Mixed-level simulation techniques are widely used in VLSI designs for verification and test evaluation. In this paper we indicate how to perform mixed-level simulation on structured MOS designs using the Yorktown Simulation Engine (YSE), a hardware simulator developed at IBM. On the YSE, simulation can be done at the functional, gate, and transistor levels. The design specification used by the YSE is well suited for mixed-level simulation, particularly with regard to interfacing the different levels. We apply our techniques to an nMOS design to show the important features of our approach.
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