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Bien, Franklin
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A Multi-Purpose Fingerprint Readout Circuit Embedding Physiological Signal Detection

Author(s)
Eom, Won-JinKim, Sung-WooPark, KyeonghwanBien, FranklinKim, Jae Joon
Issued Date
2016-12
DOI
10.5573/JSTS.2016.16.6.793
URI
https://scholarworks.unist.ac.kr/handle/201301/21089
Fulltext
http://www.jsts.org/html/main.htm
Citation
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, v.16, no.6, pp.793 - 799
Abstract
A multi-purpose sensor interface that provides dual-mode operation of fingerprint sensing and physiological signal detection is presented. The dual-mode sensing capability is achieved by utilizing inter-pixel shielding patterns as capacitive amplifier’s input electrodes. A prototype readout circuit including a fingerprint panel for feasibility verification was fabricated in a 0.18 mm CMOS process. A single-channel readout circuit was implemented and multiplexed to scan two- dimensional fingerprint pixels, where adaptive calibration capability against pixel-capacitance variations was also implemented. Feasibility of the proposed multi-purpose interface was experimentally verified keeping low-power consumption less than 1.9 mW under a 3.3 V supply.
Publisher
IEEK PUBLICATION CENTER
ISSN
1598-1657
Keyword (Author)
Multi-sensor interfacefingerprint sensorphysiological sensorreadout integrated circuitdual-mode operation
Keyword
SENSORS

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