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What is Strobed Periodic Noise simulation in SpectreRF

RFStuff

 Dear All,

 In SpectreRF documents I have come across "Strobed Periodic Noise simulation in SpectreRF" for Synchronous Jitter measurement.

But in Pnoise analysis I have not seen Strobed option.

So what is Strobed Periodic Noise simulation in SpectreRF ?

Kind Regards,

Parents

  •  Dear Andrew,

    Thanks a lot for your reply.

    After reading through spectreRF(latest manual), I have following confusions:-

    1:-

    If I enter total number of timepoints let's say 4 and the PSS total timepoints=400, then tdnoise takes which timepoints ?

     

    2:- For a stand alone Oscillator relative harmonioc is set to 1, for doing pnoise analysis using Modulated, Jitter and tdnoise.

    But for driven circuit, the relative harmonic is set to 0 ( while sweeptype is kept relative) for Modulated,Jitter and tdnoise.

    This I am not able to understand. Why this differnce from Oscillator.

    What I am thinking is:- Let's say Modulated PM analysis for driven Circuit. The Phase noise is due to  fc+fm & fc-fm components.

    Where fc is the center/output  frequency ( PSS beat freq) of the  driven circuit & fm is onepoint of the sweep frequncy.

    So the output noise frequency is calculated with respect to ( relative) to fc. So relative harmonic shoould be 1 NOT 0.

    But then why relative harm=0 set in the document for driven circuit.

    Kind Regards,

     

Reply

  •  Dear Andrew,

    Thanks a lot for your reply.

    After reading through spectreRF(latest manual), I have following confusions:-

    1:-

    If I enter total number of timepoints let's say 4 and the PSS total timepoints=400, then tdnoise takes which timepoints ?

     

    2:- For a stand alone Oscillator relative harmonioc is set to 1, for doing pnoise analysis using Modulated, Jitter and tdnoise.

    But for driven circuit, the relative harmonic is set to 0 ( while sweeptype is kept relative) for Modulated,Jitter and tdnoise.

    This I am not able to understand. Why this differnce from Oscillator.

    What I am thinking is:- Let's say Modulated PM analysis for driven Circuit. The Phase noise is due to  fc+fm & fc-fm components.

    Where fc is the center/output  frequency ( PSS beat freq) of the  driven circuit & fm is onepoint of the sweep frequncy.

    So the output noise frequency is calculated with respect to ( relative) to fc. So relative harmonic shoould be 1 NOT 0.

    But then why relative harm=0 set in the document for driven circuit.

    Kind Regards,

     

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