Please see the circuit diagram as attached.
Given values are: β = 100, VBE= 0.7V, VCE= 0.3V and VA= infinite
Find: Ic & Vb
My solution: By a quick observation of the circuit we can find that transistors is operating in satuartion region not in active region. Because Ic = αIe ~ 1 mA; so, Vc is close to zero volt wich is less than zero.
One finds -5 + 5*Ic - Vce(satuation) = 0
or, Ic = (5-0.3)/5 = 0.94 mA
So, Ib = Ie - Ic = (1 - 0.94) = 0.06 mA
β(forced) = Ic/Ib = 0.94/0.06 = 15.67, which is smaller than given β = 100
Vb = 10 - 10*0.06 = 4.4 V
I am not feeling good with my solution!!!
Given values are: β = 100, VBE= 0.7V, VCE= 0.3V and VA= infinite
Find: Ic & Vb
My solution: By a quick observation of the circuit we can find that transistors is operating in satuartion region not in active region. Because Ic = αIe ~ 1 mA; so, Vc is close to zero volt wich is less than zero.
One finds -5 + 5*Ic - Vce(satuation) = 0
or, Ic = (5-0.3)/5 = 0.94 mA
So, Ib = Ie - Ic = (1 - 0.94) = 0.06 mA
β(forced) = Ic/Ib = 0.94/0.06 = 15.67, which is smaller than given β = 100
Vb = 10 - 10*0.06 = 4.4 V
I am not feeling good with my solution!!!