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4-10. IC BLOCK DIAGRAMS
IC21
LC72130
20
24
23
22
21
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
REFERENCE
SWALLOW COUNTER
DIVIDER
2
C
B
I/F
2
3 4 5 6
1
IC41
LA1835
30
29
28
27
ALC
AM
AM
AM
OSC
MIX
RF. AMP
BUFF
S METER
FM
IF
AM/FM
IF
LEVEL
S-CURVE
BUFF
DET
TUNING
DRIVE
FM
FM
DET
IF
REG
1
2 3
4
5
IC1701 IR3R42
20
19 18
17
1/2
1/2
OSC
AMP
PHASE
WAVEFORM
SEP.
AMP
REGULATOR
SAMPLE
GATE
& HOLD
BUFFER
1
2
3
4
19
18
17
16
15
POWER
ON
1/2
RESET
1/16, 1/17 4BITS
12BITS PROGRAMMABLE
DRIVER
DATA SHIFT REGISTER LATCH
7
8
9
10
11
26
25
24
23
22
AGC
AM
DET
COMP
AM/FM
SW
AM
FM
GND
VCC
6
7
8
9
10
16
15
14 13
12
AMP
PHASE
COMPARATOR
PHASE
COMPARATOR 2
TRIGGER
MUTE
5
6 7
8
9
14
13
UNIVERSAL
COUNTER
12
20
19
18
17 16
21
DECODER
ANTI BIRDIE
STEREO
SW
STEREO
DRIVE
TRIG
MUTE
FF
FF
FF
VCO
PILOT
DET
PHASE
DET
11
12
13
14
11
10
– 33 –
15
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