Upswing knowledge: Is there a small flaw in the connection line of electronic devices?
Have you ever thought about the small cylindrical objects on the power cord, mouse, keyboard, notebook, printer, etc. What are the meanings of their existence?
Yes, this small object was deliberately loaded. These "small cockroaches" are called ferrite beads or ferrite chokes, and their sole purpose is to reduce electromagnetic interference and radio frequency interference.
Simply put, it is used to reduce unnecessary signals or noise.
We all know that when two electromagnetic devices are connected by cables, this cable plays the role of an antenna. Then the problem comes. Like all antennas, these cables can also receive and propagate signals from other unrelated devices. As a result, noise or unwanted signals are generated.
This is the need for ferrite beads to eliminate broadcast signals and ensure that the cable does not send any unwanted interfering signals.
If you open these little cockroaches, you will find a small cylindrical solid made of ferrite inside, which is magnetic.
Ferrite is made of iron oxide (that is, rust) combined with other metals, black, hard, and brittle. But its magnetic performance effectively eliminates interference.
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