Design of an EEG Preamplifier for Brain-Computer Interface |
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Authors: | Xian-Jie Pu Tie-Jun Liu De-Zhong Yao |
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Affiliation: | Key Laboratory for NeuroInformation of Ministry of Education,School of Life Science and Technology,University of Electronic Science and Technology of China,Chengdu,610054,China |
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Abstract: | As a non-invasive neurophysiological index for brain-computer interface (BCI),electro-encephalogram (EEG) attracts much attention at present.In order to have a portable BCI,a simple and efficient pre-amplifier is crucial in practice.In this work,a preamplifier based on the characteristics of EEG signals is designed,which consists of a highly symmetrical input stage,low-pass filter,50 Hz notch filter and a post amplifier.A prototype of this EEG module is fabricated and EEG data are obtained through an actual experiment.The results demonstrate that the EEG preamplifier will be a promising unit for BCI in the future. |
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Keywords: | Brain-computer interface (BCI) electroencephalogram (EEG) filtering interference pre amplifier |
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