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Harmonic Parametric

AMSboston

Hi,

Below is a SKILL  to find the Harmonic Frequency distortion level.

If I run a single simulation I get the correct answer.

 However, if I run a Parametric Sweep of VAR("fin") I get the following error:

*Error* round: argument #1 should be a number (type template = "n") - drwave:213939744.

 I get the error because "FreqN" is a vector.

How do I modify the script below such that it can handle a Parametric Sweep?

BTW, if freqN was a list or a vector I could make the code work with a foreach command.

However, freqN is not a list, nor is it a vector.

What is it?

####################################################################### 

procedure( CCSharmonicDistNEW( tranwave dftFrom dftTo numSample freqN freq0)
     let( (res dftwave newFreqN)
     dftwave = dft(tranwave,dftFrom ,dftTo,numSample,"Rectangular",1,1)
newFreqN=abs(round(freqN/250e6)*250e6-freqN)
     res = db20( mag(value(dftwave newFreqN))/mag(value(dftwave freq0)))
     res
)
)

 ocnPrint(CCSharmonicDistNEW(VT("/XQDCA/RECONSTRUCTED") 42.2n 298.2n 64 3*VAR("fin") VAR("fin")))
############################################################################################

Parents

  • Note I have not tested this, but this is the approach normally taken:

    procedure( CCSharmonicDistNEW( tranwave dftFrom dftTo numSample freqN freq0)
  cond(
   ; handle ordinary waveforms
   (drIsWaveform(tranwave)
     let( (res dftwave newFreqN)
       dftwave = dft(tranwave,dftFrom ,dftTo,numSample,"Rectangular",1,1)
       newFreqN=abs(round(freqN/250e6)*250e6-freqN)
       res = db20( mag(value(dftwave newFreqN))/mag(value(dftwave freq0)))
       res
     )
   )
   ; and family waveforms
   (famIsFamily(tranwave)
     famMap('CCSharmonicDistNEW tranwave dftFrom dftTo numSample freqN freq0)
   )
   ; oh dear, help!
   (t
     error("CCSharmonicDistNEW - can't handle %L\n" tranwave)
   )
  )
)

    The idea is that you use famMap to iterate over the family members (recursively) - hence the cond() to determine if the waveform is a family. As each family member is visited by famMap, it will call the function with the inner level, and do the same thing again, until it reaches a conventional waveform. Then as the famMap returns, it will collect all the results into families, and so on.

    There are a few examples of using this on Cadence Online Support.

    Regards,

    Andrew.

Reply

  • Note I have not tested this, but this is the approach normally taken:

    procedure( CCSharmonicDistNEW( tranwave dftFrom dftTo numSample freqN freq0)
  cond(
   ; handle ordinary waveforms
   (drIsWaveform(tranwave)
     let( (res dftwave newFreqN)
       dftwave = dft(tranwave,dftFrom ,dftTo,numSample,"Rectangular",1,1)
       newFreqN=abs(round(freqN/250e6)*250e6-freqN)
       res = db20( mag(value(dftwave newFreqN))/mag(value(dftwave freq0)))
       res
     )
   )
   ; and family waveforms
   (famIsFamily(tranwave)
     famMap('CCSharmonicDistNEW tranwave dftFrom dftTo numSample freqN freq0)
   )
   ; oh dear, help!
   (t
     error("CCSharmonicDistNEW - can't handle %L\n" tranwave)
   )
  )
)

    The idea is that you use famMap to iterate over the family members (recursively) - hence the cond() to determine if the waveform is a family. As each family member is visited by famMap, it will call the function with the inner level, and do the same thing again, until it reaches a conventional waveform. Then as the famMap returns, it will collect all the results into families, and so on.

    There are a few examples of using this on Cadence Online Support.

    Regards,

    Andrew.

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