A CMOS Fingerprint Sensor Based on Skin Resistivity

Author

Audet, Yves ; Aubray, Laurent ; Blouin, Dominique

Author_Institution

Polytechnique de Montreal, Que.

fYear

2006

fDate

38869

Firstpage

269

Lastpage

272

Abstract

A novel fingerprint integrated sensor using skin resistivity variation resulting from ridges and valleys on the fingertip is presented. This straightforward detection principle leads to a simpler reading circuitry compared to other integrated fingerprint sensors. The skin resistivity pattern is detected by sweeping the fingertip over a line of 256 pixels. The analog circuits include the pixel input protection against electrostatic discharge, a variable current source, an automatic gain control, and a 1-bit analog to digital converter. The sensor circuit blocks were designed and simulated in a CMOS 0.35 mum process

Keywords

CMOS image sensors; analogue circuits; analogue-digital conversion; automatic gain control; electrostatic discharge; fingerprint identification; 0.35 micron; 1 bit; 256 pixels; CMOS fingerprint sensor; analog circuits; analog to digital converter; automatic gain control; electrostatic discharge; pattern detection; skin resistivity; variable current source; Analog circuits; Analog-digital conversion; CMOS process; Circuit simulation; Conductivity; Electrostatic discharge; Fingerprint recognition; Gain control; Protection; Skin; CMOS integrated circuits; electrostatic discharge (ESD); fingerprint; sensor;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006 IEEE North-East Workshop on

Conference_Location

Gatineau, Que.

Print_ISBN

1-4244-0416-9

Electronic_ISBN

1-4244-0417-7

Type

conf

DOI

10.1109/NEWCAS.2006.250922

Filename

4016953