Abstract
This paper describes sensor structure, circuit and system techniques for a capacitive fingerprint sensor LSI and a user authentication system. The LSI must be reliable, sensitive, and tolerant to changes in the sensor surface conditions for capturing clear fingerprint image over long-term use. The LSI features a sensor structure, sensing circuit, calibration circuit and adjustable A/D convener. The system has to provide the controllability of captured fingerprint images to be suitable for identification under various conditions. The system features an adaptive fingerprint-sensing scheme. The fingerprint sensor LSI was fabricated using the 0.5-/spl mu/m CMOS process/sensor process and the fingerprint identification system was developed with the above techniques. The sufficient performance was achieved for a practical user authentication system and the effectiveness of the fingerprint sensor technology was confirmed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
