一种基于列并行读出的数字化CCD图像传感器

Design of a High-speed CMOS Image Sensor for Hyperspectral Imaging

摘要:

本文介绍了一种用于高光谱成像的高速CMOS图像传感器,重点介绍了感光像素与读出电路设计。通过设计,像素具备了全局快门功能,列级电路实现了输出通道数可选功能,并优化了大面阵、低输出通道数情况下的高速模拟信号输出。最终实现的像素阵列大小为2048×256,像素尺寸为24um×24um,单通道最大输出频率为40Mpixel/s,最高帧频为4000fps,可满足高光谱成像系统对图像传感器的需求。

Abstract:

A high-speed CMOS image sensor for hyperspectral imaging, the design of pixel and readout circuit being the main part, is introduced in this paper: the pixel is capable of global shutter function; the number of output channel of the readout circuit can be chosen from certain values, and high-speed analog signal output performance under the condition of large array area and low output channel number is optimized. The pixel array size in the final design is 2048×256, and pixel pitch is 24um×24um; the maximum output frequency for single output channel is 40Mpixel/s, and the maximum frame rate can reach 4000fps. This image sensor can meet the general requirement of a hyperspectral imaging system.