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Simulators >> RF Simulators >> fundamental questions about periodic steady state and pss analysis
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Message started by henrywent on Jul 14^th, 2009, 7:13pm

Title: fundamental questions about periodic steady state and pss analysis
Post by henrywent on Jul 14^th, 2009, 7:13pm

hi there,
what is the difference between the steady state of a circuit (in the context of analog design) and the periodic steady state of a circuit (in the context of RF design)? And the difference between pss analysis and DC analysis(or maybe AC , tran?).I am really confused about these concepts, please help!

Title: Re: fundamental questions about periodic steady state and pss analysis
Post by currant on Jul 15^th, 2009, 12:35am

As I understand:
In pss analysis we get a variable with fundamental frequency operating point .
In dc (op) analysis we get constant operating point, which is used to calculate small-signal parameters.
In tran analysis OP calculate at every time step.

So pss plays OP analysis role for all small-signal periodic analyses.

Title: Re: fundamental questions about periodic steady state and pss analysis
Post by Andrew Beckett on Jul 15^th, 2009, 12:40am

Take a look at this paper (you'd find this in the Analysis link at the top of the Designer's Guide page) http://www.designers-guide.org/Analysis/rf-sim.pdf, in particular at section 4.

Regards,

Andrew.