ywguo
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Hello, Vincent,
I think the substrate and power noises depend on your circuit, package, and PCB. You'd better search a few papers about substrate noise on IEEExplore.
Generally, the issue is divided into two faces. One is the generation of switching noise, ther other is the shielding of the sensitive circuits.
If you want to simulate with substrate noise, please add the bonding wire model in your circuit, and put a small serial resistor, say 1 or 2 Ohm, in your voltage source. I though that is much easier and more accurate than PWL source generated using MATLAb. Obviously, the switching noise on substrate and power is not a PWL source, but often a damping sinusoidal source.
By the way, CMRR is a AC parameter, I don't think you can get it from a transient simulation.
I hope it is helpful to you.
Best regards,
Yawei Guo
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