Maryam wrote on Sep 6th, 2008, 5:19pm:Yes, the results were different in these two cases,
in terms of the duty cycle of transistors being in triode and the amplitude of the voltages.
I can't believe that remarkable discrepancies exist although convergence succeed with reasonable ConvNorm.
Show me result's graph which show discrepancy with each ConvNorm.
Maryam wrote on Sep 6th, 2008, 5:19pm:I simulated a transient with moderate settings; the results were fine.
Make your issues correct and clear.
(1) Transient Analysis of errpreset=liberal --->> unreasonable results
(2) Transient Analysis of errpreset=moderate --->> reasonable results
(3) Transient Analysis of errpreset=conservative --->> reasonable results
(4) PSS Analysis of errpreset=conservative --->> often give unreasonable results
From your description I understand that transient(moderate) analysis give reasonable results while pss analysis often give unreasonable results.
Is this correct ?
How about PSS(moderate) with all default setting ?
Compare two cases, transient(moderate) and pss(moderate).
Is there remarkable difference between two ?
Maryam wrote on Sep 6th, 2008, 5:23pm:By the way, in general, the pss simulation of my circuit does not always converge.
I keep simulating it several times and change the integration methods (mostly default, gear2, gear2only and sometimes trap and traponly)
until I get convergence.
Try to use Harmonic Balance PSS not Shooting Newton PSS.