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Sweep errors

HamidKhatibi

Hi

In out lab whenever we use Sweep in Cadence Virtuoso the result we get is TOTALLY different compared to the case that we simulate point by point.

It has happened to all of us, both with transient and PSS simulations such that we do not use Sweeping tool anymore! Therefore we cannot find an optimum point with the help of sweeping.

Does anyone know anything about this issue?

Our MMSIM version is 11 so it is old, but has this been a problem with old versions?

Best

Hamid

Parents

  • Hi Andrew

    Thank you very much for your detailed response.

    To give an example, I have a very simple amplifier and I want to sweep the input power in order to find maximum PAE and to see how gain evolves as input power increases. As you mentioned I use Tools->Parametric Sweep. The results are not consistence with when I do them point by point myself.

    The other circuit was an oscillator where I wanted to sweep the load resistance to find the maximum output power and again sweeping and doing point by point gave me different results.

    I will try to apply what you mentioned above to see if it helps in my case or not.

    Thank you very much,

    Hamid

Reply

  • Hi Andrew

    Thank you very much for your detailed response.

    To give an example, I have a very simple amplifier and I want to sweep the input power in order to find maximum PAE and to see how gain evolves as input power increases. As you mentioned I use Tools->Parametric Sweep. The results are not consistence with when I do them point by point myself.

    The other circuit was an oscillator where I wanted to sweep the load resistance to find the maximum output power and again sweeping and doing point by point gave me different results.

    I will try to apply what you mentioned above to see if it helps in my case or not.

    Thank you very much,

    Hamid

Children
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