摘要
数字系统中的△I噪声是一个重要而复杂的问题。随着数字系统向大规模、高集成度、高速度、低工作电压等方向发展,△I噪声已逐步成为PCB电磁辐射的主要来源,并成为影响系统EMC的重要因素之一。虽然抑制△I噪声一般需要从多方面着手,但通过PCB设计抑制△I噪声是有效的措施之一。如何通过PCB设计抑制△I噪声是一个亟待深入研究的问题。在对△I噪声的产生、特点、主要危害等研究的基础上,讨论了辐射干扰机理,重点结合PCB和EMC研究的新进展,研究了抑制△I噪声的PCB设计方法。对通过PCB设计抑制△I噪声的研究与应用具有指导作用。
The △I noise of digital systems is a important and complicated problem. With the developments of digital systems towards large scale, high integrity, high speed, low supply voltage, and so on,the △I noise is becoming a important source of radiated emission of PCB and the one of important factors influencing the EMC of digital systems.Although it is demanded to take multiple-measures,PCB design is the one of effective measures.Many problems on suppressing △I noise with PCB design are not resolved as yet. Based on the research results of the causes,special features,and main harmfulness of the △I noise,the mechanism of the radiated interference is discussed,and the PCB design techniques for suppressing △I noise are mainly studied considering the new research results of the PCB and EMC in this paper.This can be used for guiding the research and application of the the PCB design techniques for suppressing △I noise.
出处
《计算机测量与控制》
CSCD
2004年第11期1103-1106,共4页
Computer Measurement &Control
基金
河南省自然科学基金资助项目(0311012500)
