FILTERS

Filters:

Filters are of two types

1.Active filters:The filters which are designed by using Active elements are known as Active elements.

2.Passive filters:The filters which are designed by using Passive elements are known as Passive elements.

In these passive filters there are

1.Low pass filters

2.High pass filters

3.Band pass filters

4.Band elimination filter or Band stop filters

5.All pass filters

Passive filters

Low pass filters are used to pass or allow only low frequencies they do not pass high frequencies
High pass filters are used to pass or allow only high frequencies they do not allow low frequencies
Band pass filters are the combination of low pass and high pass filters they allow a particular band of frequencies between low and high frequencies
Band elimination filters are used to eliminate or stop a particular band of frequencies between low and high frequencies
All pass filters are used to pass both low,high and any rang of frequencies.

All these filters are used according to the requirement.

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