wwm101 wrote on May 26th, 2008, 6:38am:in Federio Bruccoleri doctor degree’s paper
he assumes the MOST only have drain noise (channel noise)
then definitely the drain noise I2n/△f=4KT*r*gm=4KT*NEF*gm
In the above, "r" is equal to "NEF" ?. And this is typically 2/3 ?
wwm101 wrote on May 26th, 2008, 6:38am:in follow schematic, he calculated the noise factor equal to 1+NEFa+4NEF(AVF-1)/AVF2 at ΔNEF=NEFb-NEFa And gb+1/ZL>>0(gb+1/ZL=gb)
In the above, what do you mean by "NEF" in "4NEF" ? What is A
VF ?
What do you mean by "0(g
b+1/Z
L=g
b)" ?
Maybe a topology you refer is "Amp-1" in the following.
Quote:You can derive Noise Factor equation easily if you trace all formulations and equations in the above.
You have more detail documentation(PhD dissertation), don't you ?