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TW2866C Datasheet(PDF) 12 Page - Renesas Technology Corp |
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TW2866C Datasheet(HTML) 12 Page - Renesas Technology Corp |
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12 / 143 page ![]() TW2866C FN8253 Rev. 0.00 Page 12 of 143 February 3, 2012 DECIMATION FILTER The digitized composite video data are over-sampled to simplify the design of analog filter. The decimation filter is required to achieve optimum performance and prevent high frequency components from being aliased back into the video image when down-sampled. Figure 2 shows the characteristic of the decimation filter. FIGURE 2. THE CHARACTERISTIC OF THE DECIMATION FILTER 0 2 4 6 8 10 12 x 10 6 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 Frequency (Hertz) |
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