- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358737 > LA7555 (Sanyo Electric Co.,Ltd.) IF Signal Processing (VIF+SIF) Circuit for TV / VCR Use(用于電視機/VCR應用的IF信號處理（VIF+SIF）電路) PDF資料下載
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/VCR應用的IF信號處理（VIF+SIF）電路) |
| 中文描述： | 中頻信號處理（資料表格應力強度因子）電路電視/錄像機使用（用于電視機/錄像機應用的中頻信號處理（資料表格強度因子）電路） |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 187K |
| 代理商： | LA7555 |
LA7555
No.2927–5/11
2. Video detector
As shown in Fig.2-1, the video detector is a PLL-type. AM detection (video detection) is by phase shifting the IF
signal and VCO output signal 180
°
and multiplying the input signal. It offers excellent buzz and beat characteris-
tics as detection is by multiplication by a clean signal. Also, excellent detection characteristics are obtained in the
same manner for the overmodulation signal.
Fig.2-1
3. Video amplifier B/W noise canceller
As shown in Fig.3-1, the video amplifier amplifies the detection output voltage over a wide band to the desired
voltage (=2.2Vp-p). The amplified video signal passes through the B/W noise canceller and is output to pin 21.
White : The noise canceller operates as shown in Fig.3-3 as the input of noise exceeding the white level of the
video signal as shown in Fig.3-2 will cause noticeable noise on the screen.
Black : The noise canceller operates as shown in Fig.3-3 as the input of noise exceeding the sync signal tip as
shown in Fig.3-2 will prevent proper operation of the next-stage sync separation circuit.
Fig.3-2
Fig.3-3
Fig.3-1
相關PDF資料 |
PDF描述 |
|---|---|
| LA75600VA | Monolithic Linear IC IF Signal Processing (VIF/SIF) IC for use in TV/VCR Applications |
| LA7565B | IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products(用于PAL/NTSC多系統(tǒng)音頻電視機和VCR產(chǎn)品的IF信號處理芯片) |
| LA7565KM | IF Signal-Processing IC for PAL/NTSC Multi-System Audio TV and VCR Products |
| LA7566 | VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL and NTSC Multisound Support |
| LA75675M-S | VIF/SIF IF Signal-Processing Circuit that Supports NTSC Intercarrier for TV and VCR Products |
相關代理商/技術參數(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: |
發(fā)布緊急采購，3分鐘左右您將得到回復。