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PDF SAA4974 Data sheet ( Hoja de datos )
| Número de pieza | SAA4974 | |
| Descripción | Besic without ADC | |
| Fabricantes | Philips | |
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INTEGRATED CIRCUITS
DATA SHEET
SAA4974H
Besic without ADC
Product specification
File under Integrated Circuits, IC02
1998 Apr 21
1 page  
Philips Semiconductors
Besic without ADC
6 PINNING INFORMATION
6.1 Pinning
handbook, full pagewidth
SDA 1
SCL 2
P1.5 3
P1.4 4
P1.3 5
P1.2 6
P1.1 7
VDDD1 8
RST 9
SNRST 10
VDDD2 11
SNDA 12
SNCL 13
VSSD1 14
TMS 15
VSSIO1 16
n.c. 17
VDDIO1 18
n.c. 19
VA 20
VSSD2 21
HA 22
n.c. 23
RSTW 24
SAA4974H
1998 Apr 21
Fig.2 Pin configuration.
5
Product specification
SAA4974H
64 IE2
63 RE
62 UVI4
61 UVI5
60 UVI6
59 UVI7
58 YI0
57 YI1
56 YI2
55 YI3
54 YI4
53 YI5
52 YI6
51 YI7
50 VSSD3
49 TRST
48 VSSIO2
47 SWC
46 VDDIO2
45 n.c.
44 n.c.
43 n.c.
42 n.c.
41 n.c.
MGM688
5 Page 
Philips Semiconductors
Besic without ADC
Product specification
SAA4974H
7.1.3 Y-PEAKING
A linear peaking is applied, which amplifies the luminance
signal in the middle and the upper ranges of the
bandwidth.
The filtering is an addition of:
• The original signal
• The original signal band-passed with centre
frequency = 1⁄4fs
• The original signal high-passed with maximum gain at
frequency = 1⁄2fs.
The band-passed and high-passed signals are weighted
with factors 0, 1⁄8, 1⁄4 and 1⁄2. The impulse response
becomes [−α, −β, 1 + 2α + 2β, −β, −α], where α is the
band-pass weighting factor and β the high-pass weighting
factor.
Coring is added to obtain no gain for low amplitudes in the
(high-pass + band-pass) signal, which is then considered
to be noise. Coring levels can be programmed as 0 (off),
+1/−2, +3/−4 and +7/−8 LSB at 8-bit word.
12
handbook, halfpage
10
IH_PeakingI
(dB)
8
6
4
2
MGE097
(1)
(2)
(3)
(4)
0
0
(1) β = 1⁄2.
(2) β = 1⁄4.
(3) β = 1⁄8.
(4) β = 0.
1/4fs
1/2fs
Fig.7 Peaking transfer function with variation of β
(α = 1⁄8).
12
handbook, halfpage
10
IH_PeakingI
(dB)
8
6
MGE098
(1)
(2)
(3)
(4)
4
2
0
0
1/4fs
1/2fs
(1) β = 1⁄2.
(2) β = 1⁄4.
(3) β = 1⁄8.
(4) β = 0.
Fig.8 Peaking transfer function with variation of β
(α = 1⁄4).
1998 Apr 21
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet SAA4974.PDF ] | |
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