For the transistor circuit shown
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

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