Electronics Fundamentals/Electronic Filter

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Electronic Filters[edit]

A filter is an electronic network where the output voltage, current, or power varies in a predictable way with the input frequency. Filters can be designed to pass high frequencies and block low frequencies, to pass only low frequencies, to pass only a specific band of frequencies, to block only a specific band of frequencies, or any combination thereof. Generally a filter will exhibit the same output for all input frequencies within its "pass band", that range of frequencies which it is designed to allow to pass.

Type of Filters[edit]

Low Pass Filter provides stable voltage that does change with frequency over low frequency
High Pass Filter provides stable voltage that does change with frequency over high frequency
Band Pass Filter provides stable voltage that does change with frequency over a band frequency
Resonance Tuned Band Pass Filter provides stable voltage that does change with frequency over a selective band frequency
Resonance Tuned Band Rejected Filter provides stable voltage that does change with frequency over a selective band frequency