Samuel Groner
Well-known member
Hi
I recently read an article by Baxandall (published in Gayfords "Microphone Engineering Handbook") describing theoretical prediction of transistor noise. He concludes with the following equations for the equivalent noise resistances:
RNv = rbb + 1/(2*gm)
RNi = (2*hfe)/gm
where
gm = (q*Ic)/(k*T)
q = 1.6xe-19 C
k = Boltzmann
How do I include emitter resistors in this equations? Do they show up as series resistors of the base source impedance? This would mean I just add them to the equivalent noise resistances, right?
Thanks for your answers!
Samuel
I recently read an article by Baxandall (published in Gayfords "Microphone Engineering Handbook") describing theoretical prediction of transistor noise. He concludes with the following equations for the equivalent noise resistances:
RNv = rbb + 1/(2*gm)
RNi = (2*hfe)/gm
where
gm = (q*Ic)/(k*T)
q = 1.6xe-19 C
k = Boltzmann
How do I include emitter resistors in this equations? Do they show up as series resistors of the base source impedance? This would mean I just add them to the equivalent noise resistances, right?
Thanks for your answers!
Samuel