Abstract
We are developing an artificial vision device to restore vision for the blind by electrically stimulating retinal tissue. We propose a retinal prosthesis that includes artificial vision devices with functions of signal processing, optical detection and electrical stimulation. In the proposed retinal prosthesis, an optical signal is processed and converted to a stimulus current suitable for restoring vision by an arithmetic circuit in the device. In this paper, we describe the functions of proposed retinal prosthesis. In addition, we designed and characterized TEG (Test Element Group) circuits, which are the core blocks and PFM (Pulse Frequency Modulation) photo sensor in standard 0.35-μm CMOS process.
