대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)

대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
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EEG를 이용한 마인드 스위치 제작

A Mind Switch using EEG

  • Ahn, Soon-Kwan (School of Electrical Engineering, College of Engineering, Seoul National University) ;
  • Jun, Sang-Beom (School of Electrical Engineering, College of Engineering, Seoul National University) ;
  • Kim, Sung-June (School of Electrical Engineering, College of Engineering, Seoul National University)
  • 발행 : 1998.11.20
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초록

In this experiment, we developed a mind switching device which uses $\alpha$-wave with its amplitude varying between the eye-open and closed states. If the subject closes eyes, the switch toggles with a small delay. The circuit consists of an amplifier, a filter and a switch. An instrument amplifier is used fur high CMRR and for high input impedance. An 8th order Butterworth filter was able to reduce noise satisfactorily. The signal is then converted to a DC level, and finally a Schmitt trigger was used to generate a switching pulse.

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