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Problems with parametric analysis in pspice

madhuraj

Hi,

I was trying to do a parametric analysis with AC Sweep. I was sweeping a particular resistance value from 400 ohms to 1100 ohms in steps. Actually the bode plot (DB and phase) at some particular point in the circuit should  show a sharp turnaround at around 520 ohms. This was proved when I was changing the values manually and performing the AC sweep. But when I performed a parametric sweep this change was not seen , the curves were following same trend as in case of 400 ohms but with some minor offset in each case, but in actual case if you look at the curves when it is at 1100 ohms and when it is at 400 ohms there should be a huge differenece. I am not sure why this is happening. Has anyone faced similar problem ? please help me

One more point is if I want to sweep to different parameters at a time, is there any other way other than using IF statement,

Best regards

Madhuraj 

 

  • FormerMember
    FormerMember

    I am seeing a similar problem. In my case, I have a transient analysis and parametric sweep of a Global parameter with 2 steps. The first step consistently simulates to completion (1 mS), while the second step consistently fails to converge very early in the transient simulation (20 nS to 2 uS). The really odd thing is that if I swap the order of the steps, the first (which was previously the second) simulates to completion while the second (previously the first) fails to converge. And if I eliminate the sweep and set the global parameter manually, each of the 2 steps simulation to completion. 

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