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參數(shù)資料
| 型號(hào)： | LA7975 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | PAL SIF Converter Circuit for TV and VCR Multi-system(用于電視機(jī)/VCR系統(tǒng)的PAL SIF轉(zhuǎn)換器芯片（將5.5 MHz,6 MHz,和6.5 MHz的PAL SIF信號(hào) 轉(zhuǎn)換為6 MHz的信號(hào).) |
| 中文描述： | PAL制式轉(zhuǎn)換電路的應(yīng)力強(qiáng)度因子的電視和錄像機(jī)多系統(tǒng)（用于電視機(jī)/錄像機(jī)系統(tǒng)的PAL制式轉(zhuǎn)換器芯片應(yīng)力強(qiáng)度因子（將5.5兆赫，6兆赫，650兆赫和應(yīng)力強(qiáng)度因子的PAL制式信號(hào)轉(zhuǎn)換為6兆赫的信號(hào)。） |
| 文件頁(yè)數(shù)： | 4/6頁(yè) |
| 文件大?。?/td> | 100K |
| 代理商： | LA7975 |
.
Pin 1 is the SIF input pin.
The filter in Figure 2 can be connected to the input section
to improve the buzz characteristic.
Figure 3 shows the characteristics for the filter in Figure 2.
If C1 is too small, the buzz characteristic improves for
normal input, but the filter cuts into the sound carrier and the
buzz characteristic deteriorates for the P/S (picture/sound
carrier) ratio.
Use C1
6
20 pF to 47 pF.
.
Pin 4 is the ceramic oscillator pin.
To make the oscillation waveform approach a sine wave,the
oscillation level is controlled internally.
Oscillation levels of 15 to 80 mVp-p at Pin 4 give the
waveform shown in Figure 5.
To stop oscillation, attach an external resistor as in Figure 6
and switch S1 on.
Here are the conditions for handling multiple systems.
Input frequency
5.5 MHz
6.0 MHz
Oscillator
500 kHz
Oscillation stop
Pin 5 output
6 MHz
6 MHz
(pass through)
6 MHz
6 MHz
6.5 MHz
4.5 MHz
500 kHz
1.5 MHz
Figure 7
Figure 8 shows a proposed multi-system
Unit (resistance:
, capacitance: F)
Figure 1
From video
output section
Figure 2
Unit (resistance:
)
Figure 4
Figure 5
(Pin 4 oscillation waveform)
Figure 6
Unit (resistance:
)
Filter characteristic
A
Unit (resistance:
, capacitance: F)
Frequency – Hz
Figure 3
(Multi-system implementation)
Figure 8
Unit (resistance:
)
LA7975
No.3994-4/6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA7976 | PAL SIF Converter Circuit for TV and VCR Multi-system |
| LA7990 | LA7990 |
| LA7995M | Charge Pump Type DC-DC Converter |
| LA8049 | MONOLITHIC LOG/ANTILOG AMPLIFIER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA7976 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PAL SIF Converter Circuit for TV and VCR Multi-system |
| LA7990 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LA7990 |
| LA7995M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Charge Pump Type DC-DC Converter |
| LA79B-1-3G.H-S2-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA79B-1-4DBK-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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