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This module provides a brief introduction to simulating circuits using the SPICE in National Instruments Multisim. Multisim is fully featured SPICE schematic capture and simulation tool used for circuit design, simulation, and in combination with Ultiboard for layout of custom PCBs.

Simulation overview

While a good design naturally follows from quality schematics, truly great designs can made with the help ofsimulation. Multisim provides powerful simulation capabilities and features which are simply unavailable in other EDA packages.

Simulating a design can result in fewer design iterations and less chance of errors in the prototype stage ofproduct development. When a design is simulated at the front end of the design process, the number of design cycles can besignificantly reduced.

In addition to a world-class SPICE simulator, Multisim also includes XSPICE simulation, enabling fast simulationof digital other components.

Patented co-simulation techniques allow designers to simulate VHDL modeled components along with the restof a circuit. With MultiMCU, certain microcontrollers can be simulated in the very same mixed-mode environment. MultiMCU is notavailable for all versions of Multisim.

Using the interactive simulator

To begin a simulation, ensure that the circuit has all the necessary prerequisites. All circuits must include aground reference, and a source. Once the circuit is ready for simulation, click the Run / Stop Simulation button

Run/Stop Simulation Button
or press F5. An interactive circuit simulation will begin.

The settings that are used for interactive simulation can be viewed and modified by selectingSimulate/Interactive Simulation Settings.Figure 1 below illustrates some of the settings available for interactive simulation. Thedefault end time for the simulation is 1e+30 seconds, or around 3.17e+30 billion years. By default time steps will be generatedautomatically.

Interactive Simulation Settings

To view results of this simulation, the measurement probe

The Measurement Probe
can be used dynamically. Simply click on the probe icon and the mouse cursor will turn into a probe. The mouse can then bemoved over any net to view the following metrics:

  • Voltage (instantaneous, peak-to-peak, RMS, and DC).
  • Frequency.

Virtual instruments can also display simulation results. Virtual instruments are covered later in thissection.

Multisim also provides more traditional SPICE analyses, which are run through the Grapher/Analyses List toolbarbutton,

Grapher/Analyses List toolbar button
or by selecting Simulate/Analyses. Analyses are described in greater detail later in this section.

Handling simulation errors

Sooner or later, even the most experienced SPICE users will run into a SPICE simulation error. Multisimincludes a simulation advisor to help discover and fix the source of troubling errors.

When an error message appears such as the one in Figure 5, click the Adviser button to access the availablehelp.

Simulation Error Log Dialog Box
Simulation Advisor

Two of the most often encountered errors are timestep errors, and singular matrix errors. below provides themost common solutions to these simulation errors.

Common Solutions to Simulation Errors

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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Source:  OpenStax, Introduction to multisim schematic capture and spice simulation. OpenStax CNX. Sep 26, 2006 Download for free at http://cnx.org/content/col10369/1.3
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