Analog routing considering min-area constraint

With the advancement of analog and mixed-signal (AMS) circuits, analog routing is attracting more and more concern. This paper presents a new analog gridless routing method fully considering different design rule constraints, including wire and via width/spacing constraints, especially the minimum area constraint. A modified A* searching algorithm is presented to search the multi-layer routing path that satisfies the minimum area constraint for each routing layer. Experimental results are promising and show that the presented analog router successfully finds valid routing paths for all the testcases without any min-area design rule violations.