Motorola DSP56156 Manual page 128

ON-CHIP CODEC FREQUENCY RESPONSE AND GAIN ANALYSIS
20
L
0
o
g
-20
M
a
-40
g
n
-60
i
t
-80
u
d
e -100
(
-120
d
B
-140
)
-160
0.001
20
L
0
o
g
-20
M
a
-40
g
n
-60
i
t
-80
u
d
e -100
(
-120
d
B
-140
)
-160
0.001
Figure 6-4 Log Magnitude Frequency Response of the
MOTOROLA
200 400
2 4 6
A/D Comb Filter for F=2.048 MHz and D=128
DSP56156 ON-CHIP SIGMA/DELTA CODEC
600
Frequency (KHz)
8 10
Frequency (KHz)
Cascade of:
sum3-128.Filter
diff3-128.Filter
800 1024
Cascade of:
sum3-128.Filter
diff3-128.Filter
12 14 16
6 - 13