For the transistor circuit shown in Fig.14.19, evaluate V_E, R_B, R_E given I_C = 1 mA, V_CE = 3V, V_BE = 0.5 V and V_CC = 12 V, β = 100.

Question

For the transistor circuit shown in Fig.14.19, evaluate V E , R B , R E given I C = 1 mA, V CE = 3V, V BE = 0.5 V and V CC = 12 V, β = 100.

Philoid · Accepted Answer

Circuit Diagram:

From loop1 we get,

Also,

Now V_E is the potential drop across R_E. Hence,

To find R_B we need to find the current through it. This can be done by finding the potential across the 20k resistance.

Also 0.01mA current goes to the base. Hence amount of current through R_B will be i_B=0.0945mA.

So, the value of R_B will be,