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Simulators >> RF Simulators >> spectre pnoise noise separation
https://designers-guide.org/forum/YaBB.pl?num=1273674356

Message started by salty on May 12^th, 2010, 7:25am

Title: spectre pnoise noise separation
Post by salty on May 12^th, 2010, 7:25am

Can someone explain a little about the noise separation option in spectre pnoise analysis? I'm looking at a mixer noise sim and the results are a little confusing.

1> When I look at sideband 0 noise output, does that mean noise sources that do not experience a frequency translation?

2> Is this noise density all positive frequency of spread over pos and neg frequencies?

3> Likewise, for sideband -1 and 1, are those sidebands that experience frequency translation to my measurement output.

Thanks!

Title: Re: spectre pnoise noise separation
Post by pancho_hideboo on May 12^th, 2010, 8:05am

salty wrote on May 12^th, 2010, 7:25am:

1> When I look at sideband 0 noise output, does that mean noise sources that do not experience a frequency translation?

Yes.

salty wrote on May 12^th, 2010, 7:25am:

2> Is this noise density all positive frequency of spread over pos and neg frequencies?

Yes, it is a Single Sided PSD regardless of "freqaxis expression".
http://www.designers-guide.org/Forum/YaBB.pl?num=1258339986/38#38

salty wrote on May 12^th, 2010, 7:25am:

3> Likewise, for sideband -1 and 1, are those sidebands that experience frequency translation to my measurement output.

Yes.