525
1
2
3
4
5
6
7
8
COMPOSITE
VIDEO INPUT
COMPOSITE SYNC OUTPUT
GS4882
BACK PORCH OUTPUT
GS4882, GS4982
HORIZONTAL OUTPUT
GS4982
VERTICAL SYNC OUTPUT
GS4882, GS4982
ODD/EVEN OUTPUT
GS4882, GS4982
HSYNC INTERNAL
600ns
2.5µs
COMPOSITE
VIDEO INPUT
BACK PORCH
OUTPUT
525ns
2.5µs
Fig. 8
GS4882, GS4982 Video Sync Separator Timing Diagram
V
CC
0.1
V
EE
0.1
8
VIDEO
10
75Ω
0.1
V
CLAMP
6
R
OUT
C
L
CLAMPED
VIDEO
OUTPUT
GB4571
2
STROBED
7
DC RESTORE
3
C
HOLD
1.0nF
1
4
5
V
CC
8
GS4882
SYNC
SEPARATOR
4
5
6
2
0.1
BACK
PORCH
PULSE
227k
All resistors in ohms, all capacitors
in microfarads unless otherwise stated
0.1
Fig. 9
Typical NTSC Application Diagram
521 - 61 - 01
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