Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Implementation of Wireless Charger with the Function of Auto-Shutdown for fully Implantable Middle Ear Hearing Devices

완전 이식형 인공중이를 위한 자동 충전종료형 무선 충전장치의 구현

  • Lee, Jang-Woo (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Lim, Hyung-Gyu (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Jung, Eui-Sung (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Han, Ji-Hun (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Lee, Seung-Hyun (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Park, Il-Yong (Advanced Research Center for Recovery of Human Sensibility, Kyungpook National University) ;
  • Cho, Jin-Ho (School of Electrical Engineering and Computer Science, Kyungpook National University)
  • 이장우 (경북대학교 대학원 전자전기컴퓨터학부) ;
  • 임형규 (경북대학교 대학원 전자전기컴퓨터학부) ;
  • 정의성 (경북대학교 대학원 전자전기컴퓨터학부) ;
  • 한지훈 (경북대학교 대학원 전자전기컴퓨터학부) ;
  • 이승현 (경북대학교 대학원 전자전기컴퓨터학부) ;
  • 박일용 (경북대학교 첨단감각기능회복장치연구소) ;
  • 조진호 (경북대학교 대학원 전자전기컴퓨터학부)
  • Published : 2007.08.30
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Abstract

In the paper, a wireless charger with the function of auto-shutdown for fully implantale middle ear hearing devices (F-IMEHD) has been designed. The wireless charger can communicate with an implant module to be turned off automatically shutdown after an internal rechargeable battery has been fully-charged by electromagnetic coupling using two coils. For the communication with an implant module, the wireless charger uses the load shift keying (LSK) method. But, the variation of the mutual inductance due to the different distance between two coils can cause the communication error in receiving the fully-charged signal from an implant module. To solve the problem, the implemented wireless charger has a variable reference generator for LSK communication. The wireless charger generates proper level of the reference voltage for a comparator using an ADC (analog-to-digital converter) and a DAC (digital-to-analog converter). Through the result of experiment, it has been confirmed that the presented wireless charger can detect signals from implantable module. And wireless charger can stop generating electromagnetic flux after an implanted battery has been fully charged in spite of variable coil distance according to different skin thickness.

Keywords

References

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