earticle

영어

In this paper, modified architecture of CMOS capacitive fingerprint sensor readout circuit is presented for general type of a switched capacitive integrator scheme. The proposed architecture supports wide and flexible operation range without ADC. It also operates faster than a typical integrator scheme for one frame image capture. The circuit includes an analog comparator in each pixel and counters. The referenced analog voltage of each sensor cell is controlled by an external or internal bias.