Improvement of the performance of EOC Amp in AOC method using microprocessor

마이크로프로세서를 이용한 AOC 방식에서 EOG 앰프 성능 개선

  • 고석남 (원광대학교 전자공학과) ;
  • 이상세 (원광대학교 전자공학과) ;
  • 정호춘 (원광대학교 전자공학과) ;
  • 임승관 (원광대학교 전자공학과) ;
  • 이영석 (원광대학교 전자공학과) ;
  • 진달복 (원광대학교 전자공학과) ;
  • 박병림 (원광대학교 의과대학 생리학교실)
  • Published : 2000.06.01

Abstract

The electronystagmography(ENG) means to measure and record CRP(Corneal-Retinal Potential) whenever the eyeball is moved by using a skin electrode stuck to the hi-temporal and the difference of CRP. Both the horizontal and vertical movement are known according to the position of the stuck skin electrode. In this paper, the variable time-constances to record the eyeball signal of the conventional EOG(Electro-Oculograph) Amplifier is chosen. The shorter the time-constance is, the worse the distortion of a signal is. But the unbalanced impedance of the electrode stuck on the hi-temporal is reduced. Also, the longer the time-constance is, the less the distortion of it signal is. But it is sensitive to the change of base line according to the unbalanced impedance. In order to solve these problems, an DC-Amplifier, the distortion of the eyeball signal is globally used. By solving unbalanced impedance problem of EOG amplifier, the distortion ratio of EOG amplifier is improved.

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