bad rise time in eye diagram link to speed

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Hello,In the eye diagram bellow the top Wall distortion is caused by transmition line induction voltage drop.
the side wall low slope (big rise time)could be caused by high data rate .
why high data rate causes the slope to decrease thus getting high rise time?
Thanks.

 

Hi,

High datarate means the edge to edge time becomes smaller.
Thus the time in the eye diagram becomes smaller.
While dv/dt stays constant it "just looks like" in the picture the slope decreases.

At least this is how I interprete your worries.

Klaus
 

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