Designer’s Guide Community

Pages: 1

PSRR simulation using PSS+PAC (Read 4837 times)

ezencir New Member Offline Posts: 3 Irvine, CA	PSRR simulation using PSS+PAC Oct 25^th, 2006, 11:41am Hello All, Does anyone know how to simulate AM/PM PSRR using PSS+PAC of SpectreRF? Regards
Back to top	IP Logged

Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: PSRR simulation using PSS+PAC Reply #1 - Oct 25^th, 2006, 12:07pm Yes, of course. What is your question? Does it concern the AM/PM, the PSRR, or the PSS+PAC? -Ken
Back to top	IP Logged

ezencir

New Member

Offline

Posts: 3
Irvine, CA

Re: PSRR simulation using PSS+PAC
Reply #2 - Oct 25^th, 2006, 1:45pm

Hello Ken
When you do AC and XF to get PSRR you get the rejection performance for additive noise. If you would like to simulate the rejection to amplitude or phase modulating power supply disturbances you need to use PSS and PAC in conjunction. The question is how you do it? That is what I am asking.

Ertan

ezencir wrote on Oct 25^th, 2006, 11:41am:

Hello All,
Does anyone know how to simulate AM/PM PSRR using PSS+PAC of SpectreRF?

Regards

IP Logged

Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: PSRR simulation using PSS+PAC Reply #3 - Oct 25^th, 2006, 4:40pm You would specify pacmag=1 on your supply source, you would use the "modulated" version of PAC and select SSB/AM/PM. Run simulations. From Direct Plot, select PAC modulated, and plot AM and PM results. -Ken
Back to top	IP Logged

loose-electron Senior Fellow Offline Best Design Tool = Capable Designers Posts: 1638 San Diego California	Re: PSRR simulation using PSS+PAC Reply #4 - Nov 7^th, 2006, 7:59am A comment on the circuitry if I may - When a system is matched ideally, the PSRR results will look pretty good. For something more closely related to silicon, statistical mismatch of all elements (Monte Carlo) will give a more menaingful set of numbers. Jerry
Back to top	Jerry Twomey www.effectiveelectrons.com Read My Electronic Design Column Here Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical IP Logged

Pages: 1

‹ Previous topic | Next topic ›