Transistor Biasing

1. Given a BJT unloaded amplifier shown in figure 1 below with β=100.

• Draw DC equivalent circuits of this unloaded amplifier.
• Draw the DC load line of the circuit.
• Determine the following dc values for the amplifier.

1. V_B
2. V_E
3. I_E
4. V_C
5. VC_E

Figure 1

2. Given the figure 2 below, calculate:

• emitter current (I_E)
• collector voltage (V_C)

3. Given circuit in figure 3 with the labeled parameters, calculate the following:

1. V_B
2. V_E
3. I_E
4. V_C
5. V_CE

                                                   Figure 3. PNP Transistor