Experiment: Multi-Transistor Amplifier

1.

Construct the multi-stage amplifier circuit in Fig. 2.14. Use R₁=100K, R₂=10K, R_C = 10K,  R_E1=1K, R_E2=10K. Using the information above, determine the values of the DC voltages V_C1, V_B1, V_E1, V_B2, V_E2, and V_C.

2.

Measure the DC values V_C1, V_B1, V_E1, V_B2, V_E2, and V_C. Compare your measured values with the calculated ones.

3.

Theoretically calculate the small signal gain of the circuit

4.

Input a 100kHz signal with amplitude of 0.1V into the circuit and measure the voltage gain. Compare the measured value with one you calculated above.

5.

Now, add a load resistor R_L=10K and measure the gain again. How would the gain change if the second stage were not there?