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https://designers-guide.org/forum/YaBB.pl Measurements >> Phase Noise and Jitter Measurements >> Matching period jitter given in guide https://designers-guide.org/forum/YaBB.pl?num=1673629408 Message started by cmosbike on Jan 13th, 2023, 9:03am |
Title: Matching period jitter given in guide Post by cmosbike on Jan 13th, 2023, 9:03am Hello, I read the guide Modeling Jitter in PLL-based Frequency Synthesizers by Ken Kundert. I am trying to match the jitter reported in this guide (9.8ps), but the output of the matlab script is giving 11.1 ps jitter. I also hard-coded the tt values but this didn't seem to help either. I have copied Listing 6 - 8 and placed into Virtuoso running spectre and checked the parameters given in the netlist. Attached is my netlist from Spectre. Code:
In Matlab, I am using the periods.m file and using the mapping to VCO jitter by dividing by sqrt(N). Code:
Did I miss something? It would give me more confidence if my result matched the guide before modifying further. |
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