What Is The Function And Function Of The Magnetic Ring On The Computer Cable?

      We usually use a host computer with a magnetic ring on the data line connected to the display screen. It is equivalent to a small inductor, which can prevent the induction signal generated by high-frequency electromagnetic radiation on the data line.

The magnetic ring on the data line is simply to resist interference.

1. To prevent the interference caused by the current surge when inserting or unplugging the wire;

2. Prevent electromagnetic interference in the space and make the transmission more stable. The motherboard, CPU, power supply, and IDE data cables in the computer chassis all work at very high frequencies, resulting in a large amount of space-borne spurious electromagnetic interference signals in the chassis, and the signal strength is several times the number outside the chassis. ten times! The USB cable without the magnetic ring does not take shielding measures in this space, then these USB lines become a good antenna, receiving all kinds of messy high-frequency signals in the surrounding environment, and these signals are superimposed on the originally transmitted signal. It will even change the useful signal that was originally transmitted, and it is prone to problems.

In order to improve the transmission rate and stability, and in order to reduce the interference of transmission lines to other devices, such as sound cards, the static shielding layer is designed. This shielding layer is made of a thin metal foil or a plurality of fine copper wires woven into a mesh shape, and the principle of the surface effect of the electrostatic field is applied. That is, the outer surface of the data transmission line is covered with a metal film, and the shielding layer is grounded to the chassis, so that the data line can be isolated from the space interference signal.

Absorption magnetic ring, also known as ferrite ring, is often used in detachable magnetic ring. It is a commonly used anti-interference element in electronic circuits, and it has good inhibition effect on high-frequency noise. Generally, ferrite materials are used. Made of (Mn-Zn). The magnetic ring has different impedance characteristics at different frequencies. Generally, the impedance at the low frequency is very small. When the signal frequency rises, the impedance exhibited by the magnetic ring rises sharply. The normal and useful signals are passed very well, and the passage of high-frequency interference signals can be well suppressed, and the cost is low. High-quality data cables with magnetic rings give better product performance, and inferior USB cables reduce product performance.

There is also an absorption ring, also known as a ferrite ring, which is commonly used for a detachable magnetic ring. It is a commonly used anti-interference element in electronic circuits and has a good suppression effect on high-frequency noise.

Therefore, it is not surprising that all of us are looking at plastic-type integrated magnetic rings on display signal lines, connection lines, and even high-end keyboards and mice.