SAA7118 Datasheet, PDF (54/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Philips Semiconductors
Multistandard video decoder with adaptive
comb filter and component video input
Preliminary specification
SAA7118
6
V3
(dB)
0
−3
−6
−9
− 12
− 15
− 18
− 21
− 24
− 27
− 30
− 33
XC2_1 = 0; Zero’s at
f = n × _{X----A----C----1-L-----+}-----1-
with XACL = (1), (2), (3), (4) or
(5)
− 36
− 39
− 42
0
(5)
(4)
(3)
(2)
MHB545
(1)
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
f_sig / f_clock
Fig.33 Examples for prescaler filter characteristics: effect of increasing XACL[5:0].
6
V3
(dB)
0
−3
−6
−9
− 12
− 15
− 18
− 21
− 24
− 27
− 30
(1) XC2_1 = 0 and XACL[5:0] = 1.
(2) XC2_1 = 1 and XACL[5:0] = 2.
(3) XC2_1 = 0 and XACL[5:0] = 3.
(4) XC2_1 = 1 and XACL[5:0] = 4.
(5) XC2_1 = 0 and XACL[5:0] = 7.
(6) XC2_1 = 1 and XACL[5:0] = 8.
− 33
− 36
− 39
− 42
0
(6) (5)
(1)
(2)
(4)
(3)
3 dB at 0.25
6 dB at 0.33
MHB546
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
f_sig / f_clock
Fig.34 Examples for prescaler filter characteristics: setting XC2_1 =1.
2001 May 30
54