1. (50 points) For the following circuit:
V1
50mVrms
500Hz
0°
C1
HH
1μF
R1
*20kΩ
R2
23.6ΚΩ
Q1
2N3904
R3
>220Ω
R4
1.2kQ
ㅔ
V2
12V
C3
1µF
C2
=1μF
R5
5kQ
Fig: 1