KA2139 Datasheet, PDF (1/6 Pages) Samsung semiconductor – 3 CHANNEL R.G.B VIDEO AMPLIFIER

KA2139
VIDEO AMPLIFIER FOR MONITOR
3 CHANNEL R.G.B VIDEO AMPLIFIER
The KA2l39 is a monolithic integrated circuit for processing
the R,G,B video in high resolution CRT display.
It contains 3 channel video amplifier, black level clamp
comparator for brightness control and DC control attenuator
for contrast control, this device is suitable for monitor.
28-DIP-600A
FUNCTIONS
• R. G. B amplifier
• Contrast control
• Clamp & brIghtness circuit
• Vref. circuit
FEATURES
• 3 Channel R.G.B video amplifier (f._-3DB=7OMHz:Typ)
• Superior linearity contrast control
• Black level clamp comparator for
ORDERING INFORMATION
brightness control
Device Package Operating Temperature
• Built-in clamp gate circuit to operate the
clamp comparator at black level
KA2139 28 DIP
-20°C ~ +70°C
• Vref 2.4V bandgap circuit
BLOCK DIAGRAM
28 27 26 25 24 23 22 21 20 19 18 17 16 15
A2
A2
A2
A1 ^gm
+-
RED
A1 ^gm
+-
GREEN
A1
+-
BLUE
gm
CONTRAST
CONTROL
1.4
Vref
V
2.4V
1 2 3 4 5 6 7 8 9 10 11 12 13 14