时钟电路辐射骚扰与扩频技术
Clocking-circuit Radiated Disturbance and Spread-spectrum
Technique
摘要 时钟电路的辐射骚扰是电子产品电磁辐射骚扰的一个重要根源,它不仅影响了产品的研发成本,也影响了产品的上市时间。文章针对非屏蔽塑料外壳设计的终端产品A、产品B在辐射发射测试中存在的问题,提出了采用扩频技术来抑制高频辐射骚扰的解决方案,并用实验结果证明了此方案是可行的。
关键词 电磁兼容;辐射骚扰;时钟电路;扩频技术
Abstract Electromagnetic radiated disturbance is an important problem for electronic
product due to clocking-circuit radiated emission, it not only influences design cost of
product and also influences time to market of product. The paper analyze the radiated
disturbance problem in electromagnetic radiated testing about unshielded enclosure
terminal product A and B, and give the specified solution plan to reduce the high-
frequency radiated disturbance through using spread-spectrum technique and this
experiment result prove that the plan is practicable.
Keyword electromagnetic compliance ;radiated disturbance ;clocking-circuit ;spread-spectrum technique
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