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