摘要
当用波形渐进估值 ( AWE)法分析传输线电导为很小或近似为零的情况时 ,导数不存在或难于收敛 .基于多芯片组件 ( MCM)和印刷电路板 ( PCB)中介质相对损耗很小 ,即互连线电导很小或近似为零 ,通过修正 AWE法 ,用于模拟电导 G很小或近似为零的有耗传输线 ,这种方法是基于对传播常数函数有理近似 ,从而得到更简单形式的频域传输线电报方程 ,然后在频域通过模式匹配、Pade有理逼近 ,得到传递函数响应 ,最后结合递归卷积运算获取节点时域响应 .应用实例表明 ,这种方法具有较高精度 ,是进行高速 MCM。
The relative loss of the dielectric in MCM and PCB is generally very small, namely, the conductance is very small or approaching zero. A modified asymptotic waveform evaluation technique was proposed to simulate the loss transmission line with very small conductance. When the propagation function is based on proper approximation, very simple telegram's equations in the frequency domain are obtained. The derivation is also very simple and easy. Then transfer response can be obtained by moment matching and Pade approximation. At last, time responses of all nodes are achieved with recursive convolution formulation. Examples indicate that the modified method can give high accuracy comparing with the results of the mature Vhihas software. This method can supply a useful tool for the design of highspeed PCB's, MCM's circuits.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2000年第6期741-743,共3页
Journal of Shanghai Jiaotong University
关键词
高速数字集成电路
互连线
时域响应
修正AWE法
high speed digital integrated circuits
transmission line
asymptotic waveform evaluation (AWE)
Pade approximation
