參數(shù)資料
型號： STV9555
廠商： 意法半導(dǎo)體
元件分類： 運動控制電子
英文描述： 9.5 ns TRIPLE-CHANNEL HIGH VOLTAGE VIDEO AMPLIFIER
中文描述： 9.5納秒三通道視頻放大器高壓
文件頁數(shù)： 12/24頁
文件大?。?/td> 698K
代理商： STV9555
STV9555
12/24
10V Brightness (C) adjusted by the G1 anode:
V
DD
= A + B + D + E
V
DD
= 15V + 25V + 40V + 17V = 97V
10
APPLICATION HINTS
10.1 How to choose the high supply voltage value (V
DD
) in DC coupling mode
The V
DD
high supply voltage must be chosen carefully. It must be high enough to provide the necessary
video adjustment but set to minimum value to avoid unecessary power dissipation.
Example
(see
Figure 2
):
The following example shows how the optimum V
DD
voltage value is determined:
– Cut-off adjustment range (B) : 25V
– Max contrast (D) : 40V
Case 1:
10V Brightness (C) adjusted by the preamplifier :
V
DD
= A + B + C + D + E
V
DD
= 15V + 25V + 10V + 40V + 17V = 107V
Case 2:
10.2 Arcing Protection: schematics
As the amplifier outputs are connected to the CRT cathodes, special attention must be given to protect
them against possible arcing inside the CRT.
Protection must be considered when starting the design of the video CRT board. It should always be
implemented before starting to adjust the dynamic video response of the system.
The arcing network that we recommend (see
Figure 16
) provides efficient protection without deteriorating
the amplifier video performances.
The total resistance between the amplifier and the CRT cathode (R10+R11) protects the device against
overvoltages. We recommend to use R10+R11 > 200
.
Spark gaps are strongly recommended for arcing protection.
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參數(shù)描述
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