Power supply circuit design system and power supply circuit design method

摘要

The power supply circuit design system of the present invention derives power supply voltage fluctuation characteristics that are characteristics of voltage fluctuation in a semiconductor integrated circuit based on design information of a power supply circuit that connects a semiconductor integrated circuit mounted on a substrate and other components. A power supply voltage fluctuation deriving unit, a power supply circuit, a power supply voltage fluctuation condition that is a condition for allowing power supply voltage fluctuation characteristics, a determination reference database including a change guideline for at least one of a circuit structure or an operation of a semiconductor integrated circuit, and a power supply voltage Compare the fluctuation characteristics with the power fluctuation conditions, and determine whether the power voltage fluctuation characteristics satisfy the power fluctuation conditions.If the power voltage fluctuation characteristics do not satisfy the power fluctuation conditions, follow the change guidelines. At least one of the structure and operation of the semiconductor integrated circuit is changed, and the changed semiconductor integrated circuit design information is Comprising a circuit structure changing means for outputting to the voltage variation deriving means changes the pointer is characterized in that with no resizing of the semiconductor integrated circuit.