PFD noise contribution in PLL

[easyads]

We know that PFD, Charge pump,LOOP filter all contribute in-band noise for an integer-N PLL. Which is the main noise sources to contribute in-band noise, PFD or charge pump,or other block?[/img]

 

[jecyhale]

I think it should be Charge pump. and the resistor of LOOP　Ｆｉｌｔｅｒ　ｗｉｌｌ　ｃｏｎｔｒｂｕｔｅ　ａｌｓｏ．

 

[easyads]

Thanks for your reply.
We know that if the on time Ton of Charge pump decreases, the noise of Charge pump will also decrease. So i think if Ton is very small(about 1ns), the noise of Charge pump will be very negligible. And I think the loop filter will contribute the majority in band noise of PLL.
Please comment on my idea.