摘要
以一个简单的PCB地电平面为例,通过理论计算与SigrityPowerSI仿真参照比对的方式,分析谐振的原理以及Z参数仿真结果与谐振频率的对应关系,并进一步提出在考虑激励源对谐振影响的情况下,VRM应采用电压源等效,受电IC应采用电流源等效的激励源模型才能得到正确的仿真结果。
This articlc introduces PCB power-ground resonance theol7 and discusses on the relationship between Z simulated parameter and resonance frequency, hased on the comparison of theory calculation and simulation in Sigrity PowerSl via one simple example. Additionally, considering about the impact of excitation source impedance, VRM should be modeled as voltage source and drink IC should be modeled as current source to get right simulation resuhs.
出处
《安全与电磁兼容》
2012年第6期85-88,91,共5页
Safety & EMC
