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參數資料
| 型號： | LC89057W-VF4A-E |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, SQFP-48 |
| 文件頁數： | 16/16頁 |
| 文件大?。?/td> | 328K |
| 代理商： | LC89057W-VF4A-E |
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
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LC89057W-VF4A-TBM-E | 制造商:ON Semiconductor 功能描述: 制造商:ON Semiconductor 功能描述:AUDIO I/F RECEIVER |
| LC89058W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:CMOS IC Digital Audio Interface Receiver |
| LC89058WA-E | 功能描述:音頻發送器、接收器、收發器 RoHS:否 制造商:Cirrus Logic 工作電源電壓:3.3 V, 5 V 電源電流:11.8 mA 通道數量:1 最大工作溫度:+ 70 C 接口類型:I2C, SPI 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-28 封裝: |
| LC89058W-E | 功能描述:音頻 DSP AUDIO INTERFACE RECEIVER RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| LC8905V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Digital Audio Interface Receiver |
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