Title :
A 500 dpi capacitive-type CMOS fingerprint sensor with pixel-level adaptive image enhancement scheme
Author :
Kwang-Hyun Lee ; Euisik Yoon
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
Abstract :
A 500 dpi capacitive CMOS fingerprint sensor with pixel-level adaptation image enhancement uses virtually-grounded metal shields to suppress parasitic capacitances and capacitive switching networks to generate local threshold level. A 210×100 sensor in 0.6 μm CMOS consumes 40 mW at 5 V supply.
Keywords :
CMOS image sensors; adaptive signal processing; capacitive sensors; fingerprint identification; image enhancement; image processing equipment; mixed analogue-digital integrated circuits; 0.6 micron; 40 mW; 5 V; CMOS fingerprint sensor; capacitive switching networks; capacitive-type sensor; double-poly three-metal CMOS process; parasitic capacitance suppression; pixel-level adaptive image enhancement scheme; virtually-grounded metal shields; CMOS image sensors; Capacitive sensors; Electrodes; Fingerprint recognition; Fingers; Image enhancement; Parasitic capacitance; Pixel; Skin; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-7335-9
DOI :
10.1109/ISSCC.2002.993077
