以晶振作为骚扰源的医用电气设备辐射发射超标研究  

Study on the Radiation Emission Exceeding Standard of the Medical Electrical Equipment of Disturbance from the Crystal Oscillator

作　　者：张敏 公翠娟 刘萌 刘美丽 朱成科 李庆雨 Zhang Min;Gong Cuijuan;Liu Meng;Liu Meili;Zhu Chengke;Li Qingyu(Department of Electromagnetic Compatibility Room,Shandong Institute of Medical Device and Pharmaceutical Packaging Inspection,Jinan Shandong 250101,China;Medical Device Inspection Department,Shandong Center for Food and Drug Evaluation&Inspection,Jinan Shandong 250014,China)

机构地区：[1]山东省医疗器械和药品包装检验研究院电磁兼容室,山东济南250101 [2]山东省食品药品审评查验中心医疗器械检查科,山东济南250014

出　　处：《医疗装备》2022年第1期54-56,59,共4页Medical Equipment

摘　　要：晶振是一种最为常见的高频时钟信号噪声源,由于其产生的振荡频率及其各次谐波引起辐射发射超过规定限值的现象非常普遍,导致医用电气设备通过该项测试的概率较低。该研究通过对晶振引起辐射发射超标的原因进行排查,对整改案例进行分析、总结,提出了晶振在印刷电路板(PCB)上的常用设计规范及整改措施。Crystal oscillator is the most common type of high frequency clock signal noise.The phenomenon of the radiation exceeding the regulation limit caused by the oscillation frequency and every harmonic caused by crystal oscillator is very common,so that the pass rate of the radiation test for medical electrical equipment is low.Through investigating the causes of radiation emission exceeding standard from crystal oscillator,this study analyzed and summarized the rectification examples,and put forward common design specifications and rectification measures of crystal oscillator on the printed circuit board(PCB).

关 键 词：辐射发射 晶振 印刷电路板 设计规范 整改措施 

分 类 号：TN751[电子电信—电路与系统]