參數(shù)資料
型號: TVP5147M1PFPR
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: GREEN, PLASTIC, HTQFP-80
文件頁數(shù): 22/108頁
文件大?。?/td> 937K
代理商: TVP5147M1PFPR
f Frequency MHz
70
60
50
40
30
20
10
0
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
ITU-R BT.601 3 dB
at 1.42 MHz
Amplitude
dB
f Frequency MHz
70
60
50
40
30
20
10
0
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Amplitude
dB
Filter 3
3 dB at 554 kHz
Filter 2
3 dB at 844 kHz
Filter 1
3 dB
at 1.03 MHz
Filter 0
3 dB at 1.41 MHz
SLES140F – JULY 2005 – REVISED DECEMBER 2010
www.ti.com
2.2.2.1
Color Low-Pass Filter
High filter bandwidth preserves sharp color transitions and produces crisp color boundaries. However, for
nonstandard video sources that have asymmetrical U and V side bands, it is desirable to limit the filter
bandwidth to avoid UV crosstalk. The color low-pass filter bandwidth is programmable to enable one of the
three notch filters. Figure 2-4 and Figure 2-5 represent the frequency responses of the wideband color
low-pass filters.
Figure 2-4. Color Low-Pass Filter Frequency
Figure 2-5. Color Low-Pass Filter With Filter
Response
Characteristics, NTSC/PAL ITU-R BT.601 Sampling
20
Functional Description
Copyright 2005–2010, Texas Instruments Incorporated
Product Folder Link(s): TVP5147M1
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