用于低噪声CMOS图像传感器的流水线ADC设计及其成像验证

A pipeline ADC design for low noise CMOS image sensor and verification for digital image

在对低噪声CMOS图像传感器的研究中,除需关注其噪声外,目前数字化也是它的一个重要的研究和设计方向,设计了一种可用于低噪声CMOS图像传感器的12 bit,10 Msps的流水线型ADC,并基于0.5μm标准CMOS工艺进行了流片。最后,通过在PCB测试版上用本文设计的ADC实现了模拟输出的低噪声CMOS图像传感器的模数转换,并基于自主开发的成像测试系统进行了成像验证,结果表明,成像画面清晰,该ADC可作为低噪声CMOS图像传感器的芯片级模数转换器应用。

In recent years, besides concerning about the noise analyzation, the signal digitization is also a very important research spot in the research field of low noise CMOS image sensor. A 12bit, 10Msps pipeline ADC is presented which can be used as a chip-level analog-to-digital converter in a low noise CMOS image sensor, and it was taped-out in the 0.5μm CMOS standard process. Finally, by using of this ADC, an analog-output low-noise CMOS image sensor achieves analog-to-digital convert in a PCB test board, and based on an independent development image-forming system, this test board achieved a very good imaging test. The imaging result shows that this ADC can be used as a chip-level ADC of a low-noise CMOS image sensor.