sheldon
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JC,
First question, the units of noise you are simulating are less than 1e-24 A^2/Hz, are the simulator tolerances set appropriately for this accuracy? Next question, what frequency does the oscillator oscillate at? Does it oscillate at the frequency of the spike? Since there are still sources of noise in the simulation, Rload, could the spike be due to insufficient frequency resolution? If you just plot the spike does it look more like the expected phase noise plot of the oscillator?
Best Regards,
Sheldon
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