Transducers

EMC stands for electromagnetic compatibility, and EMC is the term used to describe how well a system or device is able to function in an electromagnetic environment without introducing electromagnetic disturbances that interfere with the operation of other electrical products in the environment.

The electronic devices that can operate and meet the criteria are called electromagnetically compatible devices.

Electromagnetic Compatibility or EMC is a branch of electrical sciences which deals with the deliberate, the generation and reception of electromagnetic interference or EMI undesirable that such energy may induce.

A very good technique to reduce EMI is the technique that spread spectrum modulates the signal and spreads the energy over a wide range of frequencies. Spread Spectrum controls and modulates the clock signal so that it does not contribute significantly to the jitter.

It has been shown that successful using spread spectrum, radiation can be lowered by 7dB to 20dB depending on the degree of modulation.

The objective of the electromagnetic compatibility is to obtain the proper functioning in the same environment of different types of electrical devices that use electromagnetic phenomena, and to avoid possible interference effects.

This is achieved by pursuing two different types of problems, and these problems are the emission and susceptibility. Emissions are related to any undesired generation with any electromagnetic source, and also counter-measures, that should be taken so as to minimalise generation among them and to prevent the escape of energy remaining in the external environment.

On the contrary, the problems are intended susceptibility to the proper operation of electrical equipment which are referred to as the victim when in the presence of any unwanted electromagnetic interference.

Electromagnetic compatibility is achieved especially when dealing with issues of sensitivity and output, in other words, the hardening of the potential victim and soothe the sources of interference. The path between the victim and the source can be addressed to improve the results even better.

In today's busy offices electromagnetic interference is usually due to higher clock speeds are found in PCs and workstations. The radiation of this interference is produced mainly by the low order harmonics, can interfere with many bands coincide and FM radio, and regulatory agencies have been forced to place limits on the emission of electromagnetic radiation that is produced with electronic instruments and PC using clocks and generate unacceptable emissions....