Ferrite magnetic beads are a type of anti-interference components with rapid application, which is cheap, easy to use and has remarkable effect on filtering high-frequency noise. Ferrite magnetic beads can not only be used to filter high-frequency noise in power supply circuits (DC and AC output), but also be used in other circuits. Especially in the digital circuit, because the pulse signal contains high frequency harmonic, which is also the main source of high frequency radiation of the circuit, it can play the role of magnetic beads on this occasion. Ferrite magnetic beads are also widely used in signal cable noise filtering.
