Datasheet

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SBOS235E − MARCH 2002− REVISED MAY 2009
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14
WIDEBAND VIDEO MULTIPLEXING
One common application for video speed amplifiers which
include an enable pin is to wire multiple amplifier outputs
together, then select which one of several possible video
inputs to source onto a single line. This simple Wired-OR
Video Multiplexer can be easily implemented using the
OPA357; see Figure 6.
1k
Ω
A
OPA357
+2.5V
1
µ
F10nF
−
2.5V
49.9
Ω
V
OUT
49.9
Ω
Signal #1
49.9
Ω
1k
Ω
+
1
µ
F10nF
+
1k
Ω
HCO4
B
OPA357
+2.5V
1
µ
F10nF
−
2.5V
49.9
Ω
Signal #2
Select
1k
Ω
+
1
µ
F10nF
+
B
ON
A
ON
Figure 6. Multiplexed Output