What is the magnetic ring on the power cord for?
Shielding magnetic ring, also known as ferrite magnetic ring, is often used for detachable separation magnetic ring. It is an anti-interference component commonly used in electronic circuits and has a good suppression effect on high-frequency noise. Ferrite materials are generally used. (Mn-Zn).
The motherboard, CPU, power supply, and IDE data cable in the computer all work at a very high frequency, so there is a lot of space for stray electromagnetic interference signals in the computer, and the signal strength is several times dozens of outside the computer. times!
The magnetic ring has different impedance characteristics at different frequencies. Generally, the impedance is small at low frequencies. When the signal frequency increases, the impedance of the magnetic ring increases sharply. The normal and useful signals can pass well, the high-frequency interference signals can be well suppressed, and the cost is low.
