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https://designers-guide.org/forum/YaBB.pl Measurements >> Phase Noise and Jitter Measurements >> PSS+PNoise question https://designers-guide.org/forum/YaBB.pl?num=1172740509 Message started by xuel on Mar 1st, 2007, 1:15am |
Title: PSS+PNoise question Post by xuel on Mar 1st, 2007, 1:15am I use pss+pnoise to simulate the noise of a switching circuit, in pnoise setup, choose jitter as noise type. And I get a result of 10mV integrated noise. The question is is this value rms-noise or peak-noise? |
Title: Re: PSS+PNoise question Post by Ken Kundert on Mar 1st, 2007, 6:47pm It's got to be RMS. Peak is not defined for Gaussian noise. -Ken |
Title: Re: PSS+PNoise question Post by xuel on Mar 4th, 2007, 7:49pm from the equation (19) on page 8 of "Modeling Jitter in PLL-based Frequency Synthesizers", the edge-to-edge jitter is calulated as: Jee=sqrt(var(nv(tc)) / (dv(tc)/dt) if var(nv(tc)) is rms noise, Jee should be rms jitter? I am puzzled. |
Title: Re: PSS+PNoise question Post by Ken Kundert on Mar 5th, 2007, 3:51pm Yes, Jee is RMS jitter. You might want to update you version of that paper. Eqn (19) is no longer on page 8, and the equation you give is not Eqn (19). -Ken |
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