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http://dx.doi.org/10.5369/JSST.2011.20.4.254

Current Stimulator with Adaptive Supply Regulator for Artificial Retina Prosthesis  

Ko, Hyoung-Ho (Department of Electronics, Chungnam National University)
Publication Information
Journal of Sensor Science and Technology / v.20, no.4, 2011 , pp. 254-259 More about this Journal
Abstract
In this paper, a current stimulator circuit with adaptive supply regulator for retinal prosthesis is proposed. In current stimulation systems, the stimulating circuits with wide voltage swing range are needed due to the high impedance of the retina cell and microelectrodes. Thus, previous researches adopt the high voltage architecture to obtain the enough operating range. The high voltage architecture, however, could increase the power consumption and can damage the retina cells. The proposed circuit provides the adaptively regulated supply voltage by measuring the difference between desired stimulation current and the actual stimulation current. The proposed circuit can achieve the extended range of the allowable cell impedance, improved accuracy of the stimulation current, and higher biosafety.
Keywords
Current Stimulation; Adaptive Supply; Retina Prosthesis; Artificial Retina;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Wentai Liu, Kasin Vichienchom, Mark Clements, Stephen C. DeMarco, Chris Hughes, Elliot McGucken, Mark S. Humayun, Eugene de Juan, James D. Weiland, and Robert Greenberg, "A neuro-stimulus chip with telemetry unit for retinal prosthetic device," IEEE Journal of Solid-State Circuits, vol. 35, no. 10, pp. 1487-1497, 2000.   DOI   ScienceOn
2 Kuanfu Chen, Zhi Yang, Linh Hoang, James Weiland, Mark Humayun, and Wentai Liu, "An integrated 256-channel epiretinal prosthesis," IEEE Journal of Solid-State Circuits, vol. 45, no. 9, pp. 1946-1956, 2010.   DOI   ScienceOn
3 Tokuda, T., Hiyama, K., Sawamura, S., Sasagawa, K., Terasawa, Y., Nishida, K., Kitaguchi, Y., Fujikado, T., Tano, Y., and Ohta, J., "CMOS-based multichip networked flexible retinal stimulator designed for image-based retinal prosthesis," Electron Devices, IEEE Transactions on, vol. 56, no. 11, pp. 2577-2585, 2009.   DOI   ScienceOn
4 Theogarajan, L.S., "A low-power fully implantable 15-channel retinal stimulator chip," IEEE Journal of Solid-State Circuits, vol. 43, no. 10, pp. 2322-2337, 2008.   DOI   ScienceOn
5 Bomin Kwon, Jinwoo Jung, Jiman Kim, Yongsu Park, and Hanjung Song, "Design of the low noise CMOS LDO regulator for a low power capacitive sensor interface," J. Kor. Sensors Soc., vol. 19, no. 1, pp. 25-30, 2010.   과학기술학회마을   DOI   ScienceOn
6 In Sook Kim, Jong Keun Song, Yu Lian Zhang, Tae Hyung Lee, Tae Hyung Cho, Yun Mi Song, Do Kyun Kim, Sung June Kim, and Soon Jung Hwang, "Biphasic electric current stimulates proliferation and induces VEGF production in osteoblasts," Biochimica et Biophysica Acta (BBA)-Molecular Cell Research, vol. 1763, no. 9, pp. 907-916, 2006.
7 Valerie C. Scanlon, Essentials of Anatomy and Physiology, 5th edition, F. A. Davis Company, Philadelphia, pp. 203-206, 2007.
8 Ortmanns, M., Rocke, A., Gehrke, M., Tiedtke, and H.-J., "A 232-channel epiretinal stimulator ASIC," Solid-State Circuits, IEEE Journal of, vol. 42, no. 12, pp. 2946-2959, 2007.   DOI   ScienceOn