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# Working out the NOISE Equations

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#### derek_lkm

##### Newbie level 3
To the Gurus out there,

I'm trying to do some co-relation between the classical noise figure

F=1+{Gu+[(Gc+Gs)^2+(Bc+Bs)^2)]Rn}/Gs

by working from

F= total output noise power/ output noise due to input source.

So far i'm able to calculate the total ouput noise, consisting of 3 variables.
Namely Ions, Iong and Iond. However i stumped trying to work out the correlation.

total ouput noise power = ions² +|iong+iond|²
= ions² + iong² + iond² +iong×iond* + iond*×iong ...(1)

where |c|√iong²√iond²= iong X iond* ....(2)

Equations (2) can be sub into the 3rd term of (1). However i not sure how to the complex conjugate would (2) can be modified to sub into the 4th term of (1)????

Appreciate any comments or help. It would be really great if someone has work out the problem in detailed steps to share.

PS: i know the terms are mean square, however i could not find the fonts to add the line above.

Thanks

Regards
Derek

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