Delay fault modelling/simulation using VHDL-AMS in multi-Vdd systems

With the growing density of very large scale integrated (VLSI) circuits, traditional digital fault simulation is no longer a viable option. This is because of analogue-like behaviour in digital circuits. The need for fast fault simulation is one of the main requirements in test pattern generation. The trade off between accurate simulations at transistor level, as in SPICE and fast simulation at gate level using a Hardware Descriptive Language (HDL) can be achieved by using behavioural modelling languages such as VHDL-AMS. In this paper, we have demonstrated that behavioural fault simulation for resistive faults can produce fast and accurate results.