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最近以前,电子设备设计师一般不必考虑设备对 EMI/RFI干扰的敏感性,除非该设备是供军用的;军用设备必须确保即使在噪声极严重的环境中也能正常工作.与此相反,美国联邦通信委员会(FCC)只要求民用系统不与公共广播服务发生干扰.但是,在几年前欧共体(现在叫做欧洲联盟,简称 EU)就制定了与FCC的规定基本相同的辐射性和传导性发射限制,同时还提出各种严格的抗扰性要求.已经批准的抗扰性标准有静电放电(ESD)标准、辐射电磁场标准和高速电瞬变标准(参阅第40页插文“EMC规程”).目前增加的标准草案针对如下的各种干扰:浪涌,传导性RF,工频磁场,
Most recently, electronic equipment designers generally did not have to consider the sensitivity of equipment to EMI/RFI interference unless the equipment was for military use; military equipment must ensure that it works even in extremely noisy environments. In contrast, the United States The Federal Communications Commission (FCC) only requires civil systems not to interfere with public broadcasting services. However, a few years ago the European Community (now known as the European Union, EU) had established the same radiation and conduction as the FCC regulations. Sex Emissions Limitations, but also a variety of stringent immunity requirements. The approved immunity standards are electrostatic discharge (ESD) standards, radiated electromagnetic field standards, and high-speed electrical transients (see box “EMC regulations” on page 40). The current draft of the draft standard addresses the following types of interference: surges, conductive RF, power frequency magnetic fields,