What is a bandpass filter?

Question

Accepted Answer

A bandpass filter is a type of electronic filter that allows signals within a certain frequency range to pass through while attenuating signals outside of that range.

Bandpass filters are used to selectively filter out unwanted frequencies in electronic circuits.
They have a lower cutoff frequency and an upper cutoff frequency that define the range of frequencies that can pass through.
Examples of bandpass filters include LC bandpass filters, active bandpass filters, and SAW bandpass filters.

Accepted Answer

A bandpass filter is an electronic device or circuit that allows signals between two specific frequencies to pass, but that discriminates against signals at other frequencies. Some bandpass filters require an external source of power and employ active components such as transistors and integrated circuits; these are known as active bandpass filters. Other bandpass filters use no external source of power and consist only of passive components such as capacitors and inductors; these are called passive bandpass filters.

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