EE212 week 4 assignment

DC Analysis of Transistor and DC Load Line

1. For the common emitter circuit shown below (see figure 1) the parameters are:

   V_BB = 4 V, R_B = 220 kΩ, R_C = 2 kΩ, V_CC = 10 V, V_BE(on) = 0.7 V, and β = 200. Calculate the base current (I_B), collector current (I_C), emitter currents (I_E), the V_CE voltage and the transistor power dissipation (PT). Show all work.

   

   Figure 1

2. In the CC circuit shown in Figure 2, calculate the following:
   • I_B
   • I_E
   • V_CE
   • V_E
   • V_B. Take β = 49 and V_BE = 0.7 V.

   

   Figure 2

3. For the circuit shown in Figure 3 below, draw the DC load line and locate its quiescent or DC working point. Show all work.

   

   Figure 3

4. The data sheet entry that lists how much the power rating of a device has to be reduced is the__________________.
5. In a common-emitter circuit, once the base current has been calculated, collector current can be determined by multiplying the base current by ________.