ET212

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.

a. VB

b. VE

c. IE

d. VC

e. VCE

Figure 1

2. Given the figure 2 below, calculate:

· emitter current (IE)

· collector voltage (VC)

Figure 2

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

c. VB

c. VE

c. IE

c. VC

c. VCE

Figure 3. PNP Transistor