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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.
In reply to Andrew Beckett:
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?
In reply to RFMEMS:
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).
Customer Support Director - Analog/Mixed-Signal/RF AEs
Cadence Design Systems, Inc.
In reply to Tawna:
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?