July 2017
Beginner
484 pages
13h 26m
English
Content preview from Op Amps for Everyone, 5th Edition
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16.9. Filter Coefficient Tables
The following tables contain the coefficients for the three filter types; Bessel, Butterworth, and Tschebyscheff. The Tschebyscheff tables (Table 16.11) are split into categories for the following passband ripples: 0.5, 1, 2, and 3 dB.
The table headers consist of the following quantities:
n is the filter order,
i is the number of the partial filter,
ai and bi are the filter coefficients,
Table 16.6
Bessel Coefficients
| n | i | ai | bi | ki = fCi/fC | Qi |
| 1 | 1 | 1.0000 | 0.0000 | 1.000 | – |
| 2 | 1 | 1.3617 | 0.6180 | 1.000 | 0.58 |
| 3 | 1 | 0.7560 | 0.0000 | 1.323 | – |
| 2 | 0.9996 | 0.4772 | 1.414 | 0.69 | |
| 4 | 1 | 1.3397 | 0.4889 | 0.978 | 0.52 |
| 2 | 0.7743 | 0.3890 | 1.797 | 0.81 | |
| 5 | 1 | 0.6656 | 0.0000 | 1.502 | – |
| 2 | 1.1402 | 0.4128 | 1.184 | 0.56 | |
| 3 | 0.6216 | 0.3245 | 2.138 | 0.92 | |
| 6 | 1 | 1.2217 | 0.3887 | 1.063 | 0.51 |
| 2 | 0.9686 | 0.3505 | 1.431 | 0.61 | |
| 3 | 0.5131 | 0.2756 | 2.447 | 1.02 | |
| 7 | 1 | 0.5937 | 0.0000 | 1.648 | – |
| 2 | 1.0944 ... |
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