The NP2 relational model has been widely accepted as one' of the extensions of Codd's relational model which better meet the requirements imposed by the so-called non-standard database applications. The manners in which the NF2 relational model has been used so far are called standard ways of using the model. In this paper some nOD-standard ways to use the NF2 relation model are presented. Thei...

A simplified method for characterization of standard library cells based on the linear delay model is presented in this paper. The linear model is chosen as it allows rapid characterization with a modest number of simulations, while achieving acceptable accuracy. All the parameters of cell delays are defined as 50%-to-50% delays, as distinguished from 50%-to-threshold or threshold-to-50% often ...