Circuit design support apparatus and circuit design support method

A circuit design support apparatus comprising:

• a first specifying unit that specifies at least one first element by a circuit simulation, the first element being arranged on a substrate and being configured to generate negative potential lower than ground potential;
• a second specifying unit that specifies, by a circuit simulation, an amount of current of a noise current source that prevents at least one second element from meeting signal specifications, the second element being arranged in a peripheral area of the first element on the substrate, the amount of current of the noise current source being specified as a criterion of a current flowing from an electrode of the second element to the substrate due to a parasitic element formed between the first element and the second element, and the noise current source being connected to the electrode of the second element;
• a calculation unit that
• under a condition where a location of the second element has been shifted to one of a plurality of places, calculates a second element current flowing to the substrate from the electrode of the second element whose location has been shifted, and
• calculates a criterion violation rate for each of the plurality of places, the criterion violation rate being represented by a percentage of a difference between the criterion specified for the second element whose location has been shifted and the calculated second element current in relation to the criterion;
• and
• a display processing unit that displays, on a display, information indicating the calculated criterion violation rate such that the information is superimposed on a layout showing a positional relationship between the first element and the second element whose location has been shifted.