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.

FUNCTIONS

• R. G. B amplifier

• Contrast control

• Clamp & brIghtness circuit

• Vref. circuit

FEATURES

• 3 Channel R.G.B video amplifier (f.

• Superior linearity contrast control

• Black level clamp comparator for

brightness control

• Built-in clamp gate circuit to operate the

clamp comparator at black level

• Vref 2.4V bandgap circuit

BLOCK DIAGRAM

Device

Package Operating Temperature

KA2139

28 DIP

-20

°C ~ +70°C

28-DIP-600A

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

gm

A1

+ -

RED

gm

A1

gm

A1

+ -

+ -

BLUE

GREEN

CONTRAST

CONTROL

Vref

2.4V

A2

A2

A2

1.4

V

ORDERING INFORMATION