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(yè)數(shù)： 18/41頁(yè)
文件大?。?/td> 5959K
代理商： AN12941A
AN
12941
A
18
SDC
00056
AEB
■
Application Notes (continued)
2
. Signal detection system mix circuit block
Signal detection system mix circuit block
1
) Each input signal in accordance with mix ratio of
1
to
1
.
Signals are detected by separate systems to prevent cancellation in the case of negative phase input for main
signal R-channel and L-channel.
Main audio signal L-channel
Main audio signal R-channel
Beep signal
Signal from PCcard
Signal from modem
2
) Signal detection sensitivity can be adjusted with
10
k
external resistance connected between pin
50
and
pin
51
or pin
38
and pin
39
.
3
) The signals input via pin
38
and pin
50
first undergo double-wave rectification, and then peak detection is
performed using the external condensor connected to pin
21
.
10 k
10 k
10 k
10 k
0.47
μ
F
0.47
μ
F
0.047
μ
F
Signal detection
Audio signal
L-channel input
Modem signal
input
Beep input
Audio signal
R-channel input
PCcard input
52
54
56
2
6
51
50
39
38
21
Note) Adjust the detection sensitivity using
10
k
external resistance. If noise is high for the set, use more than
10
k
(between
about
10
k
and
200
k
).
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