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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)： | 15/15頁 |
| 文件大?。?/td> | 144K |
| 代理商： | TDA8215B |
9/15
TDA8215B
Figure 8.
Line output (Pin 17)
It is an open-collector output. The output negative
pulse time is 22s for a 64s period.
The oscillator thresholds are internally fixed by re-
sistors. The oscillator is synchronized during the
last half free run period. The input current during
the charge of the capacitor is less than 100nA.
Figure 9. Frame Oscillator
Frame output amplifier
This amplifier is able to drive directly the frame
yoke. Its output is short circuit and overload pro-
tected; it contains also a thermal protection.
The frame blanking is detected by the frame fly-
back generator. When the output voltage of the
frame amplifier exceeds VCC2-2VBE, the pulse is
detected. The line flyback detection is provided by
a comparator which compares the input line fly-
back pulse to an internal reference. The burst gate
pulse position is fixed by the external RC network
(Pin 14). It is referenced to the middle of the line
flyback.
This stage will detect the coincidence between the
line sync pulse (if present) and a 2s sampling
pulse. This 2s pulse is positioned at the center of
line sync pulse when the phase loop is locked.
This sampled detection is stored by an external
capacitor Pin 8.
The identification output level is high when video
signal is present.
Important remark: minimum saw-tooth amplitude
on Pin 13 has to be 2VPP (typ.: 2.5VPP).
V
CC1
V
C
12
ST1
SL2
13
V
CC1
To frame amplifier
Frame
sync pulse
2
INPUT CURRENT
COMPENSATION
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