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| 型號(hào)： | 9402AVK |
| 廠商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | 14 X 14 MM, 2 MM HEIGHT, PLASTIC, MS-022, MQFP-80 |
| 文件頁(yè)數(shù)： | 24/126頁(yè) |
| 文件大?。?/td> | 1673K |
| 代理商： | 9402AVK |
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DATA SHEET
12
Aug. 16, 2004; 6251-552-1DS
Micronas
2.1.6. Luminance Processing
A luminance notch filter is implemented to separate
the chroma information from the luminance. Depend-
ing on the color standard, one out of three different
notch
characteristics
is
chosen
(‘PAL’,
‘NTSC’,
‘SECAM’) automatically.
For PAL and Secam the respective notch filters have 5
different characteristics each. The luminance notch fil-
ter for NTSC can be set to 4 different filter response
curves. They can be selected by NTCHSEL. Alterna-
tively, no notch should be used for Y/C input
(NOTCHOFF). The filter characteristics can be found
in Figure 2–8. In SECAM operation, the notch filter can
be fixed to one frequency or toggle between 4.4 MHz
and 4.25 MHz depending on the transmitted color (Dr,
Db) (SECNTCH).
A simple lowpass-filter can be enabled by LPPOST to
further reduce high-frequency noise component from
the CVBS signal.
Fig. 2–8: Filter Characteristics for NTSC, PAL M and
PAL N
Fig. 2–9: Filter Characteristics for PAL B/G, NTSC44,
PAL60
Fig. 2–10: Filter Characteristics for SECAM
(SECNTCH=’01’, 4.25 MHz)
Fig. 2–11: Filter Characteristics for Y/C mode.
The black level can be shifted by the parameter
LMOFST. This is required to compensate 7.5 IRE off-
sets in some input signals (e.g. NTSC) The positive or
negative offset is added to the Y signal before scaling.
Fig. 2–12: Adjustment of ‘Black’ to ‘Blankingvalue’ at
Analog Output.
3.58
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
30
25
20
15
10
5
0
5
characteristic for NTSC
frequency [MHz]
attenuation
[dB]
’x00’
NTCHSEL=
’x01’
’x10’
’x11’
4.43
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
30
25
20
15
10
5
0
5
characteristic for PAL
frequency [MHz]
attenuation
[dB
]
NTCHSEL=
’000’
’100’
’010’
’011’
’001’
4.25
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
30
25
20
15
10
5
0
5
characteristic for SECAM (4.25 MHz)
frequency [MHz]
atte
nua
tion
[
dB]
NTCHSEL=
’000’
’100’
’010’
’011’
’001’
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
30
25
20
15
10
5
0
5
characteristic for Y/C
frequency [MHz]
atte
nua
tion
[
dB]
LPPOST=1
LPPOST=0
LMOFST='01'
LMOFST='11'
LMOFST='00'
LMOFST='10'
BLANKING BLACK
LMOFST='01'
LMOFST='11'
LMOFST='00'
LMOFST='10'
BLANKING
BLACK
Input signals without 7.5IRE offset
Input signals with 7.5IRE offset
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 9402F | 制造商:HH SMITH 功能描述:HARDWARE |
| 9402H | 制造商:Abbatron/HH Smith 功能描述: |
| 9402L | 制造商:Abbatron/HH Smith 功能描述: |
| 9402M | 制造商:Abbatron/HH Smith 功能描述: |
| 940-2MM | 功能描述:支架與墊片 Plastic Spcr 2mm Nylon White RoHS:否 制造商:Schurter 類型:Transipillar Spacers 長(zhǎng)度:16 m 螺紋大小:M4 外徑:10 mm 材料:Nylon with Steel 電鍍:Zinc |
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