An Arbitrary Waveform 16 Channel Neural Stimulator with Adaptive Supply Regulator in 0.35 um HV CMOS for Visual Prosthesis

摘要

We describe a neural stimulator front-end with arbitrary stimulation waveform generator and adaptive supply regulator (ASR) for visual prosthesis. Each pixel circuit generates arbitrary current waveform with 5 bit programmable amplitude. The ASR provides the internal supply voltage regulated to the minimum required voltage for stimulation. The prototype is implemented in 0.35 u.m CMOS with HV option and occupies 2.94 mm2 including I/Os.