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IC21 LC72130
24
23
22
21
REFERENCE
DIVIDER
2
C B
I / F
3
4
1
2
IC41 LA1835
30
29
28
27
ALC
AM
AM
AM
OSC
MIX
RF.AMP
BUFF
S METER
AM
IF
AM/FM
IF
BUFF
LEVEL
DET
S-CURVE
FM
FM
IF
DET
REG
1
3
4
2
20
19
18
17
16
SWALLOW COUNTER
1/16.1/17 4bits
REFERENCE
DIVIDER
SWALLOW COUNTER
1/16.1/17 4bits
PHASE DETECTOR
CHARGE PUMP
DATA SHIFT REGISTER
LATCH
5
6
8
7
26
25
24
23
AGC
AM
DET
COMP
AM/FM
TUNING
DRIVE
SW
AM
FM
GND
5
6
7
8
15
14
13
POWER
ON
1/2
RESET
C B
I / F
9
10
11
12
22
21
20
19
18
DECODER
ANTI BIRDIE
STEREO
SW
STEREO
DRIVE
TRIG
FF
FF
FF
VCO
PILOT
DET
PHASE
DET
VCC
9
10
11
12
13
— 53 —
17
16
MUTE
14
15
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