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Difference btween APR generated SPEF and RCExt tool gen SPEF

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steve_mac

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Hi All,

I am an analog engineer, but being pulled in to help in a mixed-sig chip. Hoping the digital gurus here can lend me a hand.

Am wondering how much difference is there between the SPEF generated by an APR tool like First Encounter versus a true RC extraction tool like Star RCXT.

I know common sense tells me that a task specific tool would no doubt give me better extraction values, but what about the SPEF generated by APR ? Is it also good enough to do a proper STA?
 

Yes, normally the RC extraction tool can give you better extraction values, and the SPEF generated by APR tool is more and more closed to RC extraction tools.
 

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    steve_mac

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STAR RCXT generated SPEF will be more accurate compared to APR generated SPEF.

The extraction algorithm used by STAR RCXT generates better result......

This is my understanding when i did a comparison with SPEF's generated by both RCXT & APR tools.
 

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    steve_mac

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