Filters in electronics

Commonly filters are used to remove the unwanted signal , which means  noise. Noise is commonly occur when we sharing data from one to others. In transmission part noise occur, that makes disturbances.

Filters placed in the reciever section because there only we have to get pure part of information....

Filters are mainly four types those are as follows....
1. Low pass filters
2. High pass filters
3. Band pass filters
4. Band reject filters

1. Low pass filters :
   The filters which are allow below cut-off frequency those type of filters we called as low pass filters

2. High pass filters :
The filters which are allowing only the above certain cut-off frequency those filters we called as high pass filters.

3. Band pass filters: 
The filters those are allowing only the certain band of frequency those type of filters are called as band pass filters.

4. Band reject filters: 
The filters those are used for reject teh certain band of frequencies and allow all other frequencies. These type of filters
we called as band reject filters....

In this we have notch band pass and band reject filters....