Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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A CMOS integrated circuit design of charge-sharing scheme for a capacitive fingerprint sensor

용량형 지문인식센서를 위한 전하분할 방식 감지회로의 CMOS 구현

  • Nam, Jin-Moon (Dept. of Electrical & Electronics Eng., Graduate School, Yonsei Univ.) ;
  • Lee, Moon-Key (Dept. of Electrical & Electronics Eng., Graduate School, Yonsei Univ.)
  • 남진문 (연세대학교 대학원 전기전자공학과) ;
  • 이문기 (연세대학교대학원 전기전자공학과)
  • Published : 2005.01.30
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Abstract

In this paper, a CMOS integrated detection circuit for capacitive type fingerprint sensor signal processing is described. We designed a detection circuit of charge-sharing sensing scheme. The proposed detection circuit increases the voltage difference between a ridge and valley. The test chip is composed of $160{\times}192$ array sensing cells (12 by $12.7{\;}mm^{2}$). The chip was fabricated on a 0.35 m standard CMOS process. Measured difference voltage between a ridge and valley was 0.95 V.

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References

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