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How to average a transient-noise iteration family before applying ymax() in ViVA/ADE?

Tifox

Hi,

I am running a transient simulation with:

  • A parametric sweep of the ADC Vin_1 input starting voltage (6 sweep points)
  • Transient noise enabled with 10 iterations for each sweep point

I have a waveform/expression called DNL_ADC12 that contains the DNL versus time (or sample number).

When I evaluate:         ymax(DNL_ADC12)

I obtain, for each input voltage, a waveform whose X-axis is the iteration number and whose Y-axis is the maximum DNL found during that iteration.

I can then evaluate:   average(ymax(DNL_ADC12))

which gives the average of the maximum DNL values across the 10 iterations for each input voltage.

However, this is not the quantity I am looking for.

I would like to:

  1. Average the complete DNL waveform across the 10 transient-noise iterations, point-by-point.
  2. Obtain a single averaged DNL waveform for each input voltage.
  3. Apply ymax() to this averaged DNL waveform.

In other words, I want:

ymax( average_over_iterations( DNL_ADC12 ) )

and not:
average( ymax( DNL_ADC12 ) )
which appears to average the ymax over all iterations rather than average the iteration family members. I also tried some family-related functions, but could not find the correct ViVA expression.

Does anyone know the proper ViVA/ADE calculator function to average a transient-noise iteration family point-by-point before applying ymax()?

Thanks.

Thierry




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