Multi-Channel Stimulator IC Using a Channel Sharing Method for Retinal Prostheses
| Autor: | Sangmin Lee, Hyung-Jung Yoo, Dong-il Dan Cho, Sunkil Park, Sukwon Jung, Jae-Hyun Ahn, Seok-June Hong, Hyoungho Ko |
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| Rok vydání: | 2013 |
| Předmět: |
genetic structures
Computer science Biomedical Engineering Pharmaceutical Science Medicine (miscellaneous) Bioengineering chemistry.chemical_compound Electricity Retinitis pigmentosa medicine General Materials Science Electronics Electrodes Retina Pixel Retinal Models Theoretical Chip medicine.disease BCDMOS eye diseases Visual Prosthesis medicine.anatomical_structure chemistry Visual prosthesis Biomedical engineering |
| Zdroj: | Journal of Biomedical Nanotechnology. 9:621-625 |
| ISSN: | 1550-7033 |
| DOI: | 10.1166/jbn.2013.1524 |
| Popis: | A retinal stimulator is an implantable device restoring vision by supplying a controlled, stimulating electrical signal to people blinded by retinal diseases such as age-related macular degeneration (AMD) and retinitis pigmentosa (RP). The resolution requirements of artificial retina systems become increasingly significant in their design as well as their usefulness. At least 32 x 32 pixels are required to provide a minimal visual function. However, a retinal stimulator with a high resolution imposes severe constraints on interface electronics. In this paper, a new stimulator IC (integrated chip) using a channel sharing technique is developed to minimize the circuit size, power consumption, as well as overheating of retina tissues. The proposed current-mode stimulator is fabricated by a 0.35 microm 2-poly/4-metal BCDMOS technology. Attention is given to minimizing the silicon area so that higher channel numbers can be implemented. The stimulator for each channel can provide output current in the range of 0-350 muA. The effective chip area excluding the pads is 1.2 mm x 1.2 mm. |
| Databáze: | OpenAIRE |
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