D01L8B Datasheet, PDF (5/10 Pages) Frequency Devices, Inc. – 32-Pin DIP 8-, 6-, 4-Pole Filters

Low-Pass
Appendix A
4-Pole
Bessel
Theoretical Transfer Characteristics
f/fc
Amp Phase Delay1
(Hz) (dB) (deg) (sec)
0.00 0.00
0.00 .336
0.10 -0.028 -12.1 .336
0.20 -0.111 -24.2 .336
0.30 -0.251 -36.3 .336
0.40 -0.448 -48.4 .336
0.50 -0.705 -60.6 .336
0.60 -1.02 -72.7 .336
0.70 -1.41 -84.8 .336
0.80 -1.86 -96.8 .335
0.85 -2.11
-103
.334
0.90 -2.40
-109
.333
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)
0.95 -2.69 -115
.332
1.00 -3.01 -121
.330
1.10 -3.71 -133
.325
1.20 -4.51 -144
.318
1.30 -5.39 -156
.308
Delay (Normalized)
1.0
1.40 -6.37 -166
.295
1.50 -7.42 -177
.280
1.60 -8.54 -187
.263
1.70 -9.71 -195
.246
1.80 -10.9 -204
.228
0.5
1.90 -12.2 -212
.211
2.00 -13.4 -219
.194
2.25 -16.5 -235
.158
2.50 -19.5 -248
.129
2.75 -22.4 -259
.107
3.00 -25.1 -267
.089
3.25 -27.6 -275
.076
3.50 -30.0 -281
.065
4.00 -34.4 -291
.049
5.00 -41.9 -305
.031
6.00 -48.1 -315
.021
7.00 -53.4 -321
.016
8.00 -58.0 -326
.012
9.00 -62.0 -330
.009
10.0 -65.7 -333
.008
0.0
0.1 ^{0.15 2}
3 4 5 6 7 8 9_1.0 1.5
Normalized Time (1/f sec)
Step Response
1.2
1.0
0.8
0.6
0.4
0.2
-0.0
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
-0.2
0
1
2
3
4
5
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
Normalized Time (1/f sec)
2
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