Filters are of many types & in Passive filters we deal in T and P types of networks.We have filters of low pass,high pass,band stop and crystal type.We also have filters called prototypes,m derived & m derived terminating half sections.

Low pass Filters
Types : 1. Protype Filter
            2. m-derived filter(m=3)
            3. 2 terminating half sections(m=0.6)

High Pass Filters
Types : 1. Prototype Filter
            2. m-derived Filter(m=0.3)
            3. 2 terminating half sections(m=0.6)

 This Module of Active Filters contains 12 Filters.Op Amps have been used to design the active RC circuits which are used as filters .A filter may be described in terms of the basic function of the filter.The following filters are there:

 1.Single Feedback based Low Pass Filter.
 2.Single Feedback based Band Pass Filter.
 3.Single Feedback based High Pass Filter.
 4.Multiple Feedback based Low Pass Filter.
 5.Multiple Feedback based High Pass Filter.
 6.Multiple Feedback based Band Pass Filter.