Samsung KA2141 Datasheet

APRIL. 1998

DATA SHEET

KA2141

R/G/B VIDEO AMPLIFIER FOR MONITORS KA2141

R/G/B VIDEO AMPLIFIER

The KA2141 is a very high frequency Video amplifier system
to be used in Monitor. It contains 3 matched R/G/B video
amplifiers with blank signal and clamp gate pulse and
provides a flexible interfacing to DC controlled adjustment
system

FUNCTIONS

• R/G/B Video Amplifier

• Contrast/SUB contrast control

• Brightness control

• Blank gate/Clamp gate

• Video clamp

FEATURES

20-DIP-300A

ORDERING INFORMATION

Device Package Operating Temperature

KA2141 20-DIP-300 -25 °C ~ +70 °C

• 3 - channel R/G/B Video Amplifier: 85MHz bandwidth.

• DC contrast control range: -38dB (0V ~ 4V)

• DC sub contrast control range: -11dB (0V ~ 4V)

• Maximum Video output level: 7Vpp

• DC Brightness control range: 0V ~ 4V

• Include blank gate and clamp gate signal processing block

1

KA2141 R/G/B VIDEO AMPLIFIER FOR MONITORS

BLOCK DIAGRAM

ONE (RED)
OF THREE CHANNELS

BDRIVE

GDRIVE

RDRIVE

RIN

VCC1

GIN

GND1

BIN

CONST

1

2

3

2.4V
_

A1

+

4

5

6

VIDEO

CONTRAST

VIDEO

CONTRAST

CONTROL

VIDEO

SUB_CONTRAST

VIDEO

SUB_CONTRAST

CONTROL

+

A2

_

_

gm

+

-A3

-A4

7

8

CONTRAST

CONTROL

CLAMP

GATE

BLANK

GATE

9

20

19

18

17

16

15

14

13

12

BRIGHT

ROUT

RCLP

GOUT

VCC2

GCLP

GND2

BOUT

BCLP

CLP

10

2

11

BLK

R/G/B VIDEO AMPLIFIER FOR MONITORS KA2141

PIN CONFIGURATIONS

Table 1. Pin Configurations

Pin No Symbol I/O Configurations

1 BDRIVE I Blue Gain Control
2 GDRIVE I Green Gain Control
3 RDRIVE I Red Gain Control
4 RIN I Red Video Input
5 V

CC1

- V

CC1

= 12V

6 GIN I Green Video Input
7 GND1 - Ground1
8 BIN I Blue Video Input

9 CONST I Contrast Control Input
10 CLP I Clamp Gate Pulse Input
11 BLK I Blank Gate Pulse Input
12 BCLP - Blue Clamp Capacitor
13 BOUT O Blue Video Output
14 GND2 - Ground2
15 GCLP - Green Clamp Capacitor
16 V

CC2

- V

CC2

= 12V

17 GOUT O Green Video Output
18 RCLP - Red Clamp Capacitor
19 ROUT O Red Video Output
20 BRIGHT I Brightness Control Input

3

KA2141 R/G/B VIDEO AMPLIFIER FOR MONITORS

PIN DESCRITION

Table 2. Pin Description

Pin No Pin Name Schematic Description

4
6
8

9
1
2
3

5

17

Red Video Input

(RIN)

Green Video input

(GIN)

Blue Video Input

(BIN)

Video Contrast

(CONST)

Blue Drive

(BDRIVE)

Green Drive

(GDRIVE)

Red Drive
(RDRIVE)

V

CC1

V

CC2

VCC

Max input video signal is 0.7Vpp

2.4V Bias

Video maximum contrast control
range (0V ~ 4V) is -38dB
Sub contrast control range
(0V ~ 4V) is -11dB

PIN 9

- Supply voltage

7

14

GND1
GND2

10 Clamp Gate Input

(CLP)

PIN 10

4

- Ground

Video amp actives when clamp
gate signal is in low TTL level