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. 2012 Jul 31;12(8):10381–10394. doi: 10.3390/s120810381

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© 2012 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 11. — Comparison of power consumption (left) and Number of Op-amp (right): (a) 8 channels EEG sensor platform using Zigbee communication; (b) Previous 4 channels multi-body sensor platform using Bluetooth communication; (c) Enhanced 4 channels multi-body sensor platform using Bluetooth communication.