1/19/2008
Copyright
2005 – Tim Hoerning
33
Filtering Basics
•Filters are designed to allow some frequencies to pass unaltered (the pass band), while some are attenuated (the stop band).
•Filters are described by the size and location of the bands and the attenuation possible in the stop band
frequency
dB
frequency
dB
frequency
dB
frequency
dB
Ideal
Filter types
Low Pass
High
Pass
Band
Pass
Band
Stop