Cirrus Logic CS5378 - Manual (Page 55)

CS5378
DS639F3 55
Filter Type System Function Filter Coefficients
(normalized 24-bit)
IIR1 (Coefficient set 0)
1
st order, high pass
Corner at 0.15% f
s
3 coefficients






+
+
=
−
−
1
11
1
11 10
1
) (
z a
z b b
z H
a
11
= -8309916
b
10
= 8349262
b
11
= -8349262
IIR1 (Coefficient set 1)
1
st order, high pass
Corner at 0.30% f
s
3 coefficients






+
+
=
−
−
1
11
1
11 10
1
) (
z a
z b b
z H
a
11
= -8231957
b
10
= 8310282
b
11
= -8310282
IIR1 (Coefficient set 2)
1
st order, high pass
Corner at 0.60% f
s
3 coefficients






+
+
=
−
−
1
11
1
11 10
1
) (
z a
z b b
z H
a
11
= -8078179
b
10
= 8233393
b
11
= -8233393
IIR1 (Coefficient set 3)
1
st order, high pass
Corner at 0.90% f
s
3 coefficients






+
+
=
−
−
1
11
1
11 10
1
) (
z a
z b b
z H
a
11
= -7927166
b
10
= 8157887
b
11
= -8157887
IIR1 (Coefficient set 4)
1
st order, high pass
Corner at 1.20% f
s
3 coefficients






+
+
=
−
−
1
11
1
11 10
1
) (
z a
z b b
z H
a
11
= -7778820
b
10
= 8083714
b
11
= -8083714
Filter Type System Function Filter Coefficients
(normalized 24-bit)
IIR2 (Coefficient set 0)
2
nd order, high pass
Corner at 0.15% f
s
5 coefficients






+ +
+ +
=
− −
− −
1
22
1
21
1
22
1
21 20
1
) (
z a z a
z b z b b
z H
a
21
= -8332704
a
22
= 4138771
b
20
= 4166445
b
21
= -8332890
b
22
= 4166445
IIR2 (Coefficient set 1)
2
nd order, high pass
Corner at 0.30% f
s
5 coefficients






+ +
+ +
=
− −
− −
1
22
1
21
1
22
1
21 20
1
) (
z a z a
z b z b b
z H
a
21
= -8276806
a
22
= 4083972
b
20
= 4138770
b
21
= -8277540
b
22
= 4138770
IIR2 (Coefficient set 2)
2
nd order, high pass
Corner at 0.60% f
s
5 coefficients






+ +
+ +
=
− −
− −
1
22
1
21
1
22
1
21 20
1
) (
z a z a
z b z b b
z H
a
21
= -8165041
a
22
= 3976543
b
20
= 4083972
b
21
= -8167944
b
22
= 4083972
IIR2 (Coefficient set 3)
2
nd Order, high pass
Corner at 0.90% f
s
5 coefficients






+ +
+ +
=
− −
− −
1
22
1
21
1
22
1
21 20
1
) (
z a z a
z b z b b
z H
a
21
= -8053350
a
22
= 3871939
b
20
= 4029898
b
21
= -8059796
b
22
= 4029898
IIR2 (Coefficient set 4)
2
nd order, high pass
Corner at 1.20% f
s
5 coefficients






+ +
+ +
=
− −
− −
1
22
1
21
1
22
1
21 20
1
) (
z a z a
z b z b b
z H
a
21
= -7941764
a
22
= 3770088
b
20
= 3976539
b
21
= -7953078
b
22
= 3976539
Table 17. IIR Filter Coefficients