824L8B Datasheet, PDF (9/13 Pages) List of Unclassifed Manufacturers – 2 X 2 4-Pole Filters

Low-Pass
Appendix A
4-Pole, 0.2 dB Ripple
Chebychev
Theoretical Transfer Characteristics
f/fc
Amp Phase Delay1
(Hz) (dB) (deg) (sec)
0.00
0.000 0.00 .478
0.10
0.039 -17.3 .487
0.20
0.129 -35.2 .509
0.30
0.195 -54.0 .533
0.40
0.174 -73.4 .547
0.50
0.074 -93.2 .553
0.60 0.000 -113
.575
0.70 0.074 -135
.654
0.80 0.199 -162
.836
0.85 0.063 -178
.947
0.90 -0.443 -196
1.02
Frequency Response
0
-20
-40
-60
-80
-100
0.1
2 3 4 5 6 78 _1.0 2 3 4 5 6 78_10.0
Normalized Frequency(f/fc)
0.95 -1.47 -214
.989
1.00 -3.01 -231
.873
1.10 -6.89 -257
.583
1.20 -10.8 -274
.385
1.30 -14.5 -286
.271
Delay (Normalized)
2.0
1.40 -17.7 -294
.202
1.50 -20.7 -300
.158
1.60 -23.4 -306
.128
1.70 -25.8 -310
.107
1.80 -28.1 -313
.090
1.0
1.90 -30.2 -316
.078
2.00 -32.2 -319
.068
2.25 -36.7 -324
.051
2.50 -40.6 -328
.039
2.75 -44.1 -331
.032
3.00 -47.3 -334
.026
3.25 -50.2 -336
.022
3.50 -52.8 -338
.018
4.00 -57.6 -341
.014
5.00 -65.5 -345
.009
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
6.00 -71.9 -347
.006
1.2
7.00 -77.3 -349
.004
8.00 -82.0 -351
.003
1.0
9.00 -86.1 -352
.003
10.0 -89.8 -352
.002
0.8
0.6
0.4
0.2
1.Normalized Group Delay:
-0.0
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).
0
1
2
3
4
5
Normalized Time (1/f sec)
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
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