Datasheet

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
TVP5147M1
SLES140G –JULY 2005–REVISED FEBRUARY 2012 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 © 2005–2012, Texas Instruments Incorporated
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