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參數(shù)資料
| 型號： | SN761210 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | VIDEO-PROCESSING CIRCUIT |
| 中文描述： | 視頻處理電路 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 178K |
| 代理商： | SN761210 |
SN761210
VIDEO-PROCESSING CIRCUIT
SOCS042 – JUNE 1994
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
aperture-amplifier section
If the aperture function (i.e., edge enhancement) is used, the video signal is connected from AMPOUT through
a resistor to YIN and through a delay line to YDIN. The aperture gain is selected by applying voltage to APGAIN.
The edge-enhanced video signal then is available for further processing at APOUT.
output-amplifier section
If edge enhancement is not used, video should be capacitvely coupled from AMPOUT to YHIN. If edge
enhancement is used, video is capacitively coupled from APOUT to YHIN. Text may be inserted on CHARAIN.
A dark-reference clamp pulse should be applied to CLAMP to restore the video signal. Composite sync is
inserted on CSYNC while composite blank is inserted on CBLK. The black level is determined by applying
voltage to SULVL. The sync level is determined by applying voltage to SYNCLVL. The white-clip level is
determined by applying voltage to HICLPLVL. Composite video is available at VIDEO (see Figure 5 through
Figure 7).
1
1.5
2
0.6
0.1
0
SYNCLVL – V
O
SYNCLVL
vs
PEAK-TO-PEAK OUTPUT VOLTAGE
2.5
0.2
0.3
0.4
0.5
0.7
P
Figure 5
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