local skew, global skew & useful skew

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Netrapal
Posts: 19
Joined: Sat May 10, 2014 10:26 pm
Location: Gurgaon, India

local skew, global skew & useful skew

Post by Netrapal » Sat May 10, 2014 10:42 pm

what is local skew, global skew, useful skew means?

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Narveer
Posts: 59
Joined: Tue Apr 08, 2014 11:29 am
Location: Bangalore, INDIA

Re: local skew, global skew & useful skew

Post by Narveer » Sun May 11, 2014 11:41 am

Local skew : The difference between the clock reaching at the launching flop vs the clock reaching the destination flip-flop of a timing-path.

Global skew : The difference between the earliest reaching flip-flop and latest reaching flip-flop for a same clock-domain.

Useful skew: Useful skew is a concept of delaying the capturing flip-flop clock path, this approach helps in meeting setup requirement with in the launch and
capture timing path. But the hold-requirement has to be met for the design.

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