參數(shù)資料
型號: TSH341ILT
廠商: STMICROELECTRONICS
元件分類: 音頻/視頻放大
英文描述: 1 CHANNEL, VIDEO AMPLIFIER, PDSO5
封裝: PLASTIC, SOT-23, 5 PIN
文件頁數(shù): 2/13頁
文件大小: 362K
代理商: TSH341ILT
TSH341
Using the TSH341 to Drive Video Signals
10/13
5 Using the TSH341 to Drive Video Signals
Figure 25. Implementation of the video driver on output video DACs
Synchronization Tip
0 IRE
Black Level
Image Content
30 IRE
White Level
100 IRE
1Vp-p
300mV
0V
150mV
Synchronization Tip
0 IRE
Black Level
Image Content
30 IRE
White Level
100 IRE
1Vp-p
300mV
0V
150mV
VOL(50MHz) = 150mV (Figure 8)
To drive the video signal properly, the output of the driver must be at least equal to
250mV (assuming Vio and VOL variations).
1st solution:
Set the video DAC 0-IRE output level to 125mV.
2nd solution:
Implementation of a DC component in the input of the driver.
33uF
1.125V
125mV
time
Volt
75
75
Cable
75
1Vpp
2Vpp
1Vpp
Video
DAC
2.250V
time
Volt
LPF
Reconstruction
Filtering
250mV
1k
DC component
=125mV
Video
Signal
Video
Signal
+5V
+
_
Rfb
Rg
33uF
1.125V
125mV
time
Volt
1.125V
125mV
time
1.125V
125mV
time
Volt
75
75
Cable
75
1Vpp
2Vpp
1Vpp
Video
DAC
2.250V
time
Volt
LPF
Reconstruction
Filtering
250mV
1k
DC component
=125mV
Video
Signal
Video
Signal
+5V
+
_
Rfb
Rg
+5V
1.125V
125mV
time
Volt
75
75
Cable
75
1Vpp
2Vpp
1Vpp
Video
DAC
2.250V
time
Volt
LPF
Reconstruction
Filtering
250mV
Video
Signal
Video
Signal
+
_
Rfb
Rg
+5V
1.125V
125mV
time
Volt
1.125V
125mV
time
1.125V
125mV
time
Volt
75
75
Cable
75
1Vpp
2Vpp
1Vpp
Video
DAC
2.250V
time
Volt
LPF
Reconstruction
Filtering
250mV
Video
Signal
Video
Signal
+
_
Rfb
Rg
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