Inductors connected in series block high-frequency noises, whereas capacitors connected in parallel work to bypass high-frequency noises. They are used for radio tuning (frequency adjustment) or for cutting the bass/treble sound components of mid-range speakers, etc.Īlthough capacitors and inductors each have noise removal capabilities on their own, combining these two components will achieve a significant level of noise removal. They are used to cut low-frequency noise in the audible range, cut mid-range/bass sound components of treble speakers, etc.īand-pass filters are filter circuits that pass only signals at a specific frequency and cut signals at other frequencies. High-pass filters are filter circuits that cut DC and low-frequency signals and pass high-frequency signals. In audio, they are also used to cut treble/mid-range sound components of bass speakers. They are the most widely used filter circuits and are mainly used to cut high-frequency noise. Low-pass filters are filter circuits that pass DC and low-frequency signals and cut high-frequency signals.
LC filters are broadly classified into three types. By combining these components with opposite properties, noise can be cut and specific signals can be identified. In other words, capacitors and inductors are passive components with completely opposite properties. Conversely, inductors pass DC currents as they are, but pass AC less easily at higher frequencies.
LC filters refer to circuits consisting of a combination of inductors (L) and capacitors (C) to cut or pass specific frequency bands of an electric signal.Ĭapacitors block DC currents but pass AC more easily at higher frequencies. Technical Information Basic Knowledge of LC Filters
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