A high acuity retinal stimulator in 65 nm CMOS process:.

This book presents a design of a flexible stimulator in 65 nm Complementary Metal Oxide Semiconductor (CMOS) as part of a 1024-electrode epiretinal prosthesis to restore partial vision in patients suffering from eye diseases such as retinitis pigmentosa (RP) and age-related macular degradation (AMD).The stimulator design is to support as many different stimulation strategies as possible. A distributed design where data is mainly processed at the local controller of every electrode driver simplifies signal routing, which is critical when the number of electrodes goes up to 1024. A novel electrode driver topology was proposed. Each electrode is controlled by its own driver, which helps selecting electrodes independently. A prototype stimulator with 64 outputs was designed, fabricated, and tested.

Nhan Tran received the Ph.D. degree in Electrical and Electronic Engineering from The University of Melbourne, Australia. Dr Tran is currently a Research Fellow at Centre for Neural Engineering, The University of Melbourne, where he is working on the implantable electronic chip for the Bionic Vision Australia’s high acuity retinal prosthesis.