ALEXANDRIA, Va., June 16 -- United States Patent no. 12,657,363, issued on June 16, was assigned to Synopsys Inc. (Sunnyvale, Calif.).

"Determining aging effects for a circuit design" was invented by Wei-Kai Shih (Hsinchu City, Taiwan), Hsien-Han Cheng (Hsinchu City, Taiwan) and Li Ding (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system and method for performing circuit design analysis obtains a circuit design comprising cells. The cells are associated with cell types. Aging parameters of a core analytical model are determined for each of the cell types in the circuit design to generate a calibrated analytical model. Aging effects for the cells are determined based on the calibrated an...