Frank,
Thanks for your reply.
Frank Wiedmann wrote on Jul 9th, 2007, 11:49pm:..........what surprises me is the fact that the noise power does not increase linearly with the number of sidebands in the pnoise sources analysis.......
This is because the max noise power is limited by the noise source with the PSD 4kTR in the pnoise sources analysis.
But what surprises me is that why I can't see that limit in the pnoise tdnoise analysis, in which the power is increasing almost linear with the number of sidebands. Or maybe, as you have said, it is caused by the ideal behavior FET model without capacitive effect.
And do you have any ideal about which simulation setting will probably cause this strange phenomenon?
-JC