Qes about Phase-Noise calculation

Sep 05, 2006 2 Replies
C

Hi, guys.



I got a problem when calculating the phase-noise. There're empirical parameters in Leeson's formula, so it is impossible to calculate the phase-noise with the formula.



And I found the Hjimiri's formula not include any empirical parameters. However, the ISF(Impulse sensitivity function) should be got by simulation, and I haven't found a practical way to get it. In fact, I have no idea about linear time-varient theory, so i can't understand the ISF.



If anybody learn the hajimiri's theory and ISF, help me out please.



Thanks in advance



Crystal



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M

what are you trying to calculate the phase noise of?

Mark

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C

You can simulate phase noise with SpectreRF or GoldenGate if you can afford those. Otherwise I think you're in for a lot of maths but if you figure out how to do it you can then start a software company. If you go to a library which has the IEEE Journal of Solid State Circuits, then there are a few papers in there (which it sounds like you are aware of), but not all of those seem to agree with each other which probabaly means it is difficult.

Chris

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