Band-stop filters
Frequenzgang
The bandwidth in the stop band of the band-stop filter is defined by the cut-off frequencies
and
. They are defined as the frequencies at which the amplitude has dropped by 3dB (~0.707). When parameterizing the band-stop filter, the bandwidth can be defined by specifying the quality factor P-AXIS-00080 (filter[i].guete). The quality factor is the ratio of the characteristic filter frequency by the bandwidth
:
![Band-stop filters 5:](Images/png/15313106187__Web.png)
With a higher Q factor, the frequency range becomes smaller. The following relationship (geometrical mean) exists between the characteristic frequency of the band-stop filter and the cut-off frequencies
and
:
![Band-stop filters 9:](Images/png/15313097739__Web.png)
The filter prototype P-AXIS-00153 has only a minor influence on the filter behavior of band-stop filters.
![Band-stop filters 10:](Images/png/15313107211__Web.png)
![Band-stop filters 11:](Images/jpg/15313107723__Web.jpg)