參數(shù)資料
型號: THS8200PFPG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: GREEN, PLASTIC, HTQFP-80
文件頁數(shù): 23/101頁
文件大小: 806K
代理商: THS8200PFPG4
4–13
2.75
1+
δ
Frequency (MHz)
1
3.375
1–
δ
–6 dB
–40 dB
4.0
Magnitude
NOTE:
δ = 0.05 dB
Figure 4–11. Cb and Cr Filter Requirements Based on ITU-R.BT601
Figure 4–12 through Figure 4–14 illustrate the frequency and phase responses of the interpolating filters. The actual
response using the finite-word length coefficients present in THS8200 is shown. The same filter characteristic is used
for SDTV/HDTV modes and for both 4:2:2 to 4:4:4 interpolation (2 filters, one on each of Cb and Cr channels, switched
in when a 4:2:2 input mode is selected on DMAN to interpolate chrominance from 1/2 to 1
× pixel clock rate) as well
as for 2
× video oversampling (3 filters, one on each DAC channel, switched in when 2× interpolation is activated).
f – Frequency – Rad
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Magnitude
dB
MAGNITUDE
vs
FREQUENCY
f – Frequency – Rad
0
1
2
3
4
5
6
7
8
9
10
0.00
0.25
0.50
0.75
1.00
1.25
1.50
Magnitude
dB
MAGNITUDE
vs
FREQUENCY
0.01
0.008
0.006
0.004
0.002
0
–0.002
–0.004
–0.006
–0.008
–0.01
Figure 4–12. IFIR Frequency Response
Figure 4–13. IFIR Pass-Band Frequency Response
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