Free Circuit Simulator Software

My list of Free Circuit Simulator Software

• Multisim Free Version
• Many types of simulators from Linear Technology
• LTspice IV (Switchercad) is free and powerful. It features all IC chips from Linear Technology. SwitcherCAD™ III is a fully functional Spice III simulator with enhancements and models for easing the simulation of switching regulators. This Spice is a high performance circuit simulator, integrated waveform viewer, which also includes schematic capture. Our enhancements to Spice have made simulating switching regulators extremely fast compared to normal Spice simulators. Included in this download are Spice, Macro Models for 80% of Linear Technology's switching regulators and over 200 op amp models. Furthermore, resistors, transistors and MOSFET models are included as part of this package. With this Spice simulation, viewing of the waveforms of most switching regulators can be achieved in a few minutes on a high performance PC. Also, full circuits using op amps or transistors can easily be simulated.
• Intusoft ICAP4 Demos : A lot of limitations

Multisim Analog Devices Edition 10.0 Free Download

I have found a good and free circuit simulator,Multisim Analog Devices Edition 10.0. As you may know that Multisim is a famous electronics circuit simulation software (circuit simulator). It's based on Electronics Workbench from the same company. I have found the free version (not the cracked version) of Multisim by chance and you may not find it on the National Instruments website. It comes with a lot of measurement tools and it's very easy to use. I use it to simulate various analog circuits. The image below shows the screen shot of the simulation of DC-Boost Converter (12V to 150V step up).


Not only analog circuit, but it also simulates digital circuit as one may call it 'Mixed-Mode Simulator'.
Some features and limitations:

• Build simulated component evaluation circuits to quickly assess behavior of over 800 Analog Devices operational amplifiers, switches and voltage references
• Examine the unit under test in the intended circuit topology with up to 25 components
• Use built-in instruments and analyses including oscilloscopes and worst-case analysis
• Swap components easily to pinpoint best design options
• Link to the Analog Devices Design Center for more online evaluation tools
• Instantly access product pages and datasheets of each Analog Devices component
• Upgrade to a full edition of NI Multisim to complete designs and transfer to board layout with NI Ultiboard

Please follow the link for Free Download Multisim 183MB