Electrical Engineering ⇒ Topic : Emitter Bias with Two Supplies

Emitter Bias with Two Supplies

The schematic diagram is shown in Figure (a).

    figure (a) Emitter bias with two supplies

In base emitter circuit, it can be written by KVL,

                   -I_BR_B -V_BE - I_ER_E+V_EE= O

       .......... (1)

If V_EE>> V_BE and R_E>>R_B/β, Eq. (1) can be written as:

                                                           .......... (2)

Stable Q-point can be obtained by using this method because two supplies (positive and negative). I_C is independent of β.