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spectre MDL - changing values of x-axis

slim15

I am running a transient simulation and would like to use Spectre MDL to calculate the fft of a signal. For correct processing, I need to change the value of the x-axis of the signal and in normal ADE or ADEXL simulation, I used to fix it using drPutWaveformXVec. Is there similar comment for SpectreMDL?

Regards,

Su Lim

  • I don't really understand what this would mean in MDL. What does your MDL script look like?

    Regards,

    Andrew.

  • in reply to Andrew Beckett

    Hi andrew,

    Within my MDL script, I have spectre perform a transient simulation. After which I have this statement

      real out_wave[] = sample(sig=V(reference), from = 1.33e-7, to=7.36e-7, by=6.7e-8, type='linear)

    if I were to do xval(out_wave[]) I would have 1.33e7, 2.00e7, 2.67e-7 and etc. Is it possible to change the modify the x-y pair of out_wave such that xval(out_wave[0:3] is now 0, 1e-6, and 2e-6?

    I would like to do this change before I execute the dft function like dft(sig=out_wave, from=0, to=9, numPoints=32, window="Rectngular") that is further down in my MDL script. 

    Regards,

    Su Lim

    am executing a transient simulation. After 

  • in reply to slim15

    I'm pretty certain this can't be done. Not quite sure what the benefit would be - you could achieve the same by altering the arguments to the fft function...

    Regards,

    Andrew.

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