[time-nuts] Phase Noise Modeling in SPICE

Attila Kinali attila at kinali.ch
Fri Oct 27 18:33:54 UTC 2017

Hi Eric,

On Sun, 22 Oct 2017 14:03:02 -0700
Eric Drucker <drucker at sonic.net> wrote:

> I have done a lot of phase noise modeling using LT SPICE over the years for
> PLL’s. It will not model the phase noise of the individual devices like
> VCO’s, dividers, phase detectors. You can input the phase noise profiles of
> the various devices and it will give the output phase noise of the loop using
> AC analysis. If you want to model the phase noise of a VCO at the transistor
> level, you need a harmonic balance program that supports VCO noise modeling.
> It is very difficult to module the phase noise of dividers, at the transistor
> level but it can be done. I did a presentation a few years ago at the
> European Microwave Conference on using CAE to model phase noise in PLL’s.   
> https://www.slideshare.net/edrucker1/european-microwave-pll-class

Is your presentation available as pdf or ppt? (to store for future reference)
Also, do you have any recomendations what to read to learn how to do
such simulations properly?

			Attila Kinali
It is upon moral qualities that a society is ultimately founded. All 
the prosperity and technological sophistication in the world is of no 
use without that foundation.
                 -- Miss Matheson, The Diamond Age, Neil Stephenson

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