Question 1: Answer the following questions about the
differential amplifier circuit.
(1) Fig. 1 shows a differential amplifier assembled with
transistors Tr1 and Tr2 with the same characteristics. Find the
degree of voltage amplification.
However, R1 = 10kΩ, R2 = 10kΩ, R3 = 1kΩ, R4 = 1kΩ, E = 10 [V],
hfe = 160, hie = 2.2kΩ.
R 3
R
E
.
V ol
V 02
T r2
T r1
E
R. 2
R
R E
Figure 1
Differential amplifier circuit