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How to set different accuracy settings for different time periods in transient simulation.

vamshiky

Hi,

 

I have a circuit which takes some 10us for the initial transients to settle and reach a steady state.

Just wondering if can reduce the simulation accuracy to 'moderate'  during the initial times and later make it 'conservative' after reaching the steady state.


Is it doable using spectre simulator?

 

Thanks,

Vamshi

 

Parents
  • Andrew Beckett

    Hamid,

    This appears to be a bug. You must have tried "conservative" (with quotes) to get that error - that wouldn't work anyway - but without the quotes it fails too:

        ERROR (SFE-1997): "input.scs" 59: pss: parameter `param_vec': Cannot run the simulation because an unknown parameter `conservative' has been specified in expression `conservative'. Correct the expression and rerun the simulation.

    Instead, use the value 2. Since errpreset is an enumerated value, you can use 0 instead of liberal, 1 instead of moderate, and 2 instead of conservative. I've tried this and it works fine - the log file tells you it's switching to conservative.

    I'll file a CCR for this issue.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    Hamid,

    This appears to be a bug. You must have tried "conservative" (with quotes) to get that error - that wouldn't work anyway - but without the quotes it fails too:

        ERROR (SFE-1997): "input.scs" 59: pss: parameter `param_vec': Cannot run the simulation because an unknown parameter `conservative' has been specified in expression `conservative'. Correct the expression and rerun the simulation.

    Instead, use the value 2. Since errpreset is an enumerated value, you can use 0 instead of liberal, 1 instead of moderate, and 2 instead of conservative. I've tried this and it works fine - the log file tells you it's switching to conservative.

    I'll file a CCR for this issue.

    Regards,

    Andrew.

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