摘要
基于印刷电路板(PCB)上总线串扰的微分传输特性,提出了一种利用RC微分电路来减小传输线间串扰的方法.即在分析串扰抵消原理的基础上,在传输线终端利用RC微分电路对干扰线上接收到的信号进行微分,获得与受扰线上的远端串扰信号幅度相近、相位相反的微分信号;然后用微分信号抵消受扰线上的串扰信号,从而减小串扰.同时给出了串扰抵消微分电路中参数取值的近似计算公式.仿真与实验结果表明:文中方法能够使串扰峰值衰减10dB以上,与传统的从物理结构角度来减小串扰的方法相比,串扰减小的效果明显改善,且电路易于实现,代价较低.
In order to reduce the crosstalk between the transmission lines of printed circuit boards （ PCB）, a method using a RC derivative circuit is proposed based on the derivative-transmission characteristics of the crosstalk. In this method, first, by analyzing the crosstalk-cancellation principle, a RC derivative circuit at the end of the trans- mission line is employed to obtain the derivative of the signal received on the aggressor line, thus generating a de- rivative signal with approximate amplitude and opposite phase to the far-end crosstalk signal on the victim line. Then, the derivative signal is adopted to cancel the erosstalk signal, so that the crosstalk is reduced. Meanwhile, an approximate formula is presented for calculating the parameter value in this crosstalk-cancellation derivative cir- cuit. Simulated and experimental results show that the proposed method can attenuate the crosstalk peak by more than 10dB; and that, as compared with the traditional methods using physical structure to reduce crosstalk, the proposed method is of a greatly-improved cancellation effect and the corresponding circuit is easy to realize with a low cost.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第8期20-25,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61171039)
北京市优秀人才培养资助项目(2009D00500600003)
关键词
微分电路
串扰
传输线
印刷电路板
derivative circuit
crosstalk
transmission line
printed circuit boards
