Stats

  • Locked Locked
  • Replies 2
  • Subscribers 124
  • Views 13920
  • 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

RE: transient simulation accuracy

Kifah

Hi Andrew

I'm using transient simulation to draw the output wave forms of different LNAs, I know that Accurcy Defaults ( consevative, moderate and liberal ) manage the resolution of the wave form, but my question is how I can manage the number of sampels per period.

for example:

for frequency 1G Hz, I need to see wave form with 1000 samples per 1n sec.

Sincerely,

Kifah 

Parents
  • Andrew Beckett

    Hi Kifah,

    This didn't appear to be that related to the thread which you'd appended to (the Forum Guidelines ask you not to post on the end of old threads) so I split it into a new one.

    First thing I should say is that just because a waveform doesn't have a certain number of points in the period or doesn't appear smooth doesn't mean it's not accurate - what you are getting is the points that were simulated - the waveform tool just joins those points (so it's the points that are accurate, not the lines).

    However, if you want to force a certain number of samples (for some post-processing reason, such as performing a DFT/FFT) then you could set the strobeperiod option on the transient options form. If you set this to 1p (1ps) then it will ensure that the output database is generated at 1ps intervals. Note that the simulator will actually solve at these points (plus any others it needs to) so the results are not interpolated if you do this.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    Hi Kifah,

    This didn't appear to be that related to the thread which you'd appended to (the Forum Guidelines ask you not to post on the end of old threads) so I split it into a new one.

    First thing I should say is that just because a waveform doesn't have a certain number of points in the period or doesn't appear smooth doesn't mean it's not accurate - what you are getting is the points that were simulated - the waveform tool just joins those points (so it's the points that are accurate, not the lines).

    However, if you want to force a certain number of samples (for some post-processing reason, such as performing a DFT/FFT) then you could set the strobeperiod option on the transient options form. If you set this to 1p (1ps) then it will ensure that the output database is generated at 1ps intervals. Note that the simulator will actually solve at these points (plus any others it needs to) so the results are not interpolated if you do this.

    Regards,

    Andrew.

Children
  • Kifah
    in reply to Andrew Beckett

    I tried it and its worked.

    Thanks alot,

    Best regards,

    Kifah

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.