FastSpice Simulators: Advantages, Challenges, and the Way Forward
Introduction: FastSpice simulators are powerful simulation tools for the pre- and post-layout verification of complex semiconductor designs such as DRAM, flash, SRAM, and transistor-level SoCs. They offer a significant increase in simulation speed, typically around 2X faster compared to traditional SPICE simulators. However, this speed comes at the cost of accuracy and reliability, with deviations of approximately 5-10% when compared to SPICE simulators. FastSpice simulators achieve their speed enhancements through various techniques, including specialized solvers, pre-processing of linear systems, partitioning, RC reduction/optimization, multi-rate time step control, look-up table models, and array optimization. Popular FastSpice Simulators: Some of the popular FastSpice simulators in the market today include Synopsis' FineSim-Pro and PrimeSim XA, as well as Cadence's Spectre X and Spectre FX. These simulators can also be utilized for mixed-mode circuit simulations by combin...