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Advanced Circuits for Emerging Technologies by Krzysztof Iniewski

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Chapter 7

Ultralow Power Management Circuit for Optimal Energy Harvesting in Wireless Body Area Network

Yen Kheng Tan

Energy Research Institute, Nanyang Technological University, Singapore

Yuanjin Zheng and Huey Chian Foong

Nanyang Technological University, Singapore

7.1 Introduction

With the recent advance in highly integrated microelectronics CMOS technology, various key technologies like wireless communication, sensors, processing, power electronics, etc., have evolved. Mobile, wireless, pervasive computing, and communication environments are changing the way medical staffs interact with their patients and the elderly. By deploying self-organized wireless physiological-monitoring hardware/software systems known as wireless body area network (WBAN), continual patient monitoring in certain types of patient postures becomes convenient to assuring timely intervention by a healthcare practitioner or a physician. For example, cardiac patients wearing electrocardiogram (ECG) sensor systems can be monitored remotely without leaving their residence. Healthcare sensor systems are required to be connected directly or indirectly to the Internet at all times, which allows medical staff to timely acquire arrhythmia events and abnormal ECG signals for correcting medical procedures. Moreover, physiological records are collected over a long period of time so that physicians can provide accurate diagnoses and correct treatment.

7.2 Wireless Body Area Network

Rapid advances in science and technology ...

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