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Using S-parameter within Allegro CIS?

bmak08

Hi,

I am trying to create a symbol that references an S-parameter file for a simulation. Is it possible to use Allegro CIS and PSPICE AD to run a simulation that requires s-parameters?

Thanks!

  • bmak08
    0 in reply to excellon1

    Hi, thanks for the app note.

    To be clear, I am not trying to create / define S-parameters of a model. I have an existing S-parameter model that is defined and would like to run a simulation in PSPICE AD. Is there any way to simulate this?

    Thanks!

  • excellon1
    0 in reply to bmak08

    Hi,

    The S-Parameter data you have is just the result of a simulation of reflection measurements for a device. For passive devices this would be impedance data vs frequency, Mag Phase etc. For active devices such as a transistor etc this would be the measured impedance data at a fixed bias point.

    It would be possible to do what you are after to some degree but in p-spice you would need to create a sub-circuit for analysis and pull the manufacturers SP2 data into that. "Not easy to do"

    Here is an older app note that goes into that.
    https://designers-guide.org/forum/Attachments/CreateS-ParameterSUBCKTinPSpice.pdf

    A far better way do analysis on SP2 data you would be to use a dedicated RF simulator such as ADS or AWR.

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