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參數(shù)資料
| 型號： | TDA8215B |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 偏轉(zhuǎn) |
| 英文描述： | HORIZ/VERT DEFLECTION IC, PDIP20 |
| 封裝： | DIP-20 |
| 文件頁數(shù)： | 14/15頁 |
| 文件大?。?/td> | 144K |
| 代理商： | TDA8215B |
TDA8215B
8/15
Figure 6. Line Oscillator
The oscillator thresholds are internally fixed by re-
sistors. The discharge of the capacitor depends on
the internal resistor R4. The control voltage is ap-
plied on resistor R5. The sync-pulse drives the
current in the comparator. The line flyback inte-
grated by the external net work gives on pin 13 a
saw tooth, the DC offset of this saw tooth is fixed
by VC. The comparator output provides a positive
current for the part of the signal on pin 13 greater
than to VC and a negative current for the other
part.When the line flyback and the video signal are
synchronized, the output of the comparator is an
alternatively negative and positive current. The
frame sync-pulse inhibits the comparator to pre-
vent frequency drift of the line oscillator on the
frame beginning.
Figure 7. Phase Comparator
V
CC1
11
R5
R4
Phase
comparator
output
V
C
Line
Flyback
Integrated
Flyback
Sinc pulse
Output
Current
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