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What is the use of No of harmonics option in PSS form

RFQuery

 Hi,

In PSS form, there is one option called Number of harmonics. I am NOT able to understand what is its use as PSS is any way a Steady state DC operating point analysis ?

Of course, No of harmonics actually controls the time step for better accuracy (like to avoid Aliasing effect etc). But the time step can easily controlled by maxacfreq OPTION.

 So my doubt is:- Whether the Harmonic Option in PSS form is needed for Some other reasons ?

IS there any documents which actually explains the need/use (OTHER than controlling Time Step) of No. of Harmonics option in PSS form

Thanks

 

Parents

  • maxacfreq affects the number of time points in the PSS solution - and defaults to max(maxharms,10)*4*PSSfund. 

    The number of time points in the tdnoise analysis won't affect accuracy - it simply controls which time points you produce a time-domain (strobed) noise output at. Each time in tdnoise is a separate pnoise simulation with an ideal strobe at that time point - so the results should be separate from each other.

    I'm not sure what you are saying about "the range for tdnoise integration is somewhat overestimated...". It's probably best if you contact customer support so that we can get a more detailed understanding of precisely what you're doing and hoping to achieve, and can help you understand the right settings.

    The SpectreRF Theory should cover it (certainly recent MMSIM versions) - but if not, we need to understand what's not clear so that we can see what else needs to be added to the documentation to make it clearer.

    Kind Regards,

    Andrew.

Reply

  • maxacfreq affects the number of time points in the PSS solution - and defaults to max(maxharms,10)*4*PSSfund. 

    The number of time points in the tdnoise analysis won't affect accuracy - it simply controls which time points you produce a time-domain (strobed) noise output at. Each time in tdnoise is a separate pnoise simulation with an ideal strobe at that time point - so the results should be separate from each other.

    I'm not sure what you are saying about "the range for tdnoise integration is somewhat overestimated...". It's probably best if you contact customer support so that we can get a more detailed understanding of precisely what you're doing and hoping to achieve, and can help you understand the right settings.

    The SpectreRF Theory should cover it (certainly recent MMSIM versions) - but if not, we need to understand what's not clear so that we can see what else needs to be added to the documentation to make it clearer.

    Kind Regards,

    Andrew.

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