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 where to set "augumented" option in pnoise or hbnoise 

Last post Thu, May 14 2009 12:40 PM by RFMEMS. 4 replies.
Started by RFMEMS 12 May 2009 08:40 AM. Topic has 4 replies.
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  • Tue, May 12 2009 8:40 AM

    • RFMEMS
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    • Joined on Wed, Apr 1 2009
    • Zurich, Zurich
    • Posts 5
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    where to set "augumented" option in pnoise or hbnoise Reply

    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.

    • Post Points: 20

  • Tue, May 12 2009 10:23 AM

    Re: where to set "augumented" option in pnoise or hbnoise Reply

    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.

    Regards,

    Andrew.

    • Post Points: 20

  • Tue, May 12 2009 1:53 PM

    • RFMEMS
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    Re: where to set "augumented" option in pnoise or hbnoise Reply

    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?

     
    • Post Points: 20

  • Tue, May 12 2009 3:04 PM

    • Tawna
    • Top 50 Contributor
    • Joined on Thu, Jul 10 2008
    • Snohomish, WA
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    Re: where to set "augumented" option in pnoise or hbnoise Reply

    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).  

     

    Best regards,

    Tawna Wilsey 

    Best regards, Tawna Wilsey Staff Support AE, Global Customer Support Cadence Design Systems, Inc.
    • Post Points: 20

  • Thu, May 14 2009 12:40 PM

    • RFMEMS
    • Not Ranked
    • Joined on Wed, Apr 1 2009
    • Zurich, Zurich
    • Posts 5
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    Re: where to set "augumented" option in pnoise or hbnoise Reply

     Thanks 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? 

     

    • Post Points: 5
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Started by RFMEMS at 12 May 2009 08:40 AM. Topic has 4 replies.