Stats

  • Locked Locked
  • Replies 3
  • Subscribers 63
  • Views 1710
  • 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

Issue with Flicker phase noise simulaiton with PSS+Pnoise in cadence

lraf

I have a problem with Flicker phase noise of a quartz crystal oscillator (RLC equivalent cirucit + opamp current amplifier + opamp inverter) simulated with PSS + Pnoise of CADENCE:

Indeed I simulate the phase noise of a quartz crystal oscillator and I include only Flicker noise (verilogA) in the feedback opamp inverter. The simulated phase noise shows white phase noise, f-2 phase noise and f-3 phase noise near the carrier, instead of only f-1 phase noise and f-3 phase noise!

Can you please help me solve this problem?

Best regards

Raphael

  • It would help to see your veriloga model and the input.scs that you are simulating. Much easier than trying to guess what you've done.

    Thanks,
    Andrew

  •  Dear andrew,

    Thank you for your prompt answer!

    Please find attached to this post:

    the input.scs file, the verilogA model of noise, and the simulations results: transient, noise, PSS, Pnoise and noise summary for phase noise.

    The Phase noise and its associated noise summary show that there is only Flicker noise contribution to phase noise but there is still 0 slope phase noise and 1/f2 slope phase noise whereas there should be only 1/f slope and 1/f3 slope phase noise !

    I hope you have enough informations..

    Thanks

    Raphael

     SCHEMATIC:

     

     

     

     

  •  still no answer....... snifff.....

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.