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Using S-parameter files in Spectre (Read 4432 times)

chip Junior Member Offline Posts: 12	Using S-parameter files in Spectre Jan 23^rd, 2007, 6:02pm When we use Spectre simulation for such as noise figure and phase noise, can we use S-parameter files? Or it can NOT and the passive devices such as inductors must be included as a physical-meaningful model? Thanks a lot.
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ACWWong Community Fellow Offline Posts: 539 Oxford, UK	Re: Using S-parameter files in Spectre Reply #1 - Jan 24^th, 2007, 4:25am Yes, this topic has been covered very recently on this forum. Try doing a search or try: http://www.designers-guide.org/Forum/YaBB.pl?num=1169004722/3#3
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chip Junior Member Offline Posts: 12	Re: Using S-parameter files in Spectre Reply #2 - Jan 24^th, 2007, 7:43am Thank You Very Much
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chip

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Re: Using S-parameter files in Spectre
Reply #3 - Feb 2^nd, 2007, 12:32am

There is a problem when we use S-paramter file in Spectre simulation such as for phase noise and noise figure, because the simulator DO NOT know the "physical meaning" of the S-parameter--such as it does not know the impedance comes from a resistor of a inductance--for the later case, there is no noise from it. So for such kinds of simulations,we must use physical model in simulation. Yes?
Thanks

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pancho_hideboo Senior Fellow Offline Posts: 1424 Real Homeless	Re: Using S-parameter files in Spectre Reply #4 - Feb 2^nd, 2007, 1:47am Hi. Touchstone format data have noise paramers as option. However without this noise parameter option, S-parameter generates thermal noise. If you need additional noise other than thermal noise, you should add noise parameter. This is true if your S-parameter boxes are some active device circuits. �
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