90PF Datasheet, PDF (16/18 Pages) Frequency Devices, Inc. – Dual Channel Programmable Filter/Amplifier Card

Appendix A
Theoretical Transfer Characteristics
f/fc
Amp Phase Delay1
(Hz) (dB) (deg) (sec)
0.10 -93.4 168
0.20 -84.8 156
0.30 -86.0 143
0.40 -92.6 310
0.50 -85.0 295
0.334
0.344
0.363
0.392
0.439
0.55 -114 287
0.60 -84.1 458
0.70 -57.0 617
0.80 -32.8 589
0.85 -22.6 569
0.472
0.515
0.652
0.962
1.325
0.90 -12.3 538
0.95 -3.08 483
1.00 -0.05 414
1.10 -0.03 341
1.20 -0.01 296
2.198
3.993
3.062
1.498
1.039
1.30 -0.04 264
1.40 -0.05 239
1.50 -0.03 219
1.60 -0.01 202
1.70
0.00 188
0.773
0.612
0.505
0.426
0.364
1.80
0.00 176
1.90 -0.01 165
2.00 -0.02 156
2.50 -0.05 122
3.00 -0.05 101
0.315
0.275
0.243
0.145
0.097
4.00 -0.03 75.1 0.053
5.00 -0.01 59.8 0.034
6.00 -0.01 49.7 0.023
7.00
0.00 42.5 0.017
8.00
0.00 37.2 0.013
9.00
0.00 33.0
0.010
10.0
0.00 29.7
0.008
8-Pole, 6-Zero
Elliptic, 1.56
High-Pass
Frequency Response
0
-20
-40
-60
-80
-100
0.1
2 3 4 5 6 78 _1.0 2 3 4 5 6 7 _10.0
Normalized Frequency(f/fc)
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).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
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