Title :
A CMOS-only micro touch pointer
Author :
Manaresi, N. ; Rambaldi, R. ; Tartagni, M. ; Vajna, Z.M.K. ; Guerrieri, R.
Author_Institution :
Dipt. di Elettronica Inf. e Sistemistica, Bologna Univ., Italy
Abstract :
A direct-contact finger mouse realized in 0.7-/spl mu/m digital CMOS is presented. It is based on the motion detection of the fingerprint images acquired with a capacitive sensor. Stroking and tapping the chip surface with the finger causes movement of the cursor and clicking-like mouse. By properly partitioning analog collective computation and digital processing, a power consumption of about 900 /spl mu/W at 5 V is achieved. The sensor area is 3.8/spl times/3.8 mm/sup 2/, and overall chip size is 7.7/spl times/6.7 mm/sup 2/.
Keywords :
CMOS integrated circuits; capacitive sensors; intelligent sensors; interactive devices; low-power electronics; mixed analogue-digital integrated circuits; pattern recognition equipment; 0.7 micron; 3.8 mm; 5 V; 6.7 mm; 7.7 mm; 900 muW; CMOS-only micro touch pointer; capacitive sensor; digital CMOS; direct-contact finger mouse; fingerprint images; motion detection; CMOS image sensors; Capacitive sensors; Energy consumption; Fingerprint recognition; Fingers; Image matching; Image sensors; Intelligent sensors; Mice; Optical sensors;
Journal_Title :
Solid-State Circuits, IEEE Journal of
