The Designer's Guide Community
Forum
Welcome, Guest. Please Login or Register. Please follow the Forum guidelines.
Oct 4th, 2024, 4:14pm
Pages: 1
Send Topic Print
Is there a way to get pnoise with sub-sampled jitter (Read 963 times)
iVenky
Senior Member
****
Offline



Posts: 101
Silicon Valley
Is there a way to get pnoise with sub-sampled jitter
May 05th, 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?
Back to top
 
 
View Profile   IP Logged
Andrew Beckett
Senior Fellow
******
Offline

Life, don't talk to
me about Life...

Posts: 1742
Bracknell, UK
Re: Is there a way to get pnoise with sub-sampled jitter
Reply #1 - May 12th, 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
Back to top
 
 
View Profile WWW   IP Logged
Pages: 1
Send Topic Print
Copyright 2002-2024 Designer’s Guide Consulting, Inc. Designer’s Guide® is a registered trademark of Designer’s Guide Consulting, Inc. All rights reserved. Send comments or questions to editor@designers-guide.org. Consider submitting a paper or model.