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High Performance Circuit Design of a Capacitive Type Fingerprint Sensor Signal Processing  

정승민 (연세대학교 전기전자공학과)
이문기 (연세대학교 전기전자공학과)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.41, no.3, 2004 , pp. 109-114 More about this Journal
Abstract
This paper proposes an advanced circuit for the fingerprint sensor signal processing. We increased the voltage between ridge and valley by modifying the parasitic capacitance eliminating circuit of sensor plate. The analog comparator was designed for comparing the sensor signal voltage with the reference signal voltage. We also propose an effective isolation strategy for removing noise and signal coupling of each sensor pixel. The fingerprint sensor circuit was designed and simulated, and the layout was performed.
Keywords
지문센서;용량 형;신호처리회로;기생 캐패시턴스;
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  • Reference
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