Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Current Stimulator with Adaptive Supply Regulator for Artificial Retina Prosthesis

적응형 가변 전원 레귤레이터를 내장한 인공 망막용 전류 자극기

  • Ko, Hyoung-Ho (Department of Electronics, Chungnam National University)
  • 고형호 (충남대학교 전자공학과)
  • Received : 2011.03.24
  • Accepted : 2011.07.14
  • Published : 2011.07.31
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Abstract

In this paper, a current stimulator circuit with adaptive supply regulator for retinal prosthesis is proposed. In current stimulation systems, the stimulating circuits with wide voltage swing range are needed due to the high impedance of the retina cell and microelectrodes. Thus, previous researches adopt the high voltage architecture to obtain the enough operating range. The high voltage architecture, however, could increase the power consumption and can damage the retina cells. The proposed circuit provides the adaptively regulated supply voltage by measuring the difference between desired stimulation current and the actual stimulation current. The proposed circuit can achieve the extended range of the allowable cell impedance, improved accuracy of the stimulation current, and higher biosafety.

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References

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