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Measurements >> Phase Noise and Jitter Measurements >> how to set the vale of output frequency sweep range in pnoise simulation
https://designers-guide.org/forum/YaBB.pl?num=1257245734

Message started by bsaqycx on Nov 3^rd, 2009, 2:55am

Title: how to set the vale of output frequency sweep range in pnoise simulation
Post by bsaqycx on Nov 3^rd, 2009, 2:55am

Dear all:
I'd like to simulate the jitter of clock slicer ( used to adjust the duty cycle of clock ). When I do the pnoise simulation, I've no idea how to set the vale of output frequency sweep range. When I set the " stop" value to be 2 times clock frequency ( 8MHz) , the outcome seems reasonable ( 5ps ). But when I set the " stop" value to be 1GHz, the jitter turns to be 6us. I've no idea how to choose output frequency sweep range correctly.
What's more, when I open " Main Form" I find an option called "tdnoise". What's the meaning of this result?
Thank you in advance!

Title: Re: how to set the vale of output frequency sweep range in pnoise simulation
Post by Frank Wiedmann on Nov 3^rd, 2009, 5:32am

See http://www.designers-guide.org/Forum/YaBB.pl?num=1224609785 and the links given there (http://www.designers-guide.org/Forum/YaBB.pl?num=1092399689/20#20 for the frequency range in tdnoise or jitter analysis).

Title: Re: how to set the vale of output frequency sweep range in pnoise simulation
Post by bsaqycx on Nov 3^rd, 2009, 7:27pm

Thank you very much for your help!

Title: Re: how to set the vale of output frequency sweep range in pnoise simulation
Post by bsaqycx on Nov 10^th, 2009, 10:46pm

the frequency of input clock is 4MHz, how should I choose the Stop frequency to get the proper cycle-to-cycle jitter? The results change a lot if the Stop frequency is chose different!

Title: Re: how to set the vale of output frequency sweep range in pnoise simulation
Post by Haward Zhu on Sep 19^th, 2010, 11:46pm

the same question confused me too