US Patent 9710579 Using smart timing models for gate level timing simulation

A system and method for simulating the timing of an integrated circuit design using abstract timing models. An abstract or smart timing model is created as a model of a design component or block having partial timing that includes the timing for the boundary or interface logic but removes timing for internal registers. The smart timing model may additionally preserve the timing for asynchronous or multi-cycle paths, or add interconnect delays for certain internal elements, to ensure accurate timing.