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PSRR simulation using PSS+PAC (Read 4835 times)
ezencir
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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
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Ken Kundert
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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
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ezencir
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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
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Ken Kundert
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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
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loose-electron
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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
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Jerry Twomey
www.effectiveelectrons.com
Read My Electronic Design Column Here
Contract IC-PCB-System Design - Analog, Mixed Signal, RF & Medical
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