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參數(shù)資料
| 型號： | TA3020 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | Stereo 300W (4з) Class-T Digital Audio Amplifier Driver using Digital Power ProcessingTM Technology |
| 中文描述： | 立體聲300W的（4з）類- T數(shù)字音頻放大器驅(qū)動器使用數(shù)字電源ProcessingTM技術(shù) |
| 文件頁數(shù)： | 18/29頁 |
| 文件大?。?/td> | 284K |
| 代理商： | TA3020 |
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T E C H N I C A L I N F O R M A T I O N
18
TA3020, Rev 2.1, 01.01
MODULATOR
V
E
VINPUTSTAG
VTA3020
A
*
A
A
=
+
+
≈
1
R
*
R
)
R
(R
*
R
R
R
A
FBB
FBA
FBB
FBA
FBC
I
F
VTA3020
For example, using a TA3020 with the following external components,
R
I
= 20k
R
F
= 20k
R
FBA
= 1k
R
FBB
= 1.13k
R
FBC
= 9.09k
13.3k
Ω
49.9k
Ω
Input Stage Design
The TA3020 input stage is configured as an inverting amplifier, allowing the system designer
flexibility in setting the input stage gain and frequency response. Figure 2 shows a typical
application where the input stage is a constant gain inverting amplifier. The input stage gain should
be set so that the maximum input signal level will drive the input stage output to 4Vpp.
V
V
10.71
-
=
1
1.07k
Ω
*
1.0k
Ω
)
1.07k
(1.0k
Ω
*
20k
Ω
A
VTA3020
+
+
≈
Figure 2: Input Stage
The gain of the input stage, above the low frequency high pass filter point, is that of a simple
inverting amplifier:
R
A
=
I
F
E
VINPUTSTAG
R
AGND
RI
INPUT1
INV1
RF
V5
V5
CI
OAOUT1
TA3020
RI
+
-
INV2
OAOUT2
BIASCAP
RF
+
-
CI
AGND
INPUT2
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