PD型有源像素CMOS图像传感器的噪声抑制技术

In this paper, the pixel structure of photodiode CMOS active pixel image sensor was presented, as well as its operating time sequence. The paper also analyzes all kinds of noise exisited in CMOS image sensor detailedly, and specifies its corresponding supression technologies. The Fixed-Pattern-Noise (FPN) becomes focal point for its major contribution to the entire noise. So the paper details it systemically. Meanwhile, two FPN supression circuits are put forward. At last, according to the outcome resulting from PSPICE simulated environment, where one of the two circuits run, the circuits solves the noise problems effectively.