Low-Pass
4-Pole, 0.2 dB Ripple
Chebychev
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
0.50
0.000
0.039
0.129
0.195
0.174
0.074
0.00
-17.3
-35.2
-54.0
-73.4
-93.2
.478
.487
.509
.533
.547
.553
0.000
0.074
0.199
0.063
-0.443
0.60
0.70
0.80
0.85
0.90
-113
-135
-162
-178
-196
.575
.654
.836
.947
1.02
2
2
0.1
3 4 5 6 78 1.0
3 4 5 67810.0
Normalized Frequency(f/fc)
.989
.873
.583
.385
.271
0.95
1.00
1.10
1.20
1.30
-1.47
-3.01
-6.89
-10.8
-14.5
-214
-231
-257
-274
-286
Delay (Normalized)
2.0
1.0
0.0
1.40
1.50
1.60
1.70
1.80
-17.7
-20.7
-23.4
-25.8
-28.1
-294
-300
-306
-310
-313
.202
.158
.128
.107
.090
-30.2
-32.2
-36.7
-40.6
-44.1
1.90
2.00
2.25
2.50
2.75
-316
-319
-324
-328
-331
.078
.068
.051
.039
.032
2
3
4
0.1
5 6 7 8 91.0
0.15
1.5
3.00
3.25
3.50
4.00
5.00
-47.3
-50.2
-52.8
-57.6
-65.5
-334
-336
-338
-341
-345
.026
.022
.018
.014
.009
Normalized Time (1/f sec)
Step Response
6.00
7.00
8.00
9.00
10.0
-71.9
-77.3
-82.0
-86.1
-89.8
-347
-349
-351
-352
-352
.006
.004
.003
.003
.002
1.2
1.0
0.8
0.6
0.4
0.2
-0.0
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).
0
1
2
3
4
5
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
12 \
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