Stats

  • Locked Locked
  • Replies 6
  • Subscribers 63
  • Views 16929
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Cannot get the Lorentzian plot in Pnoise simulation

ycyang

Hi,

I am trying to run the PSS+Pnoise to get the linewidth of the VCO.
I have set the Pnoise option "augmented=yes" for PSS+Pnoise oscillator simulations.
Nevertheless, I cannot get the Lorentzian plot, the phase noise still goes up and becomes larger than 0 dBc at low frequencies.
The logfile says:"Compute Floquet mode for autonomous ciruits... ...".
It seems the simulator does not use frequency-aware PPV method.

Is there anything wrong in my setting?
By the way, the MMSIM version I use is 7.2ISR7

Thanks

Parents
  • ycyang

    Hi Andrew

    I found I used wrong version of MMSIM after reading your reply. After switching to a later version, the warning message disappeared.
    As for the problem that I could not get the Loretzain plot in the beginning, I am sure that the option "augmented" was set to yes. I don't know why the Lorentzain didn't show. I will discuss this with our CAD engineer.
    Thank you very much for you assistance.

    Regards,

    ycyang

Reply
  • ycyang

    Hi Andrew

    I found I used wrong version of MMSIM after reading your reply. After switching to a later version, the warning message disappeared.
    As for the problem that I could not get the Loretzain plot in the beginning, I am sure that the option "augmented" was set to yes. I don't know why the Lorentzain didn't show. I will discuss this with our CAD engineer.
    Thank you very much for you assistance.

    Regards,

    ycyang

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.