Patent ID: 6578184
Filing Date: 2003-06-10
Classification: G06F

Abstract:
A method of designing a circuit comprising the steps of:inputting information on a schematic representing a circuit comprising a plurality of elements and a plurality of lines that interconnects respective terminals of the plurality of elements, and a value of a power supply voltage fed through a particular one of the plurality of lines that interconnects the respective terminals of the plurality of elements; detecting a path through which an electrical current flows in the circuit based on the inputted information on the schematic; extracting routing nets each of which comprises a route through which an electrical current flows from among routing nets each comprising at least one line that interconnects terminals of ones of the plurality of elements in electrical connecting relationship from the inputted information on the schematic; separating each of the extracted routing nets into a first subnet comprising a line through which an electrical current flows and a second subnet through which no electrical current flows; and creating a constraint condition by which a route is determined for each of said first and second subnets.