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Error evaluating ocean expresstion

winever

Hi everybody,

I got the following error when doing Monte Carlo analysis.

Error evaluating ocean expresstion bw = bandwidth(VF("/VOUTP") 3 "low")

It seems that the error is always there whether the analysis is done using ADE or OCEAN. For all the iterations, some can got the expected results while the others return the above error. However, I get the above expression from the Cadence Tool Calculator. I tried it several times, but the error was still there. Now, I was confused. Could anyone tell me what goes wrong? I appreciate it for your help.

 

Regards,

Winever.   

Parents
  • meland

     Winever,

     Have you tried running your ADE under the conditions in which it is failing? It could be that it is failing because the monte carlo essentially pushes it to a point where the circuit fails to generate something with a bandwidth and therefore has an error calculating because it doesn't exist. Similar to it would error if you ask for a rise time when there is no rise tranistion.

     So it could correctly be generating an error. I would check my waveforms

    -Matt

Reply
  • meland

     Winever,

     Have you tried running your ADE under the conditions in which it is failing? It could be that it is failing because the monte carlo essentially pushes it to a point where the circuit fails to generate something with a bandwidth and therefore has an error calculating because it doesn't exist. Similar to it would error if you ask for a rise time when there is no rise tranistion.

     So it could correctly be generating an error. I would check my waveforms

    -Matt

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