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Filter Design



            284  Chapter Six

















                        Figure 6.21 One way of properly combining half-sections.


















                        Figure 6.22 Another way of combining two half-sections.










                                                               Figure 6.23 Incorrect way of
                                                               combining two half-sections.



                        TABLE 6.1 Correction Factors for a Low-Pass Filter
                                        1
                        Number of sections* (   section   2 poles   1 L, 1 C  Adjustment factor
                                         2
                                          0.5                            1
                                          1.0                            1.05
                                          1.5                            1.10
                                          2.0                            1.15
                                          2.5                            1.20
                                          3.0                            1.25
                          *Before combining of the half-sections.



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