Title :
A relative comparative based datapath for increasing resolution in a capacitive fingerprint sensor chip
Author :
Ojha, Mukul Milind ; Anand, Arun Kumar ; Visweswaran, G.S. ; Nagchoudhuri, D.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Delhi, India
Abstract :
This paper discusses a datapath design in which, the outputs of two adjacent cells are compared to distinguish between a ridge and a valley in a capacitive fingerprint sensor chip. A new switching scheme has been discussed which gives larger voltage differential (corresponding to ridge and valley) at the end of bit lines. Modifications are implemented for a small area of sensing cell to increase the DPI.
Keywords :
data flow computing; digital signal processing chips; fingerprint identification; image resolution; image sensors; integrated circuit design; switching; DPI; bit lines; capacitive fingerprint sensor chip; datapath design; resolution increase; sensing cell; switching; voltage differential; Capacitive sensors; Capacitors; Clocks; Delay; Fingerprint recognition; Fingers; Parasitic capacitance; Sensor arrays; Temperature sensors; Voltage;
Conference_Titel :
VLSI Design, 2005. 18th International Conference on
Print_ISBN :
0-7695-2264-5
DOI :
10.1109/ICVD.2005.32
