센서학회지 (Journal of Sensor Science and Technology)

  • 제14권1호
  • /
  • Pages.28-32
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  • 2005
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  • 1225-5475(pISSN)
  • /
  • 2093-7563(eISSN)
한국센서학회 (The Korean Sensors Society)
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용량형 지문인식센서를 위한 전하분할 방식 감지회로의 CMOS 구현

A CMOS integrated circuit design of charge-sharing scheme for a capacitive fingerprint sensor

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

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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참고문헌

  1. J. W. Lee, D. J. Min, J. Y. Kim, and W. C. Kim, 'A 600-dpi Capacitive Fingerprint Sensor Chip and Image-Synthesis Technique', IEEE J. of Solid-state Circuits, vol. 34, No. 4, pp. 469-475, April, 1999 https://doi.org/10.1109/4.753679
  2. M. Tartagnj and R. Guerrieri, 'A Fingerprint Sensor Based on the Feedback Capacitive Sensing Scheme', IEEE J, of Solid-state Circuits, vol. 33, pp. 133-142, Jan. 1998 https://doi.org/10.1109/4.654945
  3. D. Inglis et al., 'A Robust 1.8 V 250 usW Direct-Contact 500 dpi Fingerprint Sensor', ISSCC Digest of Technical Papers, Feb. pp. 284-285, 1998
  4. H. Morimura, S. Shigematsu, and K. Machida, 'A Novel Sensor Cell Architecture and Sensing Circuit Scheme for Capacitive Fingerprin Sensors', IEEE J. of Solid-state Circuits, vol. 35, pp. 724-731, May. 2000 https://doi.org/10.1109/4.841500