Datasheet

12
LT1675/LT1675-1
16751fb
TYPICAL APPLICATIO S
U
RGB Video Inverter
RED
VIDEO IN GREEN
BLUE
75Ω
75Ω
75Ω
75Ω
CABLE
CABLE
CABLE
V
+
V
–
SELECT
1675 TA03
ENABLE
COMPOSITE
BLANKING
97.6Ω
97.6Ω
97.6Ω
V
OUT RED
75Ω
LT1675
75Ω
V
OUT GREEN
V
OUT BLUE
+1
+1
+2
+2
+2
+1
+1
+1
+1
332Ω 332Ω
+
–
332Ω 332Ω
+
–
332Ω
10k
10k
LT1634
LT1399
5V
0.714V
1.25V
332Ω
+
–
This circuit is useful for viewing photographic negatives
on video. A single channel can be used for composite or
monochrome video. The inverting amplifier stages are
only switched in during active video so the blanking, sync
and color burst (if present) are not disturbed. To prevent
video from swinging negative, a voltage offset equal to the
peak video signal is added to the inverted signal.