A novel detailed routing algorithm with exact matching constraint for analog and mixed signal circuits

In analog and mixed signal designs, exact matching requirement is critical for correct functionality of analog devices. However, due to the excessive complexity, it is difficult to consider exact matching constraint in detailed routing stage. This paper presents a novel gridless detailed routing algorithm, which efficiently obtains the optimized detailed routing solutions for a given set of nets with exact matching constraints. The gridless routing algorithm is based on an efficient non-uniform grid model, which enables the obstacles avoidance. To verify the effectiveness of the gridless routing algorithm, a grid routing algorithm and a modified exact matching routing algorithm from [5] are also implemented. Experimental results show significant improvements of the proposed gridless routing algorithm over the other two algorithms in both QOR and runtime.