The digital-to-analog (D/A) bridge maps digital logic values to a voltage such that it can be interpreted by analog simulation. In this article we will discuss these basic hybrid devices and how Multisim applies them in mixed-mode circuits. Therefore, to allow these two separate simulation technologies to communicate with one another we require special hybrid devices named bridges. However, event-driven digital devices have ports that are described by one of several logic states. Traditional SPICE-based devices are characterized by voltages and currents measured across ports. Finally, we will describe various digital simulation scenarios to enable you to better translate simulation data and trouble-shoot circuits.īefore discussing how co-simulation works in Multisim, we must first build a better understanding of the fundamentals of analog and digital devices and how they interact in a SPICE simulation.
After gaining understanding of the bridge, we can explore how NI Multisim defines various analog and digital models and how this relates to co-simulation results. This article introduces the basic structure of SPICE and XPSPICE-based co-simulation through a detailed explanation of a primitive bridge interface. These tasks include incorporating bridges that translate analog signals to digital and vice-versa. NI Multisim provides an intuitive environment, where the complex tasks required to successfully simulate analog and digital circuitry is automatically accomplished. NI Multisim adds to the versatility of SPICE by incorporating a mixed-mode simulator, allowing fast simulation of both analog and digital components together. Over the years, many enhancements and additions to SPICE have extended its functionality and range of applicability. SPICE simulation is the de facto standard for analog circuit simulation.
Circuit simulation is widely regarded as a critical step in the design flow.
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