ALLIED'S ELECTRONICS DATA HANDBOOK

Table of Values for Attenuator Network Formulas

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db Voltage or Current Ratio B C D E
0.10 0.98855 0.011447 86.360 0.005756 86.857
0.20 0.97724 0.022763 42.931 0.011512 43.426
0.25 0.97163 0.028372 34.247 0.014390 34.739
0.30 0.96605 0.034046 28.456 0.017268 28.947
0.40 0.95499 0.045008 21.219 0.023022 21.707
0.50 0.94406 0.055939 16.876 0.028774 17.362
0.60 0.93325 0.066745 13.982 0.034525 14.428
0.70 0.92257 0.077429 11.915 0.040274 12.395
0.75 0.91728 0.082724 11.088 0.043147 11.567
0.80 0.91201 0.087989 10.365 0.046019 10.842
0.90 0.90157 0.098429 9.1596 0.051762 9.6337
1.00 0.89125 0.108750 8.1955 0.057501 8.6667
1.50 0.84140 0.158600 5.3050 0.086133 5.7619
2.00 0.79433 0.205670 3.8621 0.11462 4.3048
2.50 0.74989 0.250110 2.9983 0.14293 3.4268
3.00 0.70795 0.292050 2.4240 0.17100 2.8385
3.50 0.66834 0.331660 2.0152 0.19879 2.4158
4.00 0.63096 0.369040 1.7097 0.22627 2.0966
4.50 0.59566 0.404340 1.4732 0.25340 1.8465
5.00 0.56234 0.437660 1.2849 0.28013 1.6448
6.00 0.50119 0.498810 1.0048 0.33228 1.3386
7.00 0.44668 0.553320 0.80728 0.38247 1.1160
7.50 0.42170 0.578300 0.72920 0.40677 1.0258
8.00 0.39811 0.601890 0.66143 0.43051 0.94617
9.00 0.35481 0.645190 0.54994 0.47622 0.81183
10.00 0.31623 0.683770 0.46248 0.51949 0.70273
11.00 0.28184 0.718160 0.39244 0.56026 0.61231
12.00 0.25119 0.748810 0.33545 0.59848 0.53621
12.50 0.23714 0.762860 0.31085 0.61664 0.50253
13.00 0.22387 0.776130 0.28845 0.63416 0.47137
14.00 0.19953 0.800470 0.24926 0.66732 0.41560
15.00 0.17783 0.822170 0.21629 0.69804 0.36727
16.00 0.15849 0.841510 0.18834 0.72639 0.32515
17.00 0.14125 0.858750 0.16449 0.75246 0.28826
17.50 0.13335 0.866650 0.15387 0.76468 0.27153
18.00 0.12589 0.874110 0.14402 0.77637 0.25584
19.00 0.11220 0.887800 0.12638 0.79823 0.22726
20.00 0.100000 0.900000 0.111111 0.81818 0.20202
21.00 0.089125 0.910870 0.097846 0.83634 0.17968
22.00 0.079433 0.920570 0.086287 0.85282 0.15987
22.50 0.074989 0.925010 0.081069 0.86048 0.15083
24.00 0.063096 0.936900 0.067345 0.88130 0.12670
25.00 0.056234 0.943770 0.059585 0.89352 0.11283
26.00 0.050119 0.949880 0.052763 0.90455 0.10049
27.00 0.044668 0.955330 0.046757 0.91448 0.089515
27.50 0.042170 0.957830 0.044026 0.91907 0.084490
28.00 0.039811 0.960190 0.041416 0.92343 0.079748
30.00 0.031623 0.968380 0.032655 0.93869 0.063309
32.00 0.025119 0.974880 0.025766 0.95099 0.050269
32.50 0.023714 0.976290 0.024290 0.95367 0.047454
33.00 0.022387 0.977610 0.022900 0.95621 0.044797
34.00 0.019953 0.980050 0.020359 0.96088 0.039921
35.00 0.017783 0.982220 0.018105 0.96506 0.035577
36.00 0.015849 0.984150 0.016104 0.96880 0.031706
37.50 0.013335 0.986660 0.013515 0.97368 0.026675
38.00 0.012589 0.987410 0.012750 0.97513 0.025183
39.00 0.011220 0.988780 0.011348 0.97781 0.022443
40.00 0.010000 0.990000 0.010101 0.98020 0.020002
42.00 0.0079433 0.992060 0.0080069 0.98424 0.015888
42.50 0.0074989 0.992500 0.0075556 0.98511 0.014999
44.00 0.0063096 0.993690 0.0063496 0.98746 0.012620
45.00 0.0056234 0.994380 0.0056552 0.98882 0.011247
47.50 0.0042170 0.995780 0.0042348 0.99160 0.0084341
48.00 0.0039811 0.996020 0.0039970 0.99207 0.0079623
50.00 0.0031623 0.996840 0.0031723 0.99370 0.0063246
51.00 0.0028184 0.997180 0.0028264 0.99438 0.0056368
52.00 0.0025119 0.997490 0.0025182 0.99499 0.0050238
54.00 0.0019953 0.998000 0.0019993 0.99602 0.0039905
55.00 0.0017783 0.998220 0.0017815 0.99645 0.0035566
56.00 0.0015849 0.998420 0.0015874 0.99684 0.0031698
57.00 0.0014125 0.998590 0.0014145 0.99718 0.0028251
60.00 0.0010000 0.999000 0.00100100 0.99800 0.0020000
64.00 0.00063096 0.999370 0.00063136 0.99874 0.0012619
65.00 0.00056234 0.999440 0.00056266 0.99888 0.0011247
66.00 0.00050119 0.999500 0.00050144 0.99900 0.0010024
68.00 0.00039811 0.999600 0.00039827 0.99200 0.0007962
70.00 0.00031623 0.999680 0.00031633 0.99370 0.0006325
72.00 0.00025119 0.999750 0.00025125 0.99500 0.0005024
75.00 0.00017783 0.999820 0.00017786 0.99964 0.0003557
76.00 0.00015849 0.999840 0.00015851 0.99968 0.0003170
78.00 0.00012589 0.999870 0.00012591 0.99975 0.0002518
80.00 0.00010000 0.999900 0.00010000 0.99980 0.0002000
84.00 0.00006310 0.999940 0.00006310 0.99987 0.0001262
85.00 0.00005623 0.999940 0.00005624 0.99989 0.0001125
90.00 0.00003162 0.999970 0.00003162 0.99994 0.0000633
95.00 0.00001778 0.999980 0.00001778 0.99996 0.0000356
96.00 0.00001585 0.999980 0.00001585 0.99997 0.0000317
100.00 0.00001000 0.999990 0.00001000 0.99998 0.0000200

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