A Novel Design of Transcutaneous Power and Data Bidirectional Transfer System for Biomedical Implants
Electrical stimulation of the optic nerve has been identified as a form of visual prosthesis to restore lost vision in blind patients affected by retinitis pigmentosa and age-related macular degeneration, through many studies and experiments. Magnetic transcutaneous coupling is frequently used for power transfer to implanted electronic devices. In such a prosthetic device, how to improve the power transfer efficiency and how we can get a precise DC voltage output are the two of the most challengeable elements in the whole system design. This paper presents the use of a transmitter coil driver based on the Class- E amplifier. The closed-loop Class-E circuit shows a great promise, especially for the circuits with unusually low coefficients of coupling. The transfer system is designed to a high-Q system and it can compensate for the transmitter and receiver variations via a smart feedback system. The system is optimized to minimize the power losses. This paper also describes the design of a data transfer system. This part can deliver the processed digital information that is useful for the implanted stimulator from the external side to the internal side (implant).
Yang Zhou Jinhai Niu Ye Zhou Shuai Niu Xinyu Chai Qiushi Ren
Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R.China Institute for Laser Medicine & Bio-Photonics, Shanghai Jiao Tong University, Shanghai 200240, P.R.Ch
国际会议
北京
英文
1466-1469
2007-05-23（万方平台首次上网日期，不代表论文的发表时间）