how to calculate noise figure ?

[alireza sm]

I have done simulation using hspice. it gives input voltage noise and output voltage noise diagrams.how can I calculate NF using these diagrams. simulation is about 2.4GHZ ac sweep.

 

[erikl]

See e.g. this application note, p. 5 .

 

[alireza sm]

this link doesn't work. please give a new link

thanks a lot

 

[BradtheRad]

The link sent me to this article:

"Understanding Op Amp Parameters"

**broken link removed**