A Multiple-Line Double Multirate Shooting Technique for the Simulation of Heterogeneous RF Circuits

This paper describes a computer-aided design tool especially conceived for the efficient time-domain simulation of strongly nonlinear mixed digital, baseband, and RF circuits operating in multiple time scales. The proposed numerical method is based on a 3-D envelope oriented technique over an innovative multiple-line double multirate shooting strategy, and is tested with an illustrative circuit example. Significant gains in computation speed over previous methods recently proposed for the simulation of this category of circuits are reported, as the technique was tailored to take advantage of the circuits´ heterogeneity and stimulus time-rate disparity.