Modelling abstraction-the highs and lows of mixed mode simulation

摘要

The paper focuses on the different types of mixed mode simulationnthat are available today and their use within the electronics designnenvironment. It explains the benefits of verifying a design, which cannbe achieved by combining the high level abstraction of digital andnanalogue models using behavioural languages with lower levels ofnmodelling abstractions like SPICE primitives or digital modellingnlanguages. It focuses on the different problems that can be encounterednwhilst performing mixed mode simulation including the handling ofndigital unknowns, synchronisation between analogue and digitalnsimulation engines and the handling of different digital technologiesnlike CMOS and TTL. Today's electronic designers need mixed modensimulation to handle varying complexities of analogue and digitalncircuitry. The paper suggests different solutions, through the use ofnanalogue versions of digital models, to `C' models of analoguencomponents that are capable of running under a digital simulationnenvironment