1/19/2008
Copyright 2005 – Tim Hoerning
35
Active Filters
•Active Filters by definition require a power source.
•Passive filters can only remove frequency components.  
•Active filters can boost as well as cut frequency bands. 
–Also allow for sharper transitions
–Allow multi-pole filters using solid state devices and capacitors instead of inductors (allows for implementation in integrated circuits)
Frequency
Text Box: Log-Mag
Log-Mag
Boost
Cut
Frequency
Text Box: Log-Mag
Log-Mag