I believe you often hear your electronic engineer colleagues mention the word EMC, and you may see them rack their brains and design or test repeatedly to solve the anti-interference problem of electronic circuits. What exactly does EMC mean? How difficult is this problem to solve? Strictron Electronics will tell you in the most accessible language.

    EMC, fully spelled as electromagnetic compatibility, refers to the electromagnetic compatibility of electronic circuits. Before explaining, let's first give an example that is close to life. The earphones we use everyday must have two functions: first, the sound should be in our ears without expanding, so that we can listen without affecting others; Second, noise reduction is required, external noise cannot interfere with the sound of the earphone itself. After the earphone example, let's return to EMC, what is electromagnetic compatibility? That is, various electromagnetic radiation in electronic circuits. The radiation generated by the circuit itself should be suppressed to avoid interference with other parts, which is similar to the sound emitted by the earphone and cannot be transmitted to the outside world to affect others; The radiation generated by other circuits should be shielded to resist its interference, which is similar to the external sound, and the effect of the earphone itself should be guaranteed through noise reduction. 

    To sum up, EMC is divided into two parts, and its professional terms are EMI (fully spelled as electromagnetic interference) and EMS (fully spelled as electromagnetic susceptability, also known as electromagnetic tolerance). It means that electronic equipment or a certain circuit should not only be able to work or operate normally in a complex and diverse electromagnetic environment, but also not produce excessive electromagnetic radiation to interfere with the normal work or operation of other electronic equipment or circuits.

    After understanding EMC, it is easy to understand why the electronic engineers often repeatedly change the design. The rectification they have made is to add "shielding glass" to an electronic equipment or circuit, and put on "noise helmet" at the same time. The products supplied by Strictron Electronics Limited, such as ferrite beads, ferrite cores, inductors, etc, are widely used in the circuits to achieve this purpose.