The Designer's Guide Community
Models in Minutes
Welcome, Guest. Please Login or Register. Please follow the Forum guidelines. Feb 18th, 2019, 12:38am
  HomeHelpSearchLoginRegisterPM to admin  
Pages: 1
Send Topic Print
Spectre  .pnoise type sources vs pmjitter (Read 461 times)
Community Member

Posts: 83

Spectre  .pnoise type sources vs pmjitter
Feb 01st, 2018, 4:45am
Hi All,
In the buffer circuit, I want to analyse the phase noise due to device noise. There are two methods of doing it as discussed.
     1) Noisetype as sources: In this case, the signal “out” is clipped using an ideal VCVS to remove AM noise. In pnoise, noisetype as sources is run on “out_clip”.
     2) Noisetype as pmjitter: One can also run a pmjitter on “out” signal and convert the voltage noise to an equivalent dBc/Hz number using the following equation.
dBc=20 log_10⁡(((v_n √2)/slew_rate)*pi*f_o )

Here is the question. The sources dBc/Hz numbers are smaller compared to pmjitter numbers. Why?

On spectrum analyser what dBc/Hz numbers will be more realistic?

For driven circuits, how does one simulate realistic phase noise in dBc/Hz?

Back to top

View Profile   IP Logged
Pages: 1
Send Topic Print
Trouble viewing this site? Copyright © 2002-2018 Designer's Guide Consulting. 'Designer's Guide' is a registered trademark of Designer's Guide LLC. All rights reserved.

Our colleges are not as safe as they seem. Sexual assault is pervasive and the treatment of the victim by the adminstration is often as damaging as the assault: Campus Survivors, Campus Survivors Forum.

Some of our other sites that you might find useful: Avendesora, Inform and QuantiPhy.