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Is it possible to print noisesummary for input referred noise in Spectre?

ayayla

Hi,

I am running AC noise simulation and looking at the output and input referred noise in Spectre. I can look at the output noise summary either with print noise summary or noisesummary() function in Ocean as well as the total input-referred noise.

My question, is there a way to look at the noise summary for the input-referred case? Total Input-referred noise is calculated by dividing output noise to gain but for noise summary, it is more tricky since we need to find transfer function from the noise source to input instead of output.

Thanks

yayla

  • Andrew Beckett

    Yayla,

    Given that all the noise contributors are actually reported as output-referred noise contributors (the primary outputs of all noise analyses are output-referred total noise and output-referred noise contributors), you'd just need to divide them by the gain from input to output (or the gain squared, if the units are V^2/Hz). The noise summary doesn't give the ability to do this - but you could produce the data yourself should you want to (it's all there in the noise result database).

    Of course the percentage contributions will be identical whether you look at them input-referred or output-referred, so I'm not quite sure how useful it is to input-refer all the contributors.

    Andrew.

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