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Noise Figure Analysis Question

Question asked by KOSTAS on Jun 26, 2006
My problem is like that, in a lot of ADS examples i have seen that using S-parameters analysis simulation controler you can calculate the NF of an amplifier using its Spice model. Is that correct ?

I have tried myself comparing the spice results for the noise figure with the ones provided from a manufacturer and found different answers. The device i used was a philips one, BF41,where a spice model was provided and a S parameters with NFmin as well. The results didnt much at all.

Any help will be apreciated