Question: For the transistor circuit shown in Fig.14.19, evaluate VE, RB, RE given IC = 1 mA, VCE = 3V, VBE = 0.5 V and VCC = 12 V, β = 100.
Solution:
Ic = Ie
Rc = 7.8 kilo ohm
Ic (Rc + Re) + Vce = 12
Ve = 1.2 V
Vb = Ve + Vbe = 1.7 V
I = 0.085 mA
Rb = 108 kilo ohms
