參數(shù)資料
型號: LA1838
元件分類: 接收器
英文描述: AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP30
封裝: SDIP-30
文件頁數(shù): 3/9頁
文件大小: 110K
代理商: LA1838
Block Diagram
AC Test Circuit
No. 5888-3/9
LA1838
ALC
VCC
GND
AGC
DET
AM I F
FM I F
REG
L.P.F
MUTE
BUFF
AM
OSC
AM
MIX
AM
RF.AMP
AM
S-METER
DECODER
ANTI- BIRDIE
AM/FM
I F-BUFF
TUNING
DRIVE
STEREO
DRIVE
FM
S-METER
S-CURVE
SD
COMP
FM
DET
T00147
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
P-DET
STEREO
SW
VCO
304kHz
FF
38k
FF
19k
2
-
π
FF
19k
∠θ
PILOT
DET
+
L.P.F
+
OSC
BUFF
FM IN
(10.7MHz)
AM IFT
T
U
-
LE
D
S
T
-
LE
D
A
M
-
IF
F
M
V
S
M
A
M
V
S
M
(S
D
-A
D
J)
A
M
/F
M
IF
-B
U
F
M
U
T
E
A
M
N
A
R
O
W
S
D
V T
F
M
S
D
A
D
J
A
M
A
G
C
AM -STEREO
L / R - INPUT
O
S
C
R
F
FM SD
BAND -W
L
L-OUT R-OUT
R
AM
MONO
VCC
FM
ST
0.047
F
0.047
F
0.047
F
0.047
F
0.047
F
10
F
0.47
F
SEEK1
00
0pF
1
F
1
F
1
F
100
0pF
47
F
0.047
F
0.01
F
0.033
F
10
F
10
F
0.033
F
10
F
0.047
F
0.047
F
33
F
3.3
F
22
F
100
0pF
39pF
20pF
1000pF
39mH
3k
50
18k
3.3k
3.3k
5.1k
300
75
68k
330
51
68k
5k
5k
5k
10k
3k
L.P.F
T00148
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
+
L.P.F
+
OSC
BUFF
(1.45MHz)
FM IN
(10.7MHz)
SD
ST
AM - ST
VSM
NORMAL
AM -IN
(1MHz)
OSC
REG
AFC
L-OUT R-OUT
MONO
VCC
FM
AM
STEREO
450kHz
(
)
FM
AM
VDD
IF
-
BUFF
9.0V
LA1838
T1
T 2
CDA10.7MGI-C
(For use as the DUT socket board)
The CDA10.7MG74 must be used for actual production models.
(Series resistance: 270
)
*
T1: HW-50425
T2: YD-1073-1
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