-45-
IC BLOCK DIAGRAM -1/1
IC, LA1845N-A
BIASC
VREFC
1
2
RREF
3
N. C.
4
DIFOUT
5
N. C.
6
CIN
7
AIN
8
Vcc
9
A
C
DIF
A-C
BIAS
Vref
REFERENCE CURRENT
PEAK
HOLD
340Hz
BPF
PEAK
HOLD
1kHz
BPF
PEAK
HOLD
3.4kHz
BPF
10.5kHz
BPF
RES
RES
RES
RES
RES
MPX
DEC
18
GND
17
AOUT
16
TEST
15
N. C.
14
SEL
13
N. C.
12
C
11
B
10
A
PEAK
HOLD
PEAK
HOLD
105Hz
BPF
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
OE
SO
Q11
Q10
Q9
Q8
Q7
Q6
Q5
Vss
N.C.
DATA
CLOCK
LCK
Q0
Q1
Q2
Q3
Q4
CONTROL
CIRCUIT
L. P. F
OUTPUT
BUFFER (Open Drain)
12BIT
ST
ORAGE RAGESTER
12BIT
SHIFT
RAGESTER
IC, LC72131D-N
IC, BU2092F
IC, BA3835F
IC, M61518FP
IC, BU2099FV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
LOGIC
OUTPUT
BUFFER (OPEN DRAIN)
12BIT
ST
ORAGE REGISTER
12BIT
SHIFT
REGISTER
1
22
16
15
3
4
5
6
17
21
7
8
9
10
11
13
12
20
19
18
REFERENCE
DIVIDER
SWALLOW COUNTER
1/16, 1/17 4bits
1/2
PHASE DETECTOR
CHARGE PUMP
UNLOCK
CETECTOR
UNIVERSAL
COUNTER
ALC
23
24
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
AM
OSC
BUFF
LEVEL
DET
FM
IF
S-CURVE
FM
DET
REG
AM/
FM
IF
BUFF
COMP
TUNING
DRIVE
GND
AM
MIX
AM
RF. AMP
AGC
AM
IF
AM
DET
DECODER
ANT-BIRDIE
P-DET
ø
STEREO
SW
PILOT
CANCEL
PILOT
DET
FF
19k 0
FF
π
19k 2
FF
38k
VCO
304kHz
VCC
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299