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參數(shù)資料
| 型號(hào)： | M52036SP |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | SYNC SIGNAL PROCESSOR |
| 中文描述： | 同步信號(hào)處理器 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 254K |
| 代理商： | M52036SP |
M52036SP
Rev.1.0, Sep.22.2003, page 10 of 13
Fig. D shows an example of the measures for improving the allowable duty ratio in a range of 1.4 Vp-p or over of
the input signal.
For use in a range outside the specified value, confirm that the waveform complies with Fig. E when measured it
after removing the filters in pins [7] and [9].
3) Polarity detection and empty input detection (pins [7] and [9])
A capacitor is required to be installed external as a filter for polarity detection and empty input detection. The large
the capacitance, the smaller the ripple and reduces malfunction. However, the detecting time is lengthened.
For an input of 15 kHz, a capacitor of 0.05
F or larger is recommended. For 60 Hz, a 10 F or larger is sufficient.
If it is necessary to use a capacitor of smaller capacitance, measure the waveform at the filter terminal under the
condition of the lowest frequency of the input sync signal to be used and the smallest duty ratio. And make sure
that the signal shows 7.5 V (actually 6.6 V) or over for positive polarity input or 4.5 V (actually 5.5 V) or lower for
a negative polarity input.
4) VERT S/S IN (pins [11])
For V sync separation, signals are generated by externally integrating composite sync signals, and are then input.
The composite sync signals that are input to pin [6] (H + V) ore output to pin [14] HD
+. For V sync separation, pin
[14] HD
+ output is externally integrated, and input to pin [11]. Check pin [11] waveform to see if the H element is
adequately low.
In the IC, the sync separation threshold level is set to approximately 1 V when no external adjustment is provided.
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