An LC bandpass filter is an electronic circuit or device used in electronics and telecommunications to allow a specific range of frequencies to pass through while attenuating or blocking frequencies outside of that range. It is called an "LC" filter because it typically consists of passive components: inductors (L) and capacitors (C).

The LC bandpass filter is designed to have a certain center frequency (the frequency at which it provides maximum transmission) and a specified bandwidth (the range of frequencies it allows to pass through). It achieves this by using a combination of inductors and capacitors that create resonance at the center frequency, allowing signals around that frequency to pass with minimal attenuation.

LC bandpass filters are commonly used in various applications, including radio receivers, RF (radio frequency) communication systems, audio equipment, and more, where the selective filtering of a specific range of frequencies is essential for proper signal processing and rejection of unwanted signals or interference. They are a fundamental component in many electronic circuits and systems to ensure the desired signal quality and performance.