la7210 Sanyo Semiconductor Corporation, la7210 Datasheet - Page 3

• Manufacturer Part Number: la7210
• Description: Vcr Sync Detection Circuit
• Manufacturer: Sanyo Semiconductor Corporation

Equivalent Circuit Block Diagram
Test Circuit Diagram
f OSC
15kΩ
Ceramic (Murata)
SG1
V OSC
1.2kΩ
CSB500E5
1/32 countdown
1
ATT
V6IN
1
VOC 32 f H
2
2
1000p 330p
f 8H/L
1kΩ
3
33Ω
0.47µF
3
b
4
SG2
+
AFC
SW5
330kΩ
4
a
SG1 : Use a standard color bar (EBU) and take 0dB to be 1Vp-p.
SG2 : Pulse generator (See the figure below.)
LA7210
b
Video input
5
1000p
a
c
220Ω
LA7210
SW1
1µF
GND
5
+
6
Sync separator
SW2
10kΩ
75kΩ
6
7
V 80
18kΩ
AND
a
c
+
a
b
4µs
0.47
µF
7
8
SW3 SW4
20kΩ
b
Amplifier
V 8H
V 8L
16
mA
9
8
Variable frequency
a
0.3Vp-p
10
3.3kΩ
V CC
Comparator
b
VR
100kΩ
9
V 10
Output
+
10
10µF
I CC
mA
+9.0V
V CC
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