參數(shù)資料
型號: LA1787M
廠商: Sanyo Electric Co.,Ltd.
英文描述: Single-Chip Tuner IC for Car Radios
中文描述: 單芯片調(diào)諧器IC的汽車收音機
文件頁數(shù): 14/54頁
文件大小: 606K
代理商: LA1787M
No. 6655-14/54
LA1787M
Pin No.
Function
Description
Equivalent circuit
41
A13580
+
2200pF
20k
20k
VCC
42
+
DET
VCC
VCC
C
50k
50k
1k
1k
A13581
+
43
+
VCC
30k
30k
30k
19kHz
0
°
BIAS
1
μ
F
A13582
Continued from preceding page.
Continued on next page.
The HCC frequency characteristics
are determined by the external
capacitor connected at this pin.
41
HCC capacitor
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 V
CC
(pin 40).
This is because the detector
circuit operates referenced
to V
CC
.
42
AM L.C. pin
The cutoff frequency f
C
is
determined by the following
formula.
f
C
= 1/2
π ×
50 k
×
C
Inserting a 1-M
resistor between
pin 43 and V
CC
will force the IC
to mono mode.
43
Pilot detector
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