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參數(shù)資料
| 型號(hào)： | TVP5040CPFP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 顏色信號(hào)轉(zhuǎn)換 |
| 英文描述： | COLOR SIGNAL DECODER, PQFP80 |
| 封裝： | POWER, PLASTIC, TQFP-80 |
| 文件頁(yè)數(shù)： | 29/109頁(yè) |
| 文件大?。?/td> | 568K |
| 代理商： | TVP5040CPFP |
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2–10
f – Frequency – MHz
–1
0
1
2
3
4
5
6
7
01234567
Gain = 0
Gain = 2
f = 2.89 MHz
Gain = 0.5
Gain = 1
Amplitude
–
dB
Figure 2–18. Peaking Filter Response, PAL Square Pixel
2.2.5
Chrominance Processing
A quadrature demodulator extracts U and V components from the composite signal. The U/V signals then pass
through the gain control stage for chroma saturation adjustment. A comb filter is applied to both U and V to eliminate
cross-chrominance noise. Hue control is achieved with phase shift of the digitally controlled oscillator. An automatic
color killer (ACK) circuit is also included in this block. The ACK will suppress the chroma processing when the color
burst of the video signal is weak or not present.
2.2.6
Clock Circuits
An internal line-locked PLL generates the system and pixel clocks. Figure 2–19 shows a simplified clock circuit
diagram. The digital control oscillator (DCO) generates the reference signal for the horizontal PLL. A 14.318-MHz
clock is required to drive the DCO. This may be input to the TVP5040 at TTL level on the XTAL1 terminal, or a crystal
of 14.318 MHz fundamental resonant frequency may be connected across terminals XTAL1 and XTAL2. Figure 2–20
shows the reference clock configurations. For the example crystal circuit shown in Figure 2–20 (a parallel-resonant
crystal with 14.31818 MHz fundamental frequency), the external capacitors must have the following relationship:
CL1 = CL2 = 2CL – C(stray)
where C(stray) is the terminal capacitance with respect to ground. Note that with the crystal oscillator, an external
4.53-K
resistor is required across XTAL1 and XTAL2 terminals.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TVP5040CPFPG4 | 功能描述:IC NTSC/PAL VIDEO DECODER 80TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| TVP5040EVM | 制造商:Texas Instruments 功能描述:EVAL BD TVP5040EVM USER S GUIDE - Bulk |
| TVP5145 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NTSC/PAL/SECAM/Component Digital Video Decoder With Macrovision(TM) Detection |
| TVP5145EVM | 制造商:Texas Instruments 功能描述:TVP5145EVM - Bulk |
| TVP5145PFP | 功能描述:視頻 IC NTSC/PAL/SECAM/ Comp Dig Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
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