Multisim features a comprehensive suite of SPICE analyses for examining circuit behavior. These analyses range from the basic to sophisticated. Each analysis helps you to obtain valuable information such as the effects of component tolerances and sensitivities. For each analysis you need to set settings that will inform Multisim exactly what to analyze, and how.
Multisim simplifies the procedure for an advanced analysis by providing a configuration window. This abstracts away the complexities associated with SPICE syntax and configuration of an analysis. With this window you merely need to specify the parameter values and output nodes of interest.
This tutorial is part of the SPICE Analysis Fundamentals Series
. Each tutorial in this series provides you with step-by-step instructions on how to configure and run the different SPICE analyses available in Multisim.
In Multisim you have the ability to add expressions into analyses. The analysis tools in Multisim provide a sophisticated manner in which to study the characteristics of a circuit. For example, in the Transient Analysis
window shown in Figure 1, the Output
tab displays variables describing node voltages and branch currents in the circuit. These can all be outputted to the Grapher View
during the simulation and analysis process.
There are times, however, when you might want to take these variables and combine them into expressions, such as power, to evaluate important characteristics of the circuit. In Multisim this is done easily through the analysis options. In the following example you will perform the simple steps needed to create an expression while performing Transient Analysis on a RF Amplifier circuit.
Figure 1. Transient Analysis window.