A, and for a high quality of absorption filter of design for, should selection high permeability of has consumption material, is common of anti-interference components, ferrite magnetic ring, also called anti-interference magnetic ring, anti-interference magnetic ring in high impedance circuit in the of role does not obviously, in line in the on high frequency components by rendering of resistance about is 10 to hundreds of ω, instead, in low impedance circuit (as power distribution, and power or RF Circuit) in the using very effective.

Second, larger than 10MHz high, anti-jamming magnetic inductance is still very small, and the impedance is very large, when high frequency signal energy of magnetic materials, is converted to heat, from hinder high frequency signals through, inhibited the disturbance of high frequency signals. Usually best suppression suppression of frequency range with ferrite components related to the higher the permeability, restrain the frequency, the lower the larger ferrite, inhibiting effect is better, when the volume is constant, long, thin good inhibitory effect than short and thick within the small inhibitory effect and the more the better. Which gives our designers with a good selection of anti-jamming magnetic ring.

Three, and different frequency Xia magnetic ring will has different of impedance characteristics, General low frequency is impedance is small, high frequency Shi impedance sharply increased, signal frequency more high, magnetic field more easy radiation out, General signal line is no shield of, they kept received around of high frequency signal, these signal of overlay change has actual to transmission of signal, magnetic ring can is good of through useful of signal, while inhibit high frequency of interference signal.

Four, and in magnetic ring of using method Shang, following views can provides reference: inhibit total die signal interference Shi, can will signal (even root difference signal line) or power line (plus or minus line) while through anti-interference magnetic ring, to increased effect, can in magnetic ring Shang symmetric of around several circle, increased inductance volume, enhanced on total die signal of absorption effect, but on poor touch signal no effect, anti-interference magnetic ring should installation in near interference source of place, for entered output circuit, should as near shield box of import and export.

Five, no matter what kind of interference is magnetic, not performance, the higher the better, but for their own electronic products. If it is a high-frequency interference, use a zinc-nickel anti-jamming magnetic ring, because zinc-nickel magnetic ring is a high frequency of low magnetic material, if it is a low frequency interference filter can be operated by MN-Zn anti-jamming magnetic ring, MN-Zn is suitable for use in low frequency high magnetic materials.