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U2203B Datasheet

RGB Video Amplifier System for Monitors

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RGB Video Amplifier System for Monitors
U2203B
Description
The U2203B-A is a wideband video amplifier IC system
especially designed for use in high-resolution RGB moni-
tors. The IC includes three well matched video
amplifiers, three gated differential amplifiers for black-
level 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
D Independent gain control of each amplifier
D ESD protection according to MIL-STD. 883
Vs1 1
CONTRAST CAP 2
CONTRAST CAP 3
R VIDEO IN 4
SUPPLY
REG.
RED
1k
40
90
28 Vs1
27 R DRIVE
26 R CLAMP (–)
25 R VIDEO OUT
R CLAMP CAP 5
G VIDEO IN 6
GROUND 7
G CLAMP CAP 8
GREEN
1k
90
40
24 R CLAMP (+)
23 Vs2
22 G DRIVE
21 G CLAMP (–)
B VIDEO IN 9
B CLAMP CAP 10
Vin REF 11
CONTRAST 12
2.4V
REF
CONTRAST
CONTROL
Vs1 13
CLAMP GATE 14
1.4V
REF
BLUE
1k
90
40
20 G VIDEO OUT
19 G CLAMP (+)
18 B DRIVE
17 B CLAMP (–)
U2203B
16 B VIDEO OUT
15 B CLAMP (+)
95 10749
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A2, 27-Jan-97
1 (7)
TEMIC Semiconductors
TEMIC Semiconductors



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