A Fingerprint Sensor with Pipelined Scan Driver for Mobile Applications
Hyeopgoo Yeo · International Journal of Multimedia and Ubiquitous Engineering · 2016
This paper proposes a pipelined scan driver architecture for a fingerprint sensor based on an integrator. The proposed pipelined scan driver secures enough time to integrate sensor signals of a fingerprint sensor because a fingerprint sensor based on an integrator requires a large number of clocks to get sensor signals of reasonable SNR. Therefore, the proposed pipelined scan driver reduces an overall image capture time effectively without performance degradation by integrating the sensor signals for several sensor cells simultaneously. A prototype 88x2 array fingerprint sensor combined with the proposed pipelined scan driver were designed in this paper. The implemented pipelined scan driver was simulated with Verilog HDL for the functional verification. The 88x2 fingerprint sensor with a synthesized pipelined scan driver were implemented and simulated using a standard 0.18μm CMOS technology. The simulation results were presented and analyzed in this paper.