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參數(shù)資料
| 型號(hào)： | LA7555 |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24 |
| 封裝： | SDIP-24 |
| 文件頁數(shù)： | 11/11頁 |
| 文件大?。?/td> | 355K |
| 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
μF 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
相關(guān)PDF資料 |
PDF描述 |
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| LA75600VA | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA75600VA | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA7565BM | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO24 |
| LA7565B | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24 |
| LA7565E | AM/FM, AUDIO/VIDEO DEMODULATOR, PDIP24 |
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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