
Block Diagram
6
9
Ripple Filter
VCC
IN1
4 IN1
OUT1
AMP1
7
5
400 Ω
3 Pre-GND
400 Ω
1
20 kΩ
20 kΩ
PW-GND 10
AMP2
12
IN2
2 IN2
OUT2
8
11
TA8216HQ
VCC
RL
RL
Application Information
1. Voltage gain
The closed loop voltage gain is determined by R1, R2.
GV
=
20log
R1 + R2
R2
(dB)
=
20log
20
kΩ +
400
400
Ω
Ω
= 34 (dB)
GV
= 20log
R1 + R2 + R3
R2 + R3
(dB)
When R3 = 220 Ω
GV ∼− 30 (dB)
is given.
Input
4/2
7/12
R2
R1
5/1
400 Ω 20 kΩ
Output
Figure 1
Input
4/2
R3
5/1
R2
R1
400 Ω 20 kΩ
7/12
Output
Figure 2
2
2004-08-25