8-Pole, 6-Zero
Elliptic, 1.56
Low-Pass
Appendix A
Theoretical Transfer Characteristics
1
Frequency Response
0
-20
-40
-60
-80
-100
f/fc
Amp
(dB)
Phase
(deg)
Delay
(sec)
(Hz)
0.00
0.10
0.20
0.30
0.40
0.00
0.00
-29.7
-59.8
-90.5
-122
0.823
0.829
0.844
0.865
0.904
-0.001
-0.013
-0.040
-0.049
0.50
0.55
0.60
0.65
0.70
-0.018
-0.003
-0.002
-0.019
-0.042
-156
-174
-192
-212
-233
0.972
1.016
1.064
1.116
1.178
2
2
3 4 5 6 7
0.1
3 4 5 6 78 1.0
10.0
Normalized Frequency(f/fc)
0.75
0.80
0.85
0.90
0.95
-0.049
-0.026
-0.001
-0.024
-0.045
-255
-279
-305
-335
-369
1.264
1.388
1.557
1.767
2.111
Delay (Normalized)
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.20
-0.050
-10.48
-25.96
-39.45
-52.87
-69.11
-89.09
-85.32
-89.95
-103.5
-95.94
-89.31
-86.44
-84.96
-84.54
-414
-531
-576
-598
-614
-624
-453
-459
-463
-465
-288
-290
-292
-295
-302
3.062
2.043
0.814
0.493
0.348
0.265
0.211
0.174
0.156
0.147
0.158
0.126
0.117
0.110
0.087
4.0
2.0
0.8
0.0
2
3
4
5 6 7 8 91.0
0.15
1.5
0.1
Normalized Time (1/f sec)
2.40
2.60
2.80
3.00
3.50
4.00
5.00
6.00
7.00
-88.65
-99.78
-99.97
-90.20
-85.09
-84.04
-84.76
-86.45
-88.31
-307
-311
-135
-139
-145
-150
-156
-160
-163
0.069
0.057
0.048
0.041
0.029
0.022
0.014
0.009
0.007
Step Response
1.2
1.0
0.8
0.6
0.4
0.2
-0.0
8.00
9.00
10.0
-90.11
-91.82
-93.41
-165
-167
-168
0.005
0.004
0.003
1.Normalized Group Delay:
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
0
1
2
3
4
5
Normalized Time (1/f sec)
Actual Corner Frequency (fc) in Hz
23
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