Active electrodes for wearable EEG acquisition: review and electronics design methodology

Xu, J., Mitra, S., Van Hoof, C., Yazicioglu, R. F. and Makinwa, K. A.A. (2017) Active electrodes for wearable EEG acquisition: review and electronics design methodology. IEEE Reviews in Biomedical Engineering, 10, pp. 187-198. (doi: 10.1109/RBME.2017.2656388) (PMID:28113349)

Abstract

Active Electrodes (AE), i.e. electrodes with built-in readout circuitry, are increasingly being implemented in wearable healthcare and lifestyle applications due to AE’s robustness to environmental interference. An AE locally amplifies and buffers μV-level EEG signals before driving any cabling. The low output impedance of an AE mitigates cable motion artifacts thus enabling the use of high-impedance dry electrodes for greater user comfort. However, developing a wearable EEG system, with medical grade signal quality on noise, electrode offset tolerance, common-mode rejection ratio (CMRR), input impedance and power dissipation, remains a challenging task. This paper reviews state-of-the-art bio-amplifier architectures and low-power analog circuits design techniques intended for wearable EEG acquisition, with a special focus on AE system interfaced with dry electrodes.

• Item Type: Articles
• Status: Published
• Glasgow Author(s) Enlighten ID: Mitra, Dr Srinjoy
• Authors: Xu, J., Mitra, S., Van Hoof, C., Yazicioglu, R. F., and Makinwa, K. A.A.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: IEEE Reviews in Biomedical Engineering
• Publisher: IEEE
• ISSN: 1937-3333
• ISSN (Online): 1941-1189
• Published Online: 20 January 2017
• Copyright Holders: Copyright © 2017 IEEE
• First Published: First published in IEEE Reviews in Biomedical Engineering 10:187-198
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher