Tech information / Filtering Techniques with Ferrite Cores
Filtering is an element of EMC design that suppresses conductive noise in conductors such as cables and IC leads. It attenuates or absorbs noise in unnecessary range while allowing only signals at specified necessary frequencies to pass through. Installing the ferrite cores over the affected cables where the current flows increase the impedance and reduce the propagation of noise current due to the magnetization of the ferrite cores. In general, the phenomenon of the magnetization of ferrite cores is the process of converting the noise to negligible heat energy and dissipating it.
