Motorola DSP56156 Manual page 144

ON-CHIP CODEC FREQUENCY RESPONSE AND GAIN ANALYSIS
20
L
o
0
g
M
a
-20
g
n
i
-40
t
u
d
e -60
(
d
-80
B
)
-100
0.001
2
L
0
o
g
-2
M
a
-4
g
n
-6
i
t
-8
u
d
e -10
(
-12
d
B
-14
)
-16
0.001
Figure 6-14 IIR Interpolation and D/A Section Log Magnitude
Frequency Response for F=2.048 MHz and D=128
MOTOROLA
1 2 3
0.5 1 1.5
DSP56156 ON-CHIP SIGMA/DELTA CODEC
IIR Interpolation Filter Response
D/A Section Filter Response
D/A Final Filter Response
4 5
Frequency (KHz)
IIR Interpolation Filter Response
D/A Section Filter Response
D/A Final Filter Response
2 2.5
Frequency (KHz)
6 7 8
3 3.5 4
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