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參數(shù)資料
| 型號： | LA7555 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | IF Signal Processing (VIF+SIF) Circuit for TV / VCR Use(用于電視機(jī)/VCR應(yīng)用的IF信號處理（VIF+SIF）電路) |
| 中文描述： | 中頻信號處理（資料表格應(yīng)力強(qiáng)度因子）電路電視/錄像機(jī)使用（用于電視機(jī)/錄像機(jī)應(yīng)用的中頻信號處理（資料表格強(qiáng)度因子）電路） |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 187K |
| 代理商： | LA7555 |
LA7555
No.2927–9/11
Measurement of VIF selectivity characteristics
The pull-in range of the PLL-type VIF IC is approximately
±
2MHz. Thus, it is not possible to measure the match-
ing characteristics of the tuner SAW filter easily as with the dummy syncronization detection method. The follow-
ing is just one example of how to measure the selectivity characteristics for a single signal.
Test Circuit
Conditions
1. Apply voltage to the IF AGC (pin 13) and adjust until the video output A is 0.5Vp-p.
2. Atteach a 4.7
μ
F capacitor to the APC filter (pin 20) so that the PLL is unlocked.
3. The waveform shown in the diagram below can be monitored through the externally mounted detector.
Note : Error will occur in the measurement of the selectivity characteristics if the video frequency changes between
A and C (by a video equalizer, etc.)
Externally Mounted Detector (Example)
(1)
(2) Voltage doubler type
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA75600VA | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC IF Signal Processing (VIF/SIF) IC for use in TV/VCR Applications |
| LA7565B | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products |
| LA7565BM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products |
| LA7565E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products(292.33 k) |
| LA7565GM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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