Low-Pass
4-Pole, 0.5 dB Ripple
Appendix A
Theoretical Transfer Characteristics
1
f/fc
Amp
Phase
Delay
(Hz)
(dB)
(deg)
(sec)
0.00
0.00
0.00
.476
0.10
0.087
-17.3
.492
0.20
0.295
-35.7
.533
0.30
0.474
-55.7
.577
0.40
0.463
-76.9
.596
0.50
0.248
-98.2
.583
0.60
0.025
-119
.578
0.70
0.072
-141
.647
0.80
0.432
-168
.881
0.85
0.482
-185
1.06
0.90
0.062
-205
1.18
0.95
-1.12
-226
1.13
1.00
-3.01
-245
.946
1.10
-7.61
-272
.559
1.20
-12.0
-288
.345
1.30
-15.9
-298
.235
1.40
-19.3
-305
.173
1.50
-22.4
-311
.134
1.60
-25.1
-315
.108
1.70
-27.6
-318
.089
1.80
-29.9
-321
.075
-32.1
1.90
-324
.065
-34.1
2.00
-326
.057
-38.6
2.25
-301
.042
-42.6
2.50
-334
.033
-46.1
2.75
-336
.026
3.00
-49.3
-339
.021
3.25
-52.2
-340
.018
3.50
-54.9
-342
.015
4.00
-59.7
-344
.011
5.00
-67.6
-347
.007
6.00
-74.0
-350
.005
7.00
-79.4
-351
.004
8.00
-84.1
-352
.003
9.00
-88.2
-353
.002
10.0
-91.9
-354
.002
Chebychev
Frequency Response
0
Amp (dB)
-20
-40
-60
-80
-100
0.1
2
1.0
10.0
Normalized Frequency(f/fc)
3 4 5 6 78
2
3 4 5 6 78
Delay
(Normalized)
2.0
Delay (sec)
1.0
0.0
0.1
0.15 2
1.0
1.5
Normalized Time (1/f sec)
3
4
5 6 7 89
Step Response
Step Response (V/V)
1.2
1.0
0.8
0.6
0.4
0.2
-0.0
0
1
2
3
4
Normalized Time (1/f sec)
5
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).
Actual Delay =
Normalized Delay
Actual Corner Frequency (fc) in Hz
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15
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