Bandpass Filter
it's a circuit that allows only a certain frequency to pass, while effectively suppressing signals of the remaining frequencies. Because of its signal selectivity, it is widely used in electronic design. For example, the RLC oscillator loop is an analog bandpass filter. A bandpass filter is a filter that can pass frequency components in a certain frequency range, but attenuates frequency components in other frequency ranges to very low levels, as opposed to the concept of a band stop filter. Bandpass filters are commonly used in audio and radio communication systems to reduce noise and other interfering signals and improve signal quality.
The frequency response curve of a bandpass filter is a wide-band valley with a higher gain in the bandpass range and a smaller weakening in the out-of-band range. In electronic design, bandpass filters are often used to select the desired frequency band or to reduce noise and interference in the signal.
