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Sensors 2011, 11(7), 7022-7036;

An Asynchronous Multi-Sensor Micro Control Unit for Wireless Body Sensor Networks (WBSNs)

Instrumentation Chip Group, Department of Electric Engineering, National Cheng Kung University, Tainan 701, Taiwan
Graduate Institute of Electrical Engineering, National Taipei University, Taipei 10478, Taiwan
Author to whom correspondence should be addressed.
Received: 12 May 2011 / Revised: 30 June 2011 / Accepted: 5 July 2011 / Published: 6 July 2011
(This article belongs to the Special Issue Bioinspired Sensor Systems)
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In this work, an asynchronous multi-sensor micro control unit (MCU) core is proposed for wireless body sensor networks (WBSNs). It consists of asynchronous interfaces, a power management unit, a multi-sensor controller, a data encoder (DE), and an error correct coder (ECC). To improve the system performance and expansion abilities, the asynchronous interface is created for handshaking different clock domains between ADC and RF with MCU. To increase the use time of the WBSN system, a power management technique is developed for reducing power consumption. In addition, the multi-sensor controller is designed for detecting various biomedical signals. To prevent loss error from wireless transmission, use of an error correct coding technique is important in biomedical applications. The data encoder is added for lossless compression of various biomedical signals with a compression ratio of almost three. This design is successfully tested on a FPGA board. The VLSI architecture of this work contains 2.68-K gate counts and consumes power 496-μW at 133-MHz processing rate by using TSMC 0.13-μm CMOS process. Compared with the previous techniques, this work offers higher performance, more functions, and lower hardware cost than other micro controller designs. View Full-Text
Keywords: asynchronous; micro control unit; multi-sensor; wireless body sensor network asynchronous; micro control unit; multi-sensor; wireless body sensor network
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Chen, C.-A.; Chen, S.-L.; Huang, H.-Y.; Luo, C.-H. An Asynchronous Multi-Sensor Micro Control Unit for Wireless Body Sensor Networks (WBSNs). Sensors 2011, 11, 7022-7036.

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