Stats

  • Locked Locked
  • Replies 0
  • Subscribers 63
  • Views 14624
  • 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

Threshold crossing problem in Pnoise jitter mode

ycyang

Hi,

I am running a jitter simulation of a PFD.
I use the PSS and Pnoise in jitter mode.
Since the supply voltage is 1.2 V, the threshold crossing voltage is specified to 0.6V.
When I check the simuation result, I find Jee is too small (several tens of fs).
Then I check the threshold crossing in the direct plot form.
I find the crossing voltage is not what I've specified.
The result is shown below:


My setting is:

PSS
Beat frequency = 32.768kHz
Number of harmonics=7
error preset=moderate

Pnoise
sweep type=relative to 1
sweep frequency from 100Hz to 16kHz
Max sideband=7
Threshold crossing=0.6

My MMSIM version is 7.2ISR7.

Could anybody help me to figure out this problem?
Thanks

ycyang

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.