loose-electron
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Best Design Tool = Capable Designers
Posts: 1638
San Diego California
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What I find funny about the whole jitter question is that at the end of the day the theoretical expectations tend to be totally lost in the noise (bad pun) of the environmental noise of cross coupling, power and ground rail noise and similar.
Most of the time people dont model all of the second order effects. For ring oscillators, all the second order junk tends to dominate the performance and the theoretical expctations are created from a deficient model.
GIGO - results are only as good as the model simulated.
LC VCO's tend to be closer in correlation to the model due a simpler architecture and less sources of second order problems. However, in the RF world people tend to talk "spectral spreading" for these, rather than "jitter"
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