Patent ID: 7398497
Filing Date: 2008-07-08
Classification: G06F

Abstract:
1. An electronic circuit designing method for designing an electronic circuit by CAD, comprising the steps of: (a) automatically generating design constraints with respect to the electronic circuit based on general layout and wiring information and at least one of user reguirements defined by a user and user resources defined by the user, and setting initial values of the design constraints; (b) making an analysis, using an analyzing tool, by changing parameter values of the generated design constraints in a predetermined range that is input, so as to enlarge or reduce a search range of a solution space of the initial values of the design constraints satisfying user requirements, said analyzing tool carrying out at least one of a signal integrity analysis, a radio wave analysis, a thermal analysis, and a cost analysis; and (c) automatically enlarging or reducing the search range of the solution space of the initial values of the design constraints by automatically changing the parameter values of the generated design constraints depending on said analysis, based on device layout constraint definitions including at least one of definitions related to a device layout prohibited region and a movable region of each device, so as to generate the design constraints in a range where circuit layout and wiring are possible by taking into consideration the device layout prohibited region and the movable region of each device.