Journal article
A complete 256-electrode retinal prosthesis chip
N Tran, S Bai, J Yang, H Chun, O Kavehei, Y Yang, V Muktamath, D Ng, H Meffin, M Halpern, E Skafidas
IEEE Journal of Solid State Circuits | Published : 2014
Abstract
This paper presents a complete 256-electrode retinal prosthesis chip, which is small and ready for packaging and implantation. It contains 256 separate programmable drivers dedicated to 256 electrodes for flexible stimulation. A 4-wire interface is employed for power and data transmission between the chip and a driving unit. Power and forward data are recovered from a 600 kHz differential signal, while backward data are sent at 100 kbps rate simultaneously. The stimulator possesses many stimulation features, supporting various stimulation strategies. Many safety features are included such as real-time monitoring of voltage compliance and temperature, electrode self-locking in the event of ou..
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Funding Acknowledgements
This work was supported by the Australian Research Council (ARC) through its Special Research Initiative (SRI) in Bionic Vision Science and Technology grant to Bionic Vision Australia (BVA) and Australia's ICT Research Centre of Excellence (NICTA).