9 / 19 page
Low-Pass
8-Pole
Appendix A
Butterworth
9
0.1
1.0
10.0
2
3 4 5 6 78
2
3 4 5 6 7
Normalized Frequency(f/fc)
-100
-80
-60
-40
-20
0
0.1
1.0
2
3
4
5 6 7 8 9
Normalized Time (1/f sec)
0.0
1.0
2.0
1.5
0.15
0
1
2
3
4
5
Normalized Time (1/f sec)
-0.0
0.2
0.4
0.6
0.8
1.0
1.2
Frequency Response
Delay (Normalized)
Step Response
(sec)
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
-125
-135
-144
-153
-160
-76.3
-81.9
-87.1
-96.3
-112
-44.6
-48.2
-56.3
-63.7
-70.3
-23.4
-28.2
-32.7
-36.9
-40.8
-1.58
-3.01
-7.48
-12.9
-18.2
-671
-678
-683
-687
-691
-621
-629
-635
-646
-661
-560
-568
-586
-600
-611
-494
-511
-526
-539
-550
-0.001
-0.014
-0.121
-0.311
-0.738
0.00
0.00
0.00
0.00
0.00
0.00
-333
-360
-408
-445
-472
-185
-221
-261
-283
-307
0.00
-29.4
-59.0
-89.1
-120
-152
.023
.017
.013
.010
.008
.094
.080
.069
.052
.033
.253
.226
.174
.139
.113
.540
.448
.380
.328
.287
1.48
1.46
1.17
.873
.672
.956
1.04
1.19
1.29
1.40
.816
.819
.828
.843
.867
.903
25 Locust St., Haverhill, Massachusetts 01830
∑Tel :800/252-7074, 978/374-0761 ∑FAX:978/521-1839
e-mail: sales@freqdev.com
∑Web Address: http://www.freqdev.com ∑Fax on Demand: 978/521-5178
Korean ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
