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http://dx.doi.org/10.6109/jkiice.2011.15.6.1343

Low Power Detection Circuit for a Capacitive Fingerprint Sensor  

Jung, Seung-Min (한신대학교 IT대학 디지털융합학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.15, no.6, 2011 , pp. 1343-1348 More about this Journal
Abstract
A modified capacitive detection circuit of charge sharing scheme is proposed, which reduces the static power dissipation and increases the voltage difference between a ridge and valley more than a conventional circuit. The detection circuit is designed and simulated in 3.3V, $0.35{\mu}m$ standard CMOS process, 40MHz condition. The result shows about 47% power dissipation reduction and 90% improvement of difference between a ridge and valley sensing voltage. The proposed circuit is layout without area increasing of a one pixel.
Keywords
Sensor detection; Capacitive; Fingerprint sensor; Power consumption; charge-sharing;
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