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Modeling and simulation of CMOS imaging sensor based on Simulink

The CMOS (Complementary Metal Oxide Semiconductor) image sensor becomes increasingly competitive with respect to CCD (the charge-coupled device) except the noise performance. In order to analyze the noise sources of CMOS imagers and then find some methods to reduce noise level of CMOS imagers, a model of the CMOS imager sensor may be first set up. This paper introduces the method of modeling and simulation of CMOS imaging sensor based on SIMULINK. The CMOS imager sensor used in the simulation is LUPA4000 fabricated by Cypress Corporation. Based on this model, parameters of the sensor can be modified and simulation results are then showed clearly. The validity of the model is also confirmed in the last part of this paper. The method introduced in this paper is also suitable to establish the model of other CMOS imaging sensors.