8-Pole, 6-Zero
Elliptic, 1.77
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
-25.7
-51.6
-77.9
-105
0.713
0.716
0.724
0.740
0.767
-0.004
-0.014
-0.024
-0.020
0.50
0.55
0.60
0.65
0.70
0.007
0.022
0.033
0.031
0.014
-133
-148
-163
-179
-196
0.811
0.840
0.872
0.908
0.946
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
-0.015
-0.041
-0.046
-0.016
-0.025
-213
-232
-251
-272
-296
0.989
1.04
1.12
1.23
1.40
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
-0.035
-1.76
-8.28
-18.4
-29.3
-40.1
-51.5
-65.2
-75.0
-113.0
-83.6
-82.0
-83.7
-87.8
-85.8
-323
-392
-467
-522
-558
-578
-594
-606
-611
-616
-440
-444
-447
-450
-280
1.65
2.14
1.86
1.19
0.753
0.517
0.381
0.296
0.265
0.239
0.217
0.198
0.182
0.168
0.126
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
-82.0
-83.5
-88.2
-99.9
-87.2
-83.1
-82.1
-83.1
-84.6
-289
-295
-301
-305
-134
-140
-148
-154
-157
0.099
0.081
0.067
0.057
0.040
0.030
0.018
0.013
0.009
Step Response
1.2
1.0
0.8
0.6
0.4
0.2
-0.0
8.00
9.00
10.0
-86.2
-87.8
-89.3
-160
-163
-164
0.007
0.005
0.004
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
14
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