Stats

Locked Locked
Replies 3
Subscribers 63
Views 15352
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

How to simulate Phase Noise of the clock at rising edge and falling edge separately.

RFQuery over 12 years ago

Dear all,

I am trying to measure the phase noise of my circuit output clock at rising edge and falling edge separately.

I am able to measure the overall phase noise of the clock using PSS/PNOISE but not separately.

Could anybody please tell how to simulate that in SpectreRF.

Kind Regards

Tawna over 12 years ago

Hi RFQuery,

Please look at the MMSIM12.1 SpectreRF User Guide. Specifically, look at the pnoise jitter section.

If you don’t have the SpectreRF User Guide for MMSIM12.1, you can view it on Cadence Online Support.

Best regards,
Tawna
Cancel
Vote Up 0 Vote Down

Cancel
RFQuery over 12 years ago

Hi Tawna,

I searched SpectreRF User Guide for MMSIM12.1. But I couldn't find how the rising edge phase noise and falling edge phase noise can be simulated separately.

Could you please point me to the location where it explains how it can be done.

Kind Regards,
Cancel
Vote Up 0 Vote Down

Cancel
Andrew Beckett over 12 years ago

This would be covered in the "jitter" mode of pnoise. You need to use the "PM" mode of that (which happens all the time when simulating a driven circuit, but is a choice for oscillators). In PM jitter, you specify a threshold, and then you'll get the jitter computed at each transition.
Regards,
Andrew.
Cancel
Vote Up 0 Vote Down

Cancel

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.