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Simulators >> RF Simulators >> Is there a way to get pnoise with sub-sampled jitter
https://designers-guide.org/forum/YaBB.pl?num=1588746927

Message started by iVenky on May 5^th, 2020, 11:35pm

Title: Is there a way to get pnoise with sub-sampled jitter
Post by iVenky on May 5^th, 2020, 11:35pm

I have a fclk signal, and I simulated the pnoise based on threshold crossings (Edge phase noise in Spectre RF).
I want to see the effect of foldback after an ideal divider (divide by 2). In order to do that, instead of having a divider in the bench, I was thinking if I could just sub-sample the sampled jitter that was obtained based on threshold crossings and then plot the pnoise for that sub-sampled jitter (that would correspond to a fclk/2 clk). Is there a way to do that in Spectre RF?

Title: Re: Is there a way to get pnoise with sub-sampled jitter
Post by Andrew Beckett on May 12^th, 2020, 12:09am

You could just set the PSS fundamental to fclk/2 - then the sampler in the sampled pnoise analysis will be operating at fclk/2 (assuming I've understood what you're asking).

Andrew