Will it be around 0.2V next to Saturation point?

 

First let's assume that BJT is in active region for R_load = 2.2k.
This means that Ie = 4mA and Ve = 4V. Now let's try to find Vc voltage.
Vc = Vcc - Ic*Rc ≈ 3.24V and Vce = Vc - Ve = 3.24V - 4V = -0.76V

So we get negative Vce value, but negative value is impossible to get in this circuit . And this means that our BJT is indeed in saturation region. And in saturation region Ic = β*Ib don't hold anymore. In saturation we can only rely on this Ie = Ib + Ic and basic electronics laws. Also we are forced to assume some Vce_sat value.

 

First let's assume that BJT is in active region for R_load = 2.2k.
This means that Ie = 4mA and Ve = 4V. Now let's try to find Vc voltage.
Vc = Vcc - Ic*Rc ≈ 3.24V and Vce = Vc - Ve = 3.24V - 4V = -0.76V

So we get negative Vce value, but negative value is impossible to get in this circuit . And this means that our BJT is indeed in saturation region. And in saturation region Ic = β*Ib don't hold anymore. In saturation we can only rely on this Ie = Ib + Ic and basic electronics laws. Also we are forced to assume some Vce_sat value.

Ok, let me just ask where is Vc in the circuit? I got confused now!

 

Ok, let me just ask where is Vc in the circuit? I got confused now!

hi,
Look at this link and the clip from the link document.
http://books.google.co.uk/books?id=...onepage&q=transistor voltage notation&f=false

 

Ok, thanks for everything.

This job is almost done. My next one will be about mosfets...

I will start a new thread maybe tomorrow!