I checked "pnoise" or "hbnoise" --> "options" --> convergence parameters, but could not find the option.
Please let me know where I can find it.
I have a mmsim version of 7.1.0.060.
I suspect you're not using a new enough version of the IC tools. Which IC subversion are you using?
That said, I don't see augmented as an option on hbnoise in IC5141, although it is supported now.
The workaround in either case is to type "augmented=yes" in the additional parameters field at the bottom of the form.
Yes, I am using IC5141. I think that is the reason. Thanks Andrew.
I simulated with "augmented=yes" as you suggested , however I still got phase noise above 0dBC/Hz below lindwidth frequency. Shoud not it be a Lorentzian plot?
You will still see phase noise above 0dBc/Hz for shooting pss/pnoise with augmented = yes. This is non-physical and can be ignored.
In the new hb/hbnoise analysis in MMSIM7.1, you will not see the phase noise above 0dBc/Hz for augmented=yes. There have been recent enhancements, so you may want to download the latest MMSIM7.1 ISR5 (available) or ISR6 (when it is available later this week or next week).
I have a further question though. Since the augmented hbnoise/pnoise gives a flat spectrum close to carrier, I would guess the flicker noise is modeled with certain bandwidh,below which the noise spectrum gets flat. Am I right?
If that is true, how is this flicker noise bandwidth defined?