JSSC 2012第6期Image Sensors0.18μm CMOS

A 1500 fps Highly Sensitive 256 256 CMOS Imaging Sensor With In-Pixel Calibratio

一种高灵敏度、低噪声的256x256 CMOS图像传感器，支持1500 fps高速成像，采用像素内校准技术。

1500 fps, 68.5 V/lux·s灵敏度, 0.7 fF积分电容

高速CMOS图像传感器像素内校准电容性跨阻放大器相关双采样微计算机断层扫描

▸新型电容性跨阻放大器（CTIA）像素设计

▸像素内相关双采样（CDS）技术

▸片上校准方案补偿像素间失配

Abstract

High-speed CMOS imaging sensors (CIS) norma lly have low sensitivity because of the large integration capacitance. They also have high noise because pixel circuits cannot imple- ment correlated double sampling (CDS) to remov e the pixel reset noise. For applications, such as micro-computed tomography (micro-CT), this is a major limitation. In this work, we devel- oped a technique to achieve high sensitivit ya n dl o wn o i s ef o r high-speed CIS. To maximize the sensitivity, we designed a new c