8-Pole
Bessel
Low-Pass
Appendix A
4
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Normalized Time (1/f sec)
S
Step Response
0
1
2
3
4
5
-0.2
-0.0
0.2
0.4
0.6
0.8
1.0
1.2
Normalized Time (1/f sec)
D
Delay
(Normalized)
0.1
1.0
2
3
4
5
6
7
8 9
0.0
0.5
1.0
1.5
0.15
Normalized Frequency(f/fc)
A
Frequency Response
0.1
1.0
10.0
2
3
4
5 6 7 8
2
3
4
5 6 7
-100
-80
-60
-40
-20
0
(sec)
.506
.506
.506
.506
.506
.506
Theoretical Transfer Characteristics
1
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.85
0.90
0.95
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
2.25
2.50
2.75
3.00
3.25
3.50
4.00
5.00
6.00
7.00
8.00
9.00
10.0
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).
Actual Delay =
Normalized Delay
Actual Corner Frequency (fc) in Hz
f/fc
(Hz)
Amp
(dB)
Phase
(deg)
Delay
-79.2
-89.8
-99.0
-107
-114
-33.4
-38.3
-43.1
-51.8
-66.8
-12.1
-13.7
-18.1
-23.1
-28.3
-6.10
-7.08
-8.16
-9.36
-10.7
-2.71
-3.01
-3.67
-4.40
-5.20
-1.06
-1.45
-1.91
-2.16
-2.42
0.00
-0.029
-0.117
-0.264
-0.470
-0.737
-610
-626
-638
-647
-655
-489
-509
-526
-552
-587
-345
-362
-402
-436
-465
-255
-273
-291
-309
-327
-173
-182
-200
-219
-237
-109
-128
-146
-155
-164
0.00
-18.2
-36.4
-54.7
-72.9
-91.1
.052
.038
.029
.023
.018
.241
.201
.170
.126
.077
.482
.468
.417
.352
.291
.505
.504
.502
.498
.492
.506
.506
.506
.506
.506
.506
.506
.506
.506
.506