Study On Electromagnetic Radiation&electromagnetic Compatibility Of Computer Major Components

Computer as a data and information processing equipment, Information transmission and processing of which is in the form of electromagnetic signals. The special structure of the way computers work will inevitably electromagnetic radiation to space. This paper ,based on fundamental research of electromagnetic compatibility, determines the signal generation, trend, look for sources by a concrete analysis of the major components of Micro-computer. On this basis, actually measure the electromagnetic radiation of major components. Among them, the part of the LCD control circuit also conducted the simulation analysis. Verify the simulation results and actual measurements,then the results of theoretical analysis results were compared with the measured, analyzed and processed to grasp the major components of computer radiation mechanism.Through theoretical analysis and practical measurements, it treats some of the methods to reduce the computer electromagnetic leakage. Improve the micro-computer system electromagnetic compatibility by EMC shielding, filtering and grounding. Do some experimentation and testing to verify the effectiveness of these measures. Practical measures to be tested in accordance with the actual structure of machine design. Test results show that these measures are effective. Test data below the limited standard of the GB9254-2008 (idt CISPR 22:2006). "Information technology equipment and methods of measurement of radio disturbance limits.",greatly reduce the electromagnetic radiation of computer system, to achieve the desired objectives.