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Large Signal Y-Parameter or S-parameter

HamidKhatibi

Hi

I need to find large signal Y-parameters of a 2-port network such as a common source amplifier, in  Cadence.

Has anyone done something successful in this regard, please help me with it. Once I tried LSSP but the results did not make sense and the oscillator I designed based on small signal parameters worksd, whereas the one designed based on the LSSP results did not even oscillate!

Thanks,

Hamid

Parents

  • Hamid,

    By the way, we've been discussing the validity of the zpm or ypm results when converted from large signal s-parameters. We don't think it's valid to do the same matrix manipulation for large-signal s-parameters as is done for small-signal s-parameters, and so the results may not be correct for a non-linear circuit. We probably need to do the calculations directly within the simulator.

    So there probably is a good reason for not exposing the Z and Y parameters on the LSSP direct plot form or in the calculator.

    Regards,

    Andrew.

Reply

  • Hamid,

    By the way, we've been discussing the validity of the zpm or ypm results when converted from large signal s-parameters. We don't think it's valid to do the same matrix manipulation for large-signal s-parameters as is done for small-signal s-parameters, and so the results may not be correct for a non-linear circuit. We probably need to do the calculations directly within the simulator.

    So there probably is a good reason for not exposing the Z and Y parameters on the LSSP direct plot form or in the calculator.

    Regards,

    Andrew.

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