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针对高速数字系统的信号完整性问题,以WCDMA频谱监测平台的设计为例,分析了串扰的产生机理和对信号完整性的影响,给出感性串扰与容性串扰的分析公式,在此基础上采用HyperLynx仿真工具对串扰进行了仿真,仿真结果表明:串扰的大小与影响串扰相关因素有关。根据不同仿真条件下的仿真结果归纳出几种减小串扰的方法,为实际的电路设计和PCB制作提供了理论依据。
Aiming at the problem of signal integrity of high-speed digital system, taking the design of WCDMA spectrum monitoring platform as an example, the generation mechanism of crosstalk and its influence on signal integrity are analyzed. The analytical formulas of perceptual crosstalk and capacitive crosstalk are given The crosstalk was simulated by HyperLynx simulation tool. The simulation results show that the crosstalk size is related to the factors affecting crosstalk. According to the simulation results under different simulation conditions, several methods to reduce the crosstalk are summarized, which provides the theoretical basis for the actual circuit design and PCB fabrication.