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Problem in taking derivative in calculator

BaaB

I have a common source amplifier and I run DC analysis with Vgs swept. Then I plot Vds and Ids vs Vgs.
Next from the ViVA I choose Y vs Y to plot Vds vs Ids.
Until now everything is OK. However, now I want to plot dVds/dIds (d is derivative here).
I sent the line Vds vs Ids to the calculator but it doesn't work. The calculator shows nothing.
Could you help me with this?

Parents

  • Use the waveVsWave function in the calculator. Send the two waveforms that you want to plot versus each other to the calculator, and then on the waveVsWave form you can pick which you want as the x-axis and which you want as the y-axis. Then you can apply deriv to the result of this.

    Note that the function only appears in the functions panel from IC616 ISR12 (6.1.6.500.12) onwards. However, the function itself exists in all IC616 versions so you can just type it in:

    deriv(waveVsWave(?x getData("m1:ids" ?result "dc") ?y v("vds" ?result "dc")))

    Obviously adapt your ?x and ?y arguments as appropriate for your signals.

    Regards,

    Andrew.

Reply

  • Use the waveVsWave function in the calculator. Send the two waveforms that you want to plot versus each other to the calculator, and then on the waveVsWave form you can pick which you want as the x-axis and which you want as the y-axis. Then you can apply deriv to the result of this.

    Note that the function only appears in the functions panel from IC616 ISR12 (6.1.6.500.12) onwards. However, the function itself exists in all IC616 versions so you can just type it in:

    deriv(waveVsWave(?x getData("m1:ids" ?result "dc") ?y v("vds" ?result "dc")))

    Obviously adapt your ?x and ?y arguments as appropriate for your signals.

    Regards,

    Andrew.

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