— 47 —
IC1 TA2149N
1
2
3
4
5
6
7
8
16
17
18
19
20
21
22
23
24
15
14
13
11
12
10
9
V
CC
RF V
CC
RF GND
FM RFin
AM IF IN
FM IF IN
GND
AGC
QUAD
R-OUT
L-0UT
LPF2
LPF1
DET OUT
OSC OUT
AM OSC
FM OSC
AM RFin
MPX IN
FM RFout
IF REQ
ST LED
MIX OUT
AM LOW CUT
AM
MIX
FM
MIX
FM
OSC
AM
OSC
AM
DET
FM
DET
BUFF
BUFF
IF
BUFF
AF
BUFF
AF
FMRF
AMIF
AMIF
AGC
SW
ST
IF
REQ
1/8
LEVEL
DET
1/1 or
1/16
VCO
DIVIDE
DECODE
MUTE
ST/MO
FM/AM
IC2 LC72137
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
12bits PROGRAMMABLE
DIVIDER
UNIVERSAL
COUNTER
POWER
ON
RESET
1/2
X
REFERENCE
DIVIDER
19
XIN
12
FMIN
3
CL
4
DO
6
5
7
13
8
SWALLOW COUNTER
1/16, 1/17 4bits
16 PD
9
IO1
14
VDD
20
15
VSS
2
DI
1
CE
CCB
I/F
11
AMIN
DATA SHIFT REGISTER
LATCH
10 IFIN
18 AOUT
20
XOUT
17 AIN
IO2
BO4
BO3
BO2
BO1
