基于等效电路模型的频变互连线网络并行仿真技术

A Parallel Simulation Technique of Interconnect Networks with Frequency-Dependent Parameters Based on Equivalent Circuit Models

针对超大规模集成电路中复杂互连线网络的快速仿真需求,提出并实现了含频变分布参数互连线网络的并行仿真技术.建立频变互连线的等效传输线模型,并借助多端口等效模型将互连线部分与其他电路单元相分离,实现互连线仿真的并行化.互连线采用时域有限差分方法求解,而除去互连线的其他电路则在集成电路模型程序(SPICE)中进行仿真,两者在同一时间步内交换数据.基于该技术开发出并行仿真软件FdSPICE.数值实验证明,该软件计算精度较高,可有效提高复杂互连线网络的仿真效率.

A parallel algorithm was presented to satisfy the demand of efficient simulation of complex inter- connect networks with frequency-dependent parameters. By means of the equivalent multi-port models, the interconnects are separated from other circuit elements, and thus makes the parallel simulation feasible. The finite-difference time-domain method is utilized for the solution of interconnects while other circuit ele- ments are simulated in the simulation program with integrated circuit emphasis（SPICE）environment, and their simulation results are exchanged in every time step. Based on the proposed technique, a program named FdSPICE was developed for parallel simulation of interconnect networks. The numerical examples show that accurate results are obtained by this program and the simulation efficiency is improved signifi- cantly.