Zener_Diode
New Member
Hey all,
What are the advantages of active filters vs passive one?
I read this document:
https://www.electro-tech-online.com/custompdfs/2010/11/sloa088.pdf
I read in the first time about Q-factor for LPF/HPF. In the document on page 12 (16-11) is written "The higher the Q value, the more a filter inclines to instability."
in section 16.3.2.2 there is an explanation about Multiple Feedback (MFB) topology. the first sentance is "The MFB topology is commonly used in filters that have high Qs and require a high gain".
As I undestand we don't want filters to oscillate, why should I want high Q for filter?
on page 4 I see alfa1=alfa2=alfa3=...=alfa=sqrt(2,sqrt(n,2)-1) . Where is it come from?
Thanks ahead
Zener_Diode`
What are the advantages of active filters vs passive one?
I read this document:
https://www.electro-tech-online.com/custompdfs/2010/11/sloa088.pdf
I read in the first time about Q-factor for LPF/HPF. In the document on page 12 (16-11) is written "The higher the Q value, the more a filter inclines to instability."
in section 16.3.2.2 there is an explanation about Multiple Feedback (MFB) topology. the first sentance is "The MFB topology is commonly used in filters that have high Qs and require a high gain".
As I undestand we don't want filters to oscillate, why should I want high Q for filter?
on page 4 I see alfa1=alfa2=alfa3=...=alfa=sqrt(2,sqrt(n,2)-1) . Where is it come from?
Thanks ahead
Zener_Diode`