what is the difference between the two Buffer situations

[owen_li]

We know, We use buffers inserted to eliminate hold time violation.
And, we also know we use buffer inserted on clock tree to reduce the delay
from clock root to register clock pin. Why do the two buffer situations give
opposite function. What is the difference between them.
Thank you very much!

 

[pratap_v]

As per my knowledge we do clock tree buffering to balance all the clock paths and reduce the skew even. This is to check if the clock is reaching all the sync pins at the same time or with in the limits.
we also insert buffers mostly in the data path to avoid hold violations to increase the delay in these paths. so arriving the capture clock is made late and hold violation is avoided.

 

[phutanesv]

Dear owen_li
The diffrence is one buffer in Clock path

and other in data path.

So need of two buffers

Simple