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LM1207N Datasheet

  • LM1207N

  • 130 MHz/85 MHz RGB Video Amplifier System with Blanking

  • 24頁(yè)

  • NSC

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LM1205 LM1207 130 MHz 85 MHz RGB Video Amplifier System with Blanking
January 1996
LM1205 LM1207
130 MHz 85 MHz RGB Video Amplifier System with
Blanking
General Description
The LM1205 LM1207 is a very high frequency video amplifi-
er system intended for use in high resolution RGB monitor
applications In addition to the three matched video amplifi-
ers the LM1205 LM1207 contains three gated single end-
ed input black level clamp comparators for brightness con-
trol three matched DC controlled attenuators for contrast
control and three DC controlled sub-contrast attenuators
providing gain trim capability for white balance All DC con-
trol inputs offer high input impedance and an operation
range from 0V to 4V for easy interface to bus controlled
alignment systems The LM1205 LM1207 also contains a
blanking circuit which clamps the video output voltage dur-
ing blanking to within 0 1V above ground This feature pro-
vides blanking capability at the cathodes of the CRT A spot
killer is provided for CRT phosphor protection during power-
down
Y
Y
Y
Y
Y
Y
Y
Three externally gated single ended input comparators
for cutoff and brightness control
0V to 4V high input impedance DC contrast control
(
l
40 dB range)
0V to 4V high input impedance DC drive control for
each video amplifier (
b
6 dB to 0 dB range)
Spot killer blanks output when V
CC
k
10 6V
Capable of 7 V
PP
output swing (slight reduction in
bandwidth)
Output stage blanking
Output stage directly drives most hybrid or discrete
CRT drivers
Applications
Y
Y
Y
Y
Features
Y
Y
High resolution RGB CRT monitors
Video AGC amplifiers
Wideband amplifiers with gain and DC offset controls
Interface amplifiers for LCD or CCD systems
Three wideband video amplifiers 130 MHz (LM1205)
b
3 dB (4 V
PP
output)
Matched (
g
0 1 dB or 1 2%) attenuators for contrast
control
Block and Connection Diagram
TL H 11881 鈥?1
FIGURE 1
Order Number LM1205N or LM1207N
See NS Package Number N28B
C
1996 National Semiconductor Corporation
TL H 11881
RRD-B30M66 Printed in U S A

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