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combine the Darlington

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mtkee2003

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hi

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

regards
 

Sal

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Hi

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

mtkee2003

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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

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

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