Cirrus Logic CS5376A - Manual (Page 46)

CS5376A
DS612F4 46
Filter Type
System Function Filter Coefficients
SINC3 (Stage 1)
SINC3 (Stage 2)
SINC3 (Stage 3)
4
th order decimate by 5
17 coefficients
4
1
5
1
1
) ( ⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
−
=
−
−
z
z
z H
h
0
= 1
h
1
= 4
h
2
= 10
h
3
= 20
h
4
= 35
h
5
= 52
h
6
= 68
h
7
= 80
h
8
= 85
h
9
= 80
h
10
= 68
h
11
= 52
h
12
= 35
h
13
= 20
h
14
= 10
h
15
= 4
h
16
= 1
SINC3 (Stage 4)
5
th order decimate by 2
6 coefficients
5
1
2
1
1
) ( ⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
−
=
−
−
z
z
z H
h
0
= 1
h
1
= 5
h
2
= 10
h
3
= 10
h
4
= 5
h
5
= 1
SINC3 (Stage 5)
6
th order decimate by 2
7 coefficients
6
1
2
1
1
) ( ⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
−
=
−
−
z
z
z H
h
0
= 1
h
1
= 6
h
2
= 15
h
3
= 20
h
4
= 15
h
5
= 6
h
6
= 1
SINC3 (Stage 6)
6
th order decimate by 3
13 coefficients
6
1
3
1
1
) ( ⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
−
=
−
−
z
z
z H
h
0
= 1
h
1
= 6
h
2
= 21
h
3
= 50
h
4
= 90
h
5
= 126
h
6
= 141
h
7
= 126
h
8
= 90
h
9
= 50
h
10
= 21
h
11
= 6
h
12
= 1
Table 11. SINC3 Filter Coefficients