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• IC Block Diagrams
IC141 HA12181FP
16
IF
LPF
AMP
SW1
REFERENCE
VOLTAGE
CIRCUIT
1
2
IC210 LC72720M
VREF
1
ANTIALIASING
MPXIN
2
FILTER
3
VDDA
REFRENCE
VOLTAGE
4
VSSA
57KHz
BPF
(SCF)
SMOOTHING
FLOUT
5
FILTER
CIN
6
VREF
ERROR CORRECTION
T1
7
T2
8
TEST
T3
9
T4
10
T5
11
XOUT
12
IF AGC
DETECTOR
HPF1
LPF
PULSE
DETECTOR
REFERENCE
CURRENT
CIRCUIT
PHASE
SW2
CURRENT
LEVEL
DIFFERENCE
DETECTION
3
4
5
RAM
CCB
(24 BLOCK DATA)
MEMORY CONTROL
CLOCK
PLL
RECOVERY
(57KHz)
(1187.5Hz)
DATA
DECODER
SYNC/EC CONTROLLER
(SOFT DECISION)
CLK(4.332MHz)
SYNC
OSC/DIVIDER
DETECT-1
DETECT-2
15
14
13
VCC
OR
AF
AF
NOISE
AGC
AMP
AGC
HPF
PULSE
DETECT
2
HIGH PASS AMP
SW4
(WAVEFORM COMP.)
REFERENCE
CURRENT CIRCUIT
SW3
(WAVEFORM COMP.)
GND
6 7 8
IC531 MC14052B
2XCOM
24
SYR
23
CE
DI
22
CL
21
20
DO
IC821 L9637D
19
RDS-ID
18
SYNC
17
T7
16
T6
15
VSSD
SYNC
14
VDDD
13
XIN
– 46 –
12
11
PULSE
DETECT
1
GATE PULSE
GENERATOR
GATE PULSE 1
GATE PULSE 2
BUFFER
AMP
SW5
16
2X0
1
15
2X2
2
14
3
13
2X3
4
12
2X1
5
INH
6
11
VEE
7
10
VSS
8
9
8
7
6
1.75V
2
1
3
10 9
VDD
X2
X1
XCOM
X0
X3
A
B
5
4
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