An Efficient Equivalent Circuit Model for the EMC Analysis of Power/Ground Noise

With the ever decreasing feature size and increasing operating frequency, the noise coupling inside the power-ground planes becomes more and more serious. We propose an efficient integral equation method to simulate such electromagnetic compatibility problem. With the help of the structural features of the power-ground planes, the integral equation is simplified to a two-dimensional equation. This greatly reduces the computing time and still gives a good accuracy. By discretizing the integral equation, the equivalent circuit model is derived for each power-ground pair. It is straightforward to combine the derived circuit model with other circuit models, such as the transmission lines models of the interconnects and the on-board lumped components, to perform the system-level signal integrity and power integrity simulations.