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Use the spectre relay component

dineshp

Hi,

analogLib has a cell called "switch" which has 5 parameters, open voltage, closed voltage, open switch resistance, close switch resistance and multiplier. the documentation says that the spectre element used is "relay" and spectre -h relay gives more parameters, including hysteresis. Can somebody please tell me how to use these and set these parameters in the symbol available in analogLib? If this is not possible, alternately can somebody please explain how I can define a symbol and specify the spectre element in a model file with all the parameters I want?

Many thanks.

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  • Andrew Beckett

    The extra parameters (hysteresis, vth, trans, etc) are all model parameters and so can't be specified on the instance directly.

    The way to handle this would be to copy the component from analogLib into your own library, and the use Tools->CDF->Edit CDF in the CIW, select "Base CDF" as the type to edit, pick your copy of the component and add a new parameter "model" with Parse as Number set to "No" and Parse As CEL set to "Yes" (that's not too important probably); you can put "model" in the Other Parameters in the Spectre Simulation Information tab (again, not essential unless you've set the Display Condition callback on the model parameter to artParameterInToolDisplay('model) (this is only worth worrying about if you want to use the switch component for other simulators, maybe).

    Then when  you instantiate the switch you can specify the model name (e.g. myrelay) and then you can create a file, called myrelay.scs with:

    model myrelay relay hysteresis=0.1 ropen=100G rclosed=0.1 // whichever parameters you want

    Then reference this file via Setup->Model Libraries in ADE.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    The extra parameters (hysteresis, vth, trans, etc) are all model parameters and so can't be specified on the instance directly.

    The way to handle this would be to copy the component from analogLib into your own library, and the use Tools->CDF->Edit CDF in the CIW, select "Base CDF" as the type to edit, pick your copy of the component and add a new parameter "model" with Parse as Number set to "No" and Parse As CEL set to "Yes" (that's not too important probably); you can put "model" in the Other Parameters in the Spectre Simulation Information tab (again, not essential unless you've set the Display Condition callback on the model parameter to artParameterInToolDisplay('model) (this is only worth worrying about if you want to use the switch component for other simulators, maybe).

    Then when  you instantiate the switch you can specify the model name (e.g. myrelay) and then you can create a file, called myrelay.scs with:

    model myrelay relay hysteresis=0.1 ropen=100G rclosed=0.1 // whichever parameters you want

    Then reference this file via Setup->Model Libraries in ADE.

    Regards,

    Andrew.

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