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LM1203
RGB Video Amplifier System
TL/H/9178
LM1203
RGB
Video
Amplifier
System
January 1996
LM1203 RGB Video Amplifier System
General Description
The LM1203isa wideband video amplifier system intended
for high resolution RGB color monitor applications.In addi-
tionto three matched video amplifiers,the LM1203 contains
three gated differential input black level clamp comparators
for brightness controland three matched attenuator circuits
forcontrast control. Eachvideo amplifier containsa gainset ‘‘Drive’’ nodefor setting maximum system gain(Ave410)aswellas providingtrim capability.The LM1203 also
containsa voltage referenceforthe video inputs.For high
resolution monochrome monitor applications see the
LM1201 Video Amplifier System datasheet.
Features Three wideband video amplifiers(70 MHz@ b3dB) Inherently matched (g0.1dBor 1.2%) attenuatorsfor
contrast control Three externally gated comparatorsfor brightness con-
trol Provisionsfor independent gain control (Drive)of each
video amplifier Video input voltage reference Low impedance output driver
Block and Connection Diagram
TL/H/9178–1
FIGURE1
Order Number LM1203N
SeeNS Package NumberNA28F
C1996National SemiconductorCorporation RRD-B30M56/Printed inU.S.A.
