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[Synthesis] Buffering vs Cloning

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ivlsi

ivlsi

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Hi All,

Both the Buffering and Cloning techniques are used to reduce the fanout (transition time) of the circuit.

When the Buffering is preferred over the Cloning and vice versa?

Thank you!
 

Buffering is good for long wires, cloning for short ones...

Are there another opinions?
 

the Cloning is preferred when we want to distribute the load of ICG cells.
 
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    ivlsi

    ivlsi

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the Cloning is preferred when we want to distribute the load of ICG cells
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Okay, so is cloning mainly for improving clock slops (clock transition time) rather than data slops (data transition time)?
 

What cases where the timing could be fixed only by cell cloning and not by buffering (and vice versa)?
 

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