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5. Mixed-mode circuit and system simulation
The challenge in mixed-mode simulation is not to simulate different types of electronic circuits, but to combine different algorithms into a unified structure and apply it to the entire circuit described at different levels of abstraction.
Event-based simulation has been developed primarily for digital circuit simulation, whereas analog circuit simulation is classically achieved by time-directed simulation. A mixed-mode simulator must solve the entire system using methods for handling nonlinear algebraic-differential equations, taking into account event tails for the digital parts.
Three basic approaches are possible:
the augmented approach in which an analog simulator is used to simulate digital circuits or a digital simulator is used for analog circuits;
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Mixed-mode circuit and system simulation
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Mentor Graphics (Afs, Eldo, Eldo-RF, ADiT, ADVance-MS, HyperLynx)
Keysight Technologies
Cadence (Spectre, Spectre-RF,...
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