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Measurements >> Phase Noise and Jitter Measurements >> Question: Translation from psd to jitter
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Message started by tumeda on Jan 10^th, 2006, 10:25am

Title: Question: Translation from psd to jitter
Post by tumeda on Jan 10^th, 2006, 10:25am

Question is in following:

In the Eqn.56 of Ken's paper(noise and jitter)

var(n)=∫₀^∞S_n(f)df

However, in the paper "Jitter and Phase Noise in Ring
Oscillator" of Hajimiri in 1999, the jitter is calculated by

σ_ΔT²=∫₀^∞S_Φ(f)sin²(πfΔT)df

if the ΔT→∞ then

σ_ΔT²=2/(ω₀²) ∫₀^∞S_Φ(f)df
Who can help me to understand, why the two transformations are different,
and how to explain it? Thanks a lot in advance!

Title: Re: Question: Translation from psd to jitter
Post by greatqs on Nov 9^th, 2006, 5:13am

first of all, they are different kind of jitter.
one is phase jitter or absolute jitter.
the other is so-called self referenced- jitter in interval T.

To find out extact definition for these. Check out papers by McNeil and Demir on jitter