Implantable RF Power Converter for Small Animal In Vivo Biological Monitoring 指導教授:林志明 教授 級別:碩一 學生:張家瑋 Proceedings of the 2005 IEEE Engineering in Medicine.

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Implantable RF Power Converter for Small Animal In Vivo Biological Monitoring 指導教授:林志明 教授 級別:碩一 學生:張家瑋 Proceedings of the 2005 IEEE Engineering in Medicine and Biology 27th Annual Conference Shanghai, China, September 1-4, 2005 Nattapon Chaimanonart(1), Keith R. Olszens(2), Mark D. Zimmerman(1), Wen H. Ko(1), and Darrin J. Young(1) (1)Electrical Engineering and Computer Science Department, (2)School of Medicine, Case Western Reserve University Euclid Avenue, Cleveland, OH 44106, USA

Outline ‧ Abstract ‧ Introduction ‧ Implant System Architecture ‧ Measurement Results ‧ Conclusion ‧ References

Abstract ‧ A miniature, long-term, implantable radio frequency (RF) power converter for freely moving small animal in vivo biological monitoring is proposed. ‧ 6 mm x 6 mm x 1 mm and a weight of 100 mg ‧ medical-grade silicone coating ‧ can wirelessly receive an input RF power

Introduction. Biological information : such as blood pressure, temperature, activity, and bio- potential signals.. RF-powering system, the implant size and weight can be significantly reduced.

Implant System Architecture

Measured Voltage Gain vs. Operating Frequency with Different External Coil Turn Numbers

Conclusion. A miniature, long-term, implantable RF power converter for freely moving small animal in vivo biological monitoring is proposed.. An optimal voltage gain of 3.5 can be achieved with a 10 MHz operating frequency.

REFERENCES [1] W. Liu and M. S. Humayun, “ Retinal Prosthesis, ” Technical Digest, IEEE International Solid-State Circuits Conference, pp. 218 – 225, February [2] J. Ji and K. D. Wise, “ An implantable CMOS circuit interface for multiplexed microelectrode recording arrays, ” IEEE Journal of Solid-State Circuits, Vol.27, Issue 3, pp. 433 – 443, March [3] J. A. Von Arx and K. Najafi, “ A wireless single-chip telemetry-powered neural stimulation system, ” Technical Digest, IEEE International Solid-State Circuits Conference, pp. 214 – 215, February 1999.

[4] P. R. Troyk and G. A. DeMichele, “Inductivelycoupled power and data link for neural prostheses using a class-E oscillator and FSK modulation,” IEEE International Conference Engineering in Medicine and Biology Society, Vol. 4, pp – 3379, September [5] N. Chaimanonart, W. H. Ko, D. J. Young, “Remote RF Powering System for MEMS Strain Sensors,” Technical Digest of The Third IEEE International Conference on Sensors, pp –1525, October [6] W. H. Ko, S. P. Liang, and C. D. Fung, “Design of radio-frequency powered coils for implant instruments,” Medical & Biological Engineering & Computing, Vol. 15, pp. 634 – 640, 1997.