Research of Noise Suppression on Source Follower in TDI Image Sensor

In order to promote the applications of image sensor in space observation, 1/f noise from SF (Source Follower) in TDI (Time Delay and Integration) image sensor need to further improve. Three types of SFs are tested, including Nvt (native voltage threshold), Lvt (low voltage threshold) and normal SF. They are designed in different size to verify the optimal design additionally. Comparing the data, Nvt and Lvt SF perform better than normal SF versus noise and Cvg. In small size, less than 1/1μm, Lvt and Nvt SF are on the same level. In large size, greater than 1/1μm, Nvt SF performs better.