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A question on STB analysis of OSC (Read 179 times)
chang830
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A question on STB analysis of OSC
Dec 02nd, 2024, 5:07am  
Hi , I have  a problem on simulation of xtal oscillator. When I simulatie a Santos xtal OSC, I use STB to get its gainmargin which I found it is -1.5dB.So it should not to oscillate, but I found it can oscillate corectly when I use transisent analysis.  Can anyone explain this descranpcy?

Thanks a lot!
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sheldon
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Re: A question on STB analysis of OSC
Reply #1 - Dec 2nd, 2024, 10:39am  
Chang,

  Are you using stability analysis or periodic stability analysis?

                                                                        Sheldon
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chang830
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Re: A question on STB analysis of OSC
Reply #2 - Dec 2nd, 2024, 5:35pm  
Dear Sheldon，  I use stability analysis. I think in the beginning of the buildup, it is linear.
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