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參數資料
| 型號： | LA1784M |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封裝： | QIP-64 |
| 文件頁數： | 6/50頁 |
| 文件大小： | 568K |
| 代理商： | LA1784M |
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No. 6039-14/50
LA1784M
Pin No.
Function
Description
Equivalent circuit
41
A11736
+
2200 pF
20 k
20 k
VCC
42
+
–
DET
VCC
C
50 k
50 k
1 k
1 k
A11737
+
43
+
VCC
30 k
30 k
30 k
19 kHz
∠0°
BIAS
1
F
A11738
Continued from preceding page.
Continued on next page.
The HCC frequency characteristics
41
HCC capacitor
are determined by the external
capacitor connected at this pin.
This pin is used to change the
frequency characteristics of the
unneeded audio band under
100 Hz in AM mode to produce
a clear audio signal.
Note: The LC capacitor must be
connected between this pin
and VCC (pin 40).
42
AM L.C. pin
This is because the detector
circuit operates referenced
to VCC.
The cutoff frequency fC is
determined by the following
formula.
fC = 1/2π × 50 k × C
Inserting a 1-M
resistor between
43
Pilot detector
pin 43 and VCC will force the IC
to mono mode.
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