器件名称: U2203B-A
功能描述: RGB Video Amplifier System for Monitors
文件大小: 106.54KB 共7页
简 介:U2203B
RGB Video Amplifier System for Monitors
Description
The U2203B-A is a wideband video amplifier IC system especially designed for use in high-resolution RGB monitors. The IC includes three well matched video amplifiers, three gated differential amplifiers for blacklevel clamping and brightness control and the function for simultaneously contrast control. Separate adjustment of the maximum gain of each channel is also possible.
Features
D 3 channels, high bandwidth (90 MHz @ –3 dB) D Matched attenuators for contrast control D Black-level clamping for brightness control
Vs1 1 SUPPLY REG. 1k
D Independent gain control of each amplifier D ESD protection according to MIL-STD. 883
28 Vs1
CONTRAST CAP
2
27 R DRIVE
CONTRAST CAP
3
RED
40 90
26 R CLAMP (–)
R VIDEO IN
4
25 R VIDEO OUT
R CLAMP CAP
5
24 R CLAMP (+)
G VIDEO IN
6
GREEN
1k 40
23 Vs2
GROUND
7
90
22 G DRIVE
G CLAMP CAP
8 9
21 G CLAMP (– )
B VIDEO IN B CLAMP CAP
BLUE
1k 40 2.4V REF CONTRAST CONTROL 90
20 G VIDEO OUT
10
19 G CLAMP (+)
Vin REF CONTRAST
11 12
18 B DRIVE
17 B CLAMP (–)
Vs1
13 1.4V REF
U2203B
95 10749
16 B VIDEO OUT
CLAMP GATE
14
15 B CLAMP (+)
Figure 1. Block diagram
TELEFUNKEN Semiconductors Rev. A2, 27-Jan-97
1 (7)
U2203B
Pin Description
VS1 Ccontr Ccontr Vin, R Cclamp, R Vin, G GND Cclamp, G Vin, B Cclamp, B VBias Vcontr VS1 VGate 1 2 3 4 5 6 7 8 9 10 11 12 13 14
96 12388
28 VS1 27 RR 26 VR– 25 Vout, R 24 VR+ 23 VS2 22 RG 21 VG–
20 Vout, G 19 18 17 16 15 V……
