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General Technical InformationVishay RoedersteinDocument Number 26529To contact us: 04-Sep-023 RADIO INTERFERENCE SUPPRESSION1. Origin and Spreading of Interference:There are two main sources of radio interference: Devices, which due to their construction produce RFenergy. These include generators for use in industry,medicine and science, as well as oscillators, radioand TV receivers etc. Devices, which produce a wide spectrum offrequencies, due to rapid variations in electricalcurrent intensity. These include devices with switchingcomponents, thyristors, triacs, commutators from source to receiver is spread in three ways:alonwiringby coupling, andby radiationTo frequencies of 30 MHz approximately, interference isspread mainly along the installed electrical wiring. In thisrange inductive and capacitive coupling also occurs betweenthe wiring and other metal parts of the devices acting assupports of interference higher than 30 MHz are spread by radiationsince interference source dimensions and terminal wiringare in order of size to the wave length of the radiatedinterference.
General Technical Information Vishay Roederstein www.vishay.com To contact us: RFI@Vishay.com Document Number 26529 4 Revision 04-Sep-02 3. Suppression …
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