Appendix A
August 1999

 


High-Pass
8-Pole
Butterworth


Theoretical Transfer Characteristics
f/fc Amp Phase Delay1
(Hz) (dB) (deg) (sec)
       
0.10 -160 691 0.819
0.20 -112 661 0.828
0.30 -83.7 631 0.843
0.40 -63.7 600 0.867
0.50 -48.2 568 0.903
       
0.60 -35.5 535 .956
0.70 -24.8 499 1.04
0.80 -15.6 459 1.19
0.85 -11.6 437 1.29
0.90 -8.06 413 1.40
       
0.95 -5.15 386 1.48
1.00 -3.01 360 1.46
1.20 -0.229 275 0.873
1.40 -0.020 226 0.540
1.60 -0.002 194 0.380
       
1.80 0.00 170 0.287
2.00 0.00 152 0.226
2.50 0.00 120 0.139
3.00 0.00 99.2 0.094
4.00 0.00 74.0 0.052
       
5.00 0.00 59.0 0.033
6.00 0.00 49.0 0.023
7.00 0.00 42.1 0.017
8.00 0.00 36.8 0.013
9.00 0.00 32.7 0.010
10.0 0.00 29.4 0.008
 

Notes:

  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).



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