A flexible electrode driver using 65 nm CMOS process for 1024-electrode Epi-retinal prosthesis

Abstract

Retinal prostheses are being developed worldwide to help restore partial vision in patients suffering from eye diseases such as retinitis pigmentosa (RP) or age-related macular degradation (AMD). This paper presents a flexible electrode driver using 65 nm CMOS process for a 1024-electrode epiretinal prosthesis. The electrode driver is part of the implant device which is used to deliver electrical stimulus current to retinal tissues via electrodes. The electrode driver can drive its electrode to function as active or return. The electrode driver is able to provide stimulus current with fully programmable parameters such as pulse width, inter-phase delay, amplitude, stimulation rate. 6-bit dig..