Does the collector current in a transistor depend on the base-collector voltage in a common base configuration? If so,how does it depend mathematically?
Thanks. Can you also explain physically why it does not depend on the voltage of the other junction?The principle behaviour of a BJT does not depend on the specific configuration (common emitter, base or collector).
In any case, the famous Shockley equation applies: Ic=Is[exp(Vbe/VT) -1].
Hence, the collector current always is determined and controlled by the base-emitter voltage only.
I am aware that in some textbooks and other publications (in particular: Internet) it is stated that Ic would be controlled by Ib because of the relation Ic=B*Ib.
This relation holds, of course, and it is often used for designing simple transistor stages - however, it does not tell anything about cause and effect.
There are many properties and effects to be observed in BJT applications that can be explained ONLY with the above mentioned equation Ic=f(Vbe).
(I would not be surprised if this reply would cause some disagreements from other forum members; I have corresponding experiences.).
It depends! (I assume the question is if Ic depends, correct?).Thanks. Can you also explain physically why it does not depend on the voltage of the other junction?