SPICE Simulation Fundamentals



The National Instruments SPICE Simulation Fundamentals Series is your free resource on the Internet for learning about circuit simulation. The series is a set of tutorials and information on SPICE simulation, OrCAD pSPICE simulation, SPICE modeling, and other concepts in circuit simulation.

The series is divided among a number of in-depth detailed articles that offer HOW TO information on the important concepts and details of SPICE simulation.

Circuit simulation is an important part of any design process. By simulating your circuits, you can detect errors early in the process, and avoid costly and time-consuming prototype reworking. You can also easily swap components to evaluate designs with varying bills of materials (BOMs). 

NI Multisim is an example of an easy-to-use, powerful, and flexible SPICE simulation environment that allows educators to teach circuit theory, and engineers to quickly design topologies.

SPICE is the dominant technology for simulating power circuits. However, it can be more challenging to simulate power circuits than low-power analog circuitry: the quality of the component models and the accuracy of the transient time simulation of the SPICE engine. In Multisim, we account for both of these aspects to guarantee a best-in-class simulation and analysis of power electronics circuits. Learn more about power electronics simulation in Multisim.


SPICE Simulation Overview


SPICE Simulation OverviewSPICE Simulation Overview
The basics of SPICE simulation. What is SPICE simulation? Learn about netlists, SPICE models, and speed versus accuracy in SPICE simulation.


SPICE Simulation Models


SPICE Simulation ModelsSPICE Simulation Models
One of the most fundamental facets of SPICE simulation is a set of accurate models of the components used in any given circuit. There are literally millions of different SPICE models available. Learn about the basics of a SPICE model, model makers, and where to look for vendor-specific models of components.


Basic SPICE Simulation Model Parameters


Basic SPICE Simulation Model ParametersBasic SPICE Simulation Model Parameters
Intrinsic to SPICE is the ability to model basic and more advanced single element real and ideal components. Read this tutorial to learn the basics about the various models that are available in SPICE.


SPICE Simulation Options


SPICE Simulation OptionsSPICE Simulation Options
Simulations can be accurate because of the quality of the SPICE models used and the simulation options. Parameters such as relative tolerance (RELTOL) and timestep can have a drastic affect on the results produced by the SPICE simulator. This article gives you detailed information on a number of the many options available and what effect changing them will produce.


SPICE Simulation Control Statements


SPICE Simulation Control StatementsSPICE Simulation Control Statements
At the heart of every industry standard SPICE simulator is a text-based core. Power users of SPICE simulation take advantage of their knowledge to achieve the greatest control over exactly how simulations proceed. This article gives an overview of the control statements that engage the SPICE engine.


SPICE Simulation Source Type and Parameters


SPICE Simulation Source Type and ParametersSPICE Simulation Source Type and Parameters
Proper SPICE simulation will always require some type of stimulus or source. Native to SPICE are a number of basic and more complex sources such as Pulse voltages, Exponential voltages, Sine waves, and Piece-wise linear sources. This article gives detailed information on the syntax of these source elements in SPICE.


SPICE Simulation User Guide


SPICE Simulation User GuideSPICE Simulation User Guide
The SPICE User Guide is an essential compendium of knowledge on the syntax and details of SPICE simulation. Use this link to access your copy of the SPICE User Guide.