C SYNC
VIDEO
INPUT
(Pin 2)
-
-
V SLICE
COMPOSITE
SYNC OUTPUT
(Pin 1)
+
HORIZONTAL
+
-
V CLAMP
+
WINDOWING
CIRCUIT
D
Q
D
Q
ODD / EVEN
OUTPUT
(Pin 7)
G
Q
CLK Q
11µ
85µ
NOSYNC
V
CC
(Pin 8)
D
VOLTAGE
REGULATOR
1.2V
Q
VERTICAL
DETECTOR
VERTICAL SYNC
OUTPUT
(PIN 3)
CLK Q
R_SET
(Pin 6)
BACK PORCH
OUTPUT
(Pin 5)
BACK PORCH
DETECTOR
TIMING
CURRENTS
Fig. 17 GS1881 Block Diagram
C SYNC
VIDEO
INPUT
(Pin 2)
-
-
V SLICE
COMPOSITE
SYNC OUTPUT
(Pin 1)
+
HORIZONTAL
+
-
V CLAMP
+
WINDOWING
CIRCUIT
D
Q
D
Q
ODD / EVEN
OUTPUT
(Pin 7)
G
Q
CLK Q
11µ
85µ
NOSYNC
B PEN
V
CC
(Pin 8)
VOLTAGE
REGULATOR
D
VERTICAL
DETECTOR
Q
VERTICAL SYNC
OUTPUT
(PIN 3)
CLK Q
1.2V
R_SET
(Pin 6)
BACK PORCH
OUTPUT
(Pin 5)
BACK PORCH
DETECTOR
TIMING
CURRENTS
Fig. 18 GS4881 Block Diagram
9
520 - 23 - 03
GENNUM [ GENNUM CORPORATION ]
