combine the Darlington

mtkee2003 · Jan 28, 2006

hi

if we want to medel the "BJT Darlington stage" with only one BJT, what is that model.

regards

Sal · Jan 28, 2006

Hi

it is same as one BJT, just the current gain is Beta1*Beta2

mtkee2003 · Jan 28, 2006

hi Sal,

your model is an approximate model.

for example it is not true about ro_1 and ro_2.(output resistances of each BJT)

regards

throwaway18 · Jan 28, 2006

Also the base to emitter voltage will be around 1.4V instead of 0.7V when the transistor is on.

A.Anand Srinivasan · Jan 29, 2006

you just gotta model a BJT with a Vbe drop of 1.4V that's all

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