生醫微系統之電源管理設計

配合國內生醫及電子科技發展，植入式醫療器材逐漸成為研發重點之一，以現今技術而言，設計一套適用於生醫微系統之電源管理架構，仍具有相當多的困難與挑戰。有別於消費性電子，植入式裝置所需強調的電路特性迥然不同，特別針對於雜訊、功率、溫度、面積等需更嚴格的探討。研究中所提出之電源管理系統，結合可充式電池與無線功率傳輸供電，可廣泛應用於植入式生醫裝置中，達到控管電源遙傳系統、回授監測系統與特殊應用系統等多向電能供應路徑。本研究發展出一套新的電源管理方式，可避免微控制器作為驅動與管理核心，提供多種模式及切換管理，並設置定時驅動電路，在特定週期內開關二階穩壓電路達到節省電池電量之效果，系統中針對生醫裝置之需求開發出新的溫度感測系統及溫度回授調節之充電策略，達到連續溫度監測及低溫變異之充電方式，對於體內接收介面電能管理則提出系統起始致能電路、電能回授調節控制電路增加供電系統穩定度，同時配合各部分之需求研發定功率多準位比較器，大量降低功率及面積。全系統以TSMC 0.35μm Mixed-Signal 2P4M Polycide 3.3/5V製程混合設計，並將各電晶體設計在平緩區操作，降低系統消耗功率，達到最佳性能之需求。

關鍵字

比較器；電池充電器；生醫微系統；電源管理；溫度感測

並列摘要

In recent years, considerable attention has been given to the development of electronics and biomedical technology, especially in the research of implantable medical devices. Recently, substantial difficulties and challenges have arisen in designing the power management system of biomedical devices. This project presents a novel power management system that widely applies to implantable medical devices, controlling the power transceiver output, monitor and simultaneously have special applications in the power path. A microcontroller unit (MCU) will be used as the core of the driver and as power management regulator, which will be implemented using ASIC (Application Specific Integrated Circuits) to reduce power and area consumption. Furthermore, a new temperature sensor and a temperature feedback regulated charger were designed for long term monitoring and small temperature variations. We also present a system-on-enable (SOE) circuit and power feedback to increase system stability and accuracy, developed fixed power on the multi-level comparator to reduce power and area consumption at the same time. The whole system was fabricated in a TSMC 0.35μm 2P4M 3.3/5V CMOS technology and designed the transistors in moderate inversion region to arrive at high performance and low power consumption.

並列關鍵字

Comparator ； Biomedical system ； Power management ； Temperature sensor ； Battery charger

參考文獻

[65] Brian M. King, “Advantages of Using PMOS-Type Low-Dropout Linear Regulators in Battery Applications,” Texas Instrument Inc., Analog Application Journal, pp. 16-21, Aug. 2000.

[24] Nathan A. Torgerson and James E. Riekels, “Battery Recharge Management for an Implantable Medical Devices,” U.S. Patent 7,167,756, Jan. 23, 2007.

[47] Chia-Feng Chang, “Preparation of Solid Electrolytes in Thin Film Lithium Ion Battery,” Department of Materials Science and Engineering, National Tsing Hua University, Doctoral Dissertation.

[48] Mikito Nagata, Ashok Saraswat, Hiroshi Nakahara, Hiroyuki Yumoto, David M. Skinlo, Kaname Takeya and Hisashi Tsukamoto, “Miniature Pin-type Lithium Batteries for Medical Applications,” J. Power Sources, Vol. 146, pp. 762-765, Aug. 2005.

[73] Mehrmanesh S., Vahidfar M.B., Aslanzadeh H.A. and Atarodi M., “A 1-volt, high PSRR, CMOS bandgap voltage reference,” in Proc. IEEE Circuits and Systems Conf., May. 2003, Vol. 1, pp. 25-28.

國際替代計量

生醫微系統之電源管理設計

全文下載

主題瀏覽