Shield circuit designing apparatus and shield circuit designing method

摘要

A cell selecting and connecting unit selects a type of cell adapted to drive a shield wire with a logical value corresponding to a logical value of at least one of inputs to a cell that drives a target wire that requires shielding. The cell selecting and connecting unit connects a cell of a selected type to the cell that drives the target wire so that an additional cell placing unit places the cell of the selected type. A shield generating unit generates a shielding wire connected to the placed cell along the target wire.