Efficient method for the decomposition and resynthesis of speed-independent circuits

This paper presents a time and area efficient method for the decomposition and resynthesis of speed-independent circuits from the signal transition graph (STG) specification. Our method first investigates the hazard-free decomposition of all high-fanin gates without adding any signals to the original specification. For those gates that can not be hazard-freely decomposed, we propose new signal-adding methods for resynthesis. Our decomposition and resynthesis techniques have been fully automated and applied to several asynchronous benchmarks. Compared with previous work, our method lowers the run time by 1-2 orders to magnitude, and the implementation area is also reduced.