aaron_do
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Hi BR,
that would be true in measurement, but in simulation, noise has to be simulated seperately. You only see circuit noise when you run noise simulations like "noise", "pnoise", or "transient noise". I'm not too sure about the whole matter, but I believe the "noise floor" you see in simulation is due to numerical inaccuracy related to the limited number of bits used in calculations. I don't remember the numbers, but I believe that "noise floor" is a lot lower than the -50 dBm I see in your plot.
cheers, Aaron
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