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Sensors 2010, 10(5), 4777-4793; doi:10.3390/s100504777

A Power-Efficient Bio-Potential Acquisition Device with DS-MDE Sensors for Long-Term Healthcare Monitoring Applications

1 Instrumentation Chip Group, Department of Electric Engineering, National Cheng Kung University, Tainan 701, Taiwan 2 Department of Electrical Engineering, National Chiao Tung University, Hsinchu, Taiwan 3 Graduate Institute of Electrical Engineering, National Taipei University, Taipei, Taiwan 4 School of Medicine, China Medical University, No. 91, Hsueh-Shih Road, Taichung, Taiwan
* Author to whom correspondence should be addressed.
Received: 2 March 2010 / Revised: 21 April 2010 / Accepted: 27 April 2010 / Published: 11 May 2010
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This work describes a power-efficient bio-potential acquisition device for long-term healthcare applications that is implemented using novel microelectromechanical dry electrodes (MDE) and a low power bio-potential processing chip. Using micromachining technology, an attempt is also made to enhance the sensing reliability and stability by fabricating a diamond-shaped MDE (DS-MDE) that has a satisfactory self-stability capability and superior electric conductivity when attached onto skin without any extra skin tissue injury technology. To acquire differential bio-potentials such as ECG signals, the proposed processing chip fabricated in a standard CMOS process has a high common mode rejection ratio (C.M.R.R.) differential amplifier and a 12-bit analog-to-digital converter (ADC). Use of the proposed system and integrate simple peripheral commercial devices can obtain the ECG signal efficiently without additional skin tissue injury and ensure continuous monitoring more than 70 hours with a 400 mAh battery.
Keywords: DS-MDE; bio-potential acquisition chip; long-term ECG monitoring DS-MDE; bio-potential acquisition chip; long-term ECG monitoring
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Chang, C.-L.; Chang, C.-W.; Huang, H.-Y.; Hsu, C.-M.; Huang, C.-H.; Chiou, J.-C.; Luo, C.-H. A Power-Efficient Bio-Potential Acquisition Device with DS-MDE Sensors for Long-Term Healthcare Monitoring Applications. Sensors 2010, 10, 4777-4793.

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