參數(shù)資料
型號： TVP5020CPFP
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP80
封裝： POWERPAD, PLASTIC, HTQFP-80
文件頁數(shù)： 13/87頁
文件大?。?/td> 394K
代理商： TVP5020CPFP
2–6
Input Signal
Output Signal
VI
VO
Coring Threshold
t
Figure 2–9. Transfer Curve of Coring Circuit
2.2.3
Chrominance Processing
A quadrature demodulator removes the U and V components from the composite signal in composite video
mode. The U/V signals then pass through the gain control stage for chroma saturation adjustment. The U
and V components pass through a comb filter to eliminate cross-chrominance noise. Phase shifting the
digitally-controlled oscillator controls hue. The block includes an automatic color killer (ACK) circuit that
suppresses the chroma output when the color burst of the video signal is weak or not present.
2.2.4
Clock Circuits
An internal line-locked PLL generates the system and pixel clocks. Figure 2–10 shows a simplified clock
circuit diagram. The digital control oscillator (DCO) generates the reference signal for the horizontal PLL.
The DCO outputs a signal that is fed to the D/A converter. The D/A converter outputs a line-locked clock
signal (LCLK). The DCO requires a 26.8 or a 24.576 MHz clock as an input. The input for the DCO may be
connected to terminal XTAL1 or a 26.8 or 24.576 MHz crystal may be connected across terminals XTAL1
and XTAL2. Figure 2–11 shows the various reference clock configurations.
Lowpass Filter
Sync Detector
Phase
Detector
Loop
Filter
Line-Locked
Clock
PLL
Digital
Control
Oscillator
Crystal
Clock
Generator
DAC
Clock
Generator
Circuit
SCLK
PCLK
XTL1
XTL2
Digitized
Video
Figure 2–10. Clock Circuit Diagram
相關(guān)PDF資料
PDF描述
TVP5020 COLOR SIGNAL DECODER, PQFP80
TVP5022 COLOR SIGNAL DECODER, PQFP80
TVP5031PFP COLOR SIGNAL DECODER, PQFP80
TVP5040CPFP COLOR SIGNAL DECODER, PQFP80
TVP5040PFP COLOR SIGNAL DECODER, PQFP80
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP5020PFC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
TVP5020TQFP 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL VIDEO DECODER
TVP5021PFP 功能描述:視頻 IC NTSC/PAL DIGITAL VIDEO DECODER 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
TVP5021PFPG4 功能描述:視頻 IC NTSC/PAL DIGITAL VIDEO DECODER 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
TVP5031 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL VIDEO DECODER
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