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參數(shù)資料
| 型號(hào)： | AN12941A |
| 廠商： | PANASONIC CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | The AN12941A is an amplifier IC for stereo speakers which can output 1 W by 8 Ohm or 2 W by 4 Ohm |
| 中文描述： | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, HSOP-56 |
| 文件頁數(shù)： | 21/41頁 |
| 文件大?。?/td> | 5959K |
| 代理商： | AN12941A |
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AN
12941
A
SDC
00056
AEB
21
■
Application Notes (continued)
4
. Signal detection system mix circuit block
AGC detection
1
) The signal inputted from pin
41
and pin
16
is rectified on both waves and then mixed with L + R.
2
) The above signal is peak-detected by the external part of pin
40
. External is giving double-detection
constant.
3
) When the voltage of pin
40
is equal or more than
0
.
7
V, AGC is on.
+
9 dB
+
3 dB
+
9 dB
+
3 dB
AGC
AGC
AGC
on/off
AGC
detection
2.4 V
for setting
AGC level
44
43
41
36
49
40
13
18
14
16
The output wave at the time of AGC operation
It is the following output wave form chart at the AGC operation time.
Graph showing output wave when identical sound signals are input to two AN
12941
A ICs, one with AGC
set to off and the other with AGC set to on.
Using identical input signals,
V
CC
, V
CC
_SP =
5
V
R
L
=
8
←
AGC off
←
AGC on
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