A method to evaluate pessimistic errors in statistical timing analysis

摘要

First, a yield is calculated by employing conventional SSTA. Next, an independent LL set is determined, the independent LL set being a subset having sets of delay element sets that only include gates and nets not being shared by two or more paths. Next, a yield is calculated by employing SSTA while using only the independent LL set. Thereby, it is understood that the actual yield is between the yield obtained by employing the conventional SSTA and the yield obtained by employing the SSTA using only the independent LL set.