GS1881_09 Datasheet, PDF (18/29 Pages) Gennum Corporation – Monolithic Video Sync Separators

VIDEO
INPUT
-
(Pin 2)
+
11μ
85μ
-
V SLICE ⁺
-
V CLAMP ⁺
C SYNC
V_CC
(Pin 8)
R_SET
(Pin 6)
VOLTAGE
REGULATOR
1.2V
TIMING
CURRENTS
Figure 4-6: GS4881 Block Diagram
VIDEO
INPUT
-
(Pin 2)
+
11μ
85μ
-
V1
+
-
V2
+
C SYNC
V_CC
(Pin 8)
R_SET
(Pin 6)
VOLTAGE
REGULATOR
1.2V
TIMING
CURRENTS
Figure 4-7: GS4981 Block Diagram
HORIZONTAL
WINDOWING
CIRCUIT
NOSYNC
B PEN
VERTICAL
DETECTOR
BACK PORCH
DETECTOR
COMPOSITE
SYNC OUTPUT
(Pin 1)
DQ
GQ
DQ
CLK ^Q
ODD / EVEN
OUTPUT
(Pin 7)
DQ
CLK ^Q
VERTICAL SYNC
OUTPUT
(PIN 3)
BACK PORCH
OUTPUT
(Pin 5)
WINDOWING
CIRCUIT
NOSYNC
B PEN
VERTICAL
DETECTOR
BACK PORCH
DETECTOR
COMPOSITE
SYNC OUTPUT
(Pin 1)
10k
HORIZONTAL
OUTPUT
(Pin 7)
DQ
CLK Q
VERTICAL SYNC
OUTPUT
(PIN 3)
BACK PORCH
OUTPUT
(Pin 5)
GS1881, GS4881, GS4981 Monolithic Video Sync
Separators
Data Sheet
6926 - 5
November 2009
18 of 29
Proprietary & Confidential