A Monolithic Programme-Controlled System For Retinal Prosthesis

In this study, a monolithic system is proposed and verified for retinal prosthesis. It includes an extraocular platform which can support a 16-channel image processing with parameter control and a channel-combined Manchester encoder for wireless transmission. Besides, an intraocular programme-controlled chip for multi-channel microstimulator is also presented. This micro-control chip has been realized by using a TSMC 0.35-mum 2P4M standard CMOS technology. The results of extraocular testing show that the efficacy of the system can meet the requirement of an implantable device for the retinal prosthesis.

[1]  J. Wyatt,et al.  REVIEW ■ : Prospects for a Visual Prosthesis , 1997 .

[2]  W. Liu,et al.  A neuro-stimulus chip with telemetry unit for retinal prosthetic device , 2000, IEEE Journal of Solid-State Circuits.

[3]  K Arabi,et al.  Electronic design of a multichannel programmable implant for neuromuscular electrical stimulation. , 1999, IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society.

[4]  G. Brindley,et al.  The site of electrical excitation of the human eye , 1955, The Journal of physiology.

[5]  R. Eckmiller.  Learning retina implants with epiretinal contacts. , 1997, Ophthalmic research.

[6]  Malini Narayanan Nadig.  Development of a silicon retinal implant: cortical evoked potentials following focal stimulation of the rabbit retina with light and electricity , 1999, Clinical Neurophysiology.

[7]  J. Judy,et al.  Micromachined electrodes for retinal prostheses , 2002, 2nd Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology. Proceedings (Cat. No.02EX578).

[8]  G. Lazzi,et al.  Simulated temperature increase in a head/eye model containing an intraocular retinal prosthesis , 2001, IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229).

[9]  Bedrich J. Hosticka,et al.  Single-chip CMOS image sensors for a retina implant system , 1999 .