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參數資料
| 型號： | LA42351 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 5 W, 1 CHANNEL, AUDIO AMPLIFIER, SFM13 |
| 封裝： | SIP-13 |
| 文件頁數： | 7/8頁 |
| 文件大?。?/td> | 88K |
| 代理商： | LA42351 |
LA75665NM
No.6954-7/12
Pin Functions
Pin No.
Pin
Description
Equivalent circuit
1
FM DET OUT
Audio FM detector output
A 300
resistor is inserted in series after the emitter
follower circuit.
Stereo applications
In some stereo decoding input applications, the input
impedance is comparatively low resulting in
distortion in the L-R signal and a degradation of the
stereo characteristics. If this is a problem, add a
resistor between pin 1 and ground.
R1
≥ 5.1k
Mono applications
Construct a deemphasis circuit with external
components.
t = CR2
2
SIF FILTER
Connection for a filter that holds the FM detector
output DC voltage level fixed. Normally, a 1
F
electrolytic capacitor is used. To improve the low
band (around 50Hz) frequency characteristics,
increase the value of this capacitor (C1). The FM
detector output level can be lowered by inserting a
resistor (R) in series with this capacitor. This can
increase the FM dynamic range.
5
6
VIF IN
VIF amplifier input
The input circuit is formed as a parallel circuit and
has the following input impedance.
R
≈ 1.5k
C
≈ 3pF
Continued on next page.
R2
300
10k
C
R1
1
2
+
1k
1k
C1
R
5
6
1k
1k
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