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參數(shù)資料
| 型號： | UPD6464ACS |
| 廠商： | NEC Corp. |
| 英文描述： | ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR |
| 中文描述： | 屏幕字符顯示的CMOS大規(guī)模集成電路的12線，24柱甲板型錄像機(jī) |
| 文件頁數(shù)： | 31/52頁 |
| 文件大小： | 570K |
| 代理商： | UPD6464ACS |
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μ
PD6464A,6465
31
When V
S
is small, it is suited for horizontal sync. separation, but is against to vertical sync. separation. And
when V
S
is large, edge noise of horizontal sync. separation causes a synchronization error (jitter). Therefore,
the constant of each element in the circuit should be optimized according to input signal’s characteristics.
The C2 capacitance should be specified as a sufficient larger value compared to charge/discharge current.
If the value overly exceeds the suitable value, however, excessive response characteristics will be inferior,
falling to trace rapid average-picture-level (APL) fluctuation of input signal. In the circuit shown in Figure 5-1
(a), a capacitor is connected to the composite video signal input portion for measurement. However, this makes
it hard to trace APL fluctuation. Therefore, in designing an actual circuit, insert a sync-chip clamp in front of
Q1 in Figure 5-1 (a). to stabilizes the potential of a synchronization signal, for tracing APL fluctuation.
Caution
In the circuit of Figure 5-1 (a), the width of the Hsync synchronization signal that is included in
the composite synchronization signal after separation may be wider than that of the Hsync
synchronization signal that is included in the input video signal, because of its circuit configuration.
Therefore, the width of the Hsync synchronization signal during a command continuous input
enable time (refer to 3.5 BUSY Period for Command Input) should be the same as that of the Hsync
synchronization signal included in Csync after separation in the circuit of Figure 5-1 (a).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD6464AGT | 制造商:NEC 制造商全稱:NEC 功能描述:ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR |
| UPD6464AGT101A | 制造商:Renesas Electronics 功能描述:VCR 5V Cut Tape |
| UPD6465 | 制造商:NEC 制造商全稱:NEC 功能描述:ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR |
| UPD6465CS | 制造商:NEC 制造商全稱:NEC 功能描述:ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR |
| UPD6465GT | 制造商:NEC 制造商全稱:NEC 功能描述:ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR |
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