Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

A high speed 1000 fps CMOS image sensor with low noise global shutter pixels

ZHOU YangFan;CAO ZhongXiang;QIN Qi;LI QuanLiang;SHI Cong;WU NanJian;State Key Laboratory for Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences;  
A low read noise 8T global shutter pixel for high speed CMOS image sensor is proposed in this paper. The pixel has a pixel level sample-and-hold circuit and an in-pixel amplifier whose gain is larger than one. Using pixel level sample-and-hold circuit, the KTC noise on FD node can be effectively cancelled by correlated double sampling operation. The in-pixel amplifier with a gain larger than one is employed for reducing the pixel level sample-and-hold capacitors thermal noise and their geometric size. A high speed 1000 fps 256 × 256 CMOS image sensor based on the pixel is implemented in 0.18 μ m CMOS process. The chip active area is 5 mm × 7 mm with a pixel size of 14 μ m×14 μ m. The developed sensor achieves a read noise level as low as 14.8e- while attaining a high fill factor of 40%. The full well capacity can contain 30840e- and the resulting signal dynamic range is 66 dB.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved