The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> Circuit Simulators >> how can i simulate pll's phase noise with HSPICE
https://designers-guide.org/forum/YaBB.pl?num=1079622117

Message started by jeffyan on Mar 18^th, 2004, 7:01am

Title: how can i simulate pll's phase noise with HSPICE
Post by jeffyan on Mar 18^th, 2004, 7:01am

how can i simulate pll's phase noise with HSPICE?

thanks in advance

jeff

Title: Re: how can i simulate pll's phase noise with HSPI
Post by August West on Mar 18^th, 2004, 9:09pm

There are two cases to consider. If the phase noise is deterministic (due to deterministic noise on the supply, dead-band jitter, etc.) you just run a very long transient and post-process the waveforms to extract the zero crossings. If the phase noise is due to non-deterministic sources, such as thermal or flicker noise sources, you'll need to turn in your HSpice license for a SpectreRF license. And frankly, you'll be happy you did. SpectreRF is very cool.

-August

Title: Re: how can i simulate pll's phase noise with HSPI
Post by Spice_Oracle on May 20^th, 2004, 3:42pm

There is a new extension to HSPICE called HSPICE RF that includes oscillator steady state analysis and phase noise analysis. If you are a HSPICE user, this might be the best solution since it allows you to use your existing HSPICE netlist and model libraries.