Motorola DSP56156 Manual page 160

L
10
o
g
0
M
a
-20
g
n
i
t
-40
u
d
e
-60
(
d
B
-80
)
0.001
L
1
o
g
0
M
a -1
g
n
-2
i
t
-3
u
d
e
-4
(
-5
d
B
-6
)
0.001
Figure 6-26 Overall Response of the D/A Section
MOTOROLA
APPLICATION EXAMPLES
1 2 3
0.5 1 1.5
When Using the IIR Filter of Figure 6-25
DSP56156 ON-CHIP SIGMA/DELTA CODEC
4 5
Frequency (kHz)
2 2.5
Frequency (kHz)
Cascade of:
compda125-3.IIR.Filter
diff2-125.Filter
sum2-125.Filter
analogsum3-125.Filter
analogdiff3-125.Filter
analog-lp.Filter
6 7 8
Cascade of:
compda125-3.IIR.Filter
diff2-125.Filter
sum2-125.Filter
analogsum3-125.Filter
analogdiff3-125.Filter
analog-lp.Filter
3 3.5 4
6 - 45