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Does Spectre (Currnetly : Version 13.1.0.127.ISR3) has any option or setup to get better SFDR ?

Charley Chen

Hi All , 

 

If lumped C , SFDR is OK , once  has r  and only r (no c/cc) ,  (SFDR ↑  r count  ↓     ,   SFDR ↓  r count  ↑ )

Does Spectre(Currnetly : Version 13.1.0.127.ISR3)  has any option or setup to get better  SFDR ?

I found when i reduct the r netwok , SFDR is better (r count is less) , if not reduct r network , SFDR  is worst (r count 14699)

How to  solve it ?

 

Thank you,

Charley 

 

 

Parents

  • Hi Andrew , 

     

    Sorry ,  I am debuging PostSim result  and spend a long time , since designer's pre-sim SFDR is better , but after extract r PostSim ,

    the SFDR is worst ,  The  trend (SFDR ↑  r count  ↓     ,   SFDR ↓  r count  ↑ )  is base on parasitic r network (r  count).

    Does spectre has limition on r count in parasitic file ? It means in  "conservative moderate liberal" is dependent  on

    r count  in parasitic file? 

     

    Thank you,

    Charley 

Reply

  • Hi Andrew , 

     

    Sorry ,  I am debuging PostSim result  and spend a long time , since designer's pre-sim SFDR is better , but after extract r PostSim ,

    the SFDR is worst ,  The  trend (SFDR ↑  r count  ↓     ,   SFDR ↓  r count  ↑ )  is base on parasitic r network (r  count).

    Does spectre has limition on r count in parasitic file ? It means in  "conservative moderate liberal" is dependent  on

    r count  in parasitic file? 

     

    Thank you,

    Charley 

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