PSS convergence on divider

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lianggu

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Hi,

When I run PSS simulation on a divider by 2 (just a DFF with negative feedback), but it always can not be convergent even if I set large tstab and steadyratio. Can anyone tell me what I should do?
 

Now I meet the same problem.Who will give us some advice?
 

I solved this problem. The key is to set the beat frequency .
 
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