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Regarding PNOISE results obtained from Spectre-RF

sarfraz

Hi,
What sort of spectral density is obtained when we do Pnoise analysis in Spectre-RF.
Is it power spectral density of phase or is it power spectral density of voltage?

Best Regards
Sarfraz

Parents

  • If you look at the PM output it's DSB (because it is using both sidebands to compute the AM and PM components), if you look at either the USB or LSB output it's SSB. At least that's what I think it should be - checking such an old version is hard (and makes little sense for me to check).

    Note that spectre 6.1 is pretty old - I would strongly advise against using a version of the simulator that is probably 7 years or so old - I can't quite remember the date ranges for MMSIM61. SSince then we've had 6.2, 7.0, 7.1, 7.2, 10.1, 11.1 and 12.1 (so 7 major new versions of the simulator).

    Regards,

    Andrew.

Reply

  • If you look at the PM output it's DSB (because it is using both sidebands to compute the AM and PM components), if you look at either the USB or LSB output it's SSB. At least that's what I think it should be - checking such an old version is hard (and makes little sense for me to check).

    Note that spectre 6.1 is pretty old - I would strongly advise against using a version of the simulator that is probably 7 years or so old - I can't quite remember the date ranges for MMSIM61. SSince then we've had 6.2, 7.0, 7.1, 7.2, 10.1, 11.1 and 12.1 (so 7 major new versions of the simulator).

    Regards,

    Andrew.

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