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• IC Block Diagrams
IC141 HA12181FP
IC210 LC72720M
IC531 MC14052B
IC821 L9637D
IF
AMP
LPF
IF AGC
DETECTOR
PULSE
DETECTOR
HPF1
LPF
AF
AMP
AF
AGC
OR
HPF
NOISE
AGC
PULSE
DETECT
1
PULSE
DETECT
2
GATE PULSE
GENERATOR
REFERENCE
CURRENT
CIRCUIT
SW2
SW1
REFERENCE
VOLTAGE
CIRCUIT
PHASE
CURRENT
LEVEL
DIFFERENCE
DETECTION
SW3
HIGH PASS AMP
(WAVEFORM COMP.)
SW4
REFERENCE
CURRENT CIRCUIT
(WAVEFORM COMP.)
SW5
BUFFER
AMP
11
10 9
12
14
13
15
16
1
2
4
5
3
6
7
8
GATE PULSE 2
GATE PULSE 1
VCC
GND
IFAGC
BIAS1
AF-IN
BIAS2
PHASE
HOLD
GND
HP
IF-IN
AFAGC
IFDET
VCC
VTH
GATE
WF
AFOUT
SYR
CE
DI
DO
CL
RDS-ID
SYNC
T7
T6
VSSD
VDDD
XIN
ANTIALIASING
FILTER
57KHz
BPF
(SCF)
PLL
(57KHz)
CLOCK
RECOVERY
(1187.5Hz)
OSC/DIVIDER
DATA
DECODER
SYNC
DETECT-1
SYNC
DETECT-2
CCB
RAM
(24 BLOCK DATA)
MEMORY CONTROL
SYNC/EC CONTROLLER
ERROR CORRECTION
(SOFT DECISION)
SMOOTHING
FILTER
TEST
CLK(4.332MHz)
VREF
VREF
MPXIN
VDDA
VSSA
FLOUT
CIN
T1
T2
T3
T4
T5
XOUT
2
3
4
5
6
7
8
9
10
11
12
1
22
23
24
21
20
19
18
17
16
13
15
14
+
–
REFRENCE
VOLTAGE
1
2
3
4
5
6
7
8
1.75V
DRIVER
DRIVER
DRIVER
RX
TX
VCC
LO
LI
GND
K
VS
+
–
+
–
+
–
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
2X0
X2
VDD
X1
XCOM
X0
X3
A
B
VSS
VEE
INH
2X1
2X3
2XCOM
2X2
