CMOS数字图像传感器研究进展

Development of CMOS Digital Image Sensor

CMOS图像传感器已从无源和有源像素结构发展到数字图像传感器(DPS),数字图像传感器是CMOS图像传感器的发展方向,DPS的优势在于可把整个图像系统集成在一块芯片上,构成单芯片成像系统,从而降低成本,节约系统功耗,改善成像质量.片上集成模数转换器(ADC)是CMOS图像传感器的关键部件,重点分析和比较了三类不同集成方式:芯片级、列级和像素级的原理、性能和特点.介绍了目前国内外数字图像传感器的发展现状及其未来的发展趋势.

The CMOS image sensor has developed from passive pixel sensors and active pixel sensors to digital sors （DPS） ,which is the trend of image sensors. The advantage of DPS is that the imaging system can be int pixel senegrated on a chip as imaging system-on-a-chip, decreasing the cost and power consumption, improving the imaging quality. The A/D conversion is the key component of the CMOS sensor. The authors analyze and compare the theories, performances and features of the chip level, column level and pixel level integrated ADC of the image sensor, They present the present and the future trend of the development about digital image sensor in the home and abroad.