摘要
研究结果表明,在L与RC比值较小时,阶跃响应的上升时间基本上由RC的乘积决定,电感对电路的影响可以忽略,互连线采用RC模型与RLC模型结果应无多大差别。在L与RC比值较大时,阶跃响应曲线出现振荡,此时使用RC模型需满足工作频率低于RC模型的“上限使用频率;当工作频率超过RC模型的“上限使用频率”时,互连线的模型就必须采用RLC模型。RC模型的“上限使用频率”仅与互连线长度有关:fmax106(Hz·m)。
Simulation of extremely high order interconnecting model is conducted by means of MATLAB. The rising time of step response mainly depends on the product of R and C. When the ratio of L and RC is small, the influence of inductance on the circuit can be neglected such that the difference between RC model and RLC model vanishes. The oscillation in step curve occurs when the ratio of L and RC is large. Therefore, it must be satisfied that working frequency can not be higher than the upper limit for the RC interconnecting model. Otherwise, RLC model must be adopted in interconnect modeling. The maximum frequency for RC interconnection is normally only related with the length of interconnection, i.e., fmax106/l.
出处
《电路与系统学报》
CSCD
2004年第1期139-141,共3页
Journal of Circuits and Systems
基金
美国自然科学基金资助项目(NSF: CCR 0098275)
