整合3DEM的Virtuoso在片上电感仿真中的应用

Using Cadence Virtuoso 3DEM for on-chip inductor extraction

目前大部分电磁仿真软件在仿真片上电感时,需要从工艺库的文件中手动提取需要的相关参数;并且仿真环境的建立也比较繁琐,仿真时间也较长,这会大大降低电感的品质因数和面积的优化效率。集成了3DEM的Virtuoso可以直接选取整个版图的一部分导入仿真,而不必提取整块电感版图;并且根据工艺库文件自动生成需要的相关参数,设置仿真环境;仿真速度根据算法的优化,可以快速得到精确度很高的结果。本文将通过一个片上电感的仿真过程,介绍软件的具体应用方法。

Accurate on- chip inductor modeling is essential in these applications. But to get accurate inductor model, in most electromagnetic simulation software, it is need to extract technology parameters from foundry technology library file manually. So it is relatively complicated to establish simulation environment and simulation time is long. This greatly reduces the efficiency for optimization of circuit performance and layout area. Virtuoso with 3DEM- integrated can select layout to do model extraction directly,without the step to input technology parameters manually. It can generate technology parameter according to foundry provided process library file and set up the simulation environment. With optimized extract algorithm, simulation speed has obviously improved and results are quite accurate. In this paper, we demonstrate our application of using 3DEM to extract accurate on- chip spiral inductor in high speed serial link design.