Assume that the nominal baseemitter junction forward voltage

Assume that the nominal baseemitter junction forward voltage is 0.7 V and the source voltage Vin is 10.8 V.  Calculate Vout , IE , and the base current IB .

Solution

Given, V_BE=0.7V, V_in=10.8V.

V_out=V_in-V_BE=10.8-0.7=10.1V.

Assume R_E =100 Ohms & R_B=1MOhm.

I_E = (V_in V_BE) / R_E =10.1/100= 0.101A.

I_B = (V_inV_BE) / R_B = 10.1/ 10⁶= 10.1 A.