Appendix A
August 1999

 


High-Pass
2-Pole
Butterworth


Theoretical Transfer Characteristics
f/fc Amp Phase Delay1
(Hz) (dB) (deg) (sec)
       
0.10 -40.00 172 .227
0.20 -27.97 164 .234
0.30 -20.95 155 .243
0.40 -16.03 146 .255
0.50 -12.31 137 .265
       
0.60 -9.40 127 .271
0.70 -7.13 117 .270
0.80 -5.37 108 .262
0.85 -4.65 103 .255
0.90 -4.02 98.5 .246
       
0.95 -3.48 94.2 .236
1.00 -3.01 90.0 .225
1.20 -1.71 75.5 .179
1.40 -1.01 64.1 .138
1.60 -0.62 55.4 .106
       
1.80 -0.40 48.7 .083
2.00 -0.26 43.3 .066
2.50 -0.11 34.0 .041
3.00 -0.05 27.9 .027
4.00 -0.02 20.7 .015
       
5.00 -0.01 16.4 .009
6.00 0.00 13.6 .006
7.00 0.00 11.7 .005
8.00 0.00 10.2 .004
9.00 0.00 9.04 .003
10.0 0.00 8.13 .002
 

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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