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SAF7118 View Datasheet(PDF) - Philips Electronics

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SAF7118 Datasheet PDF : 173 Pages
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Philips Semiconductors
Multistandard video decoder with adaptive
comb lter and component video input
Product specication
SAF7118
8 FUNCTIONAL DESCRIPTION
8.1 Decoder
8.1.1 ANALOG INPUT PROCESSING
The SAF7118 offers sixteen analog signal inputs, four
analog main channels with source switch, clamp circuit,
analog amplifier, anti-alias filter and video 9-bit CMOS
ADC with a Decimation Filter (DF); see Figs 5 and 8.
The anti-alias filters are adapted to the line-locked clock
frequency via a filter control circuit. The characteristic is
shown in Fig.4. During the vertical blanking period gain
and clamping control are frozen.
6
V
(dB)
0
6
12
18
24
30
36
42
0
2
4
MGD138
6
8
10
12
14
f (MHz)
Fig.4 Anti-alias filter.
2004 Jul 22
18
 

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