An eye diagram improvement method using simulation annealing algorithm

The authors introduce a novel passive method that can improve the performance of eye diagrams in high speed digital systems. In this paper, simulation annealing algorithm is adopted to select a good solution from a pool of candidate circuits, which are composed of a large variety of second-order all-pass filters. The proposed method not only can provide significant improvements in signal integrity but also can adapt to many kinds of non-ideal channels. Lastly, two examples are demonstrated to show the performance of the proposed method. Furthermore, to verify the results, simulated results using commercial tools are also shown, where good improvements on eye diagrams can be found.