A high disadvantage of LTspice is its proprietary code base which is licensed by Linear Technology. Highlight of LTspice is much fast simulation of switching regulators with enhanced SPICE (compared to normal SPICE simulators).LTspice gives access to over 200 op amp models, transistor models, MOSFET models etc. This simulation software is considered as one of the best freeware available. LTspice is a free circuit simulation tool from Linear Technology corporation. LTSpice – is a widely popular SPICE simulator from Linear. This circuit building software give access to switches, linear IC and digital IC, FET, Transistors, relays, displays, signal generators, SCR’s, opto isolators, photo diodes, semiconductors, motors etc. This SPICE simulation software provides 4000 devices on its student version which is 1/3 of the pro version. You can just signup and use the software, you can even try it without a signup but to download/save what you made you have to have an account which is ofcourse free.ĬircuitLogix – this student version software from CircuitLogix enables you to perform analog, digital and mixed mode circuit analysis and simulation. Developers have incorporated spice compatible model for MOSFET, BJT and Diode.ĮasyEDA – EasyEDA is another free software that doesn’t require downloading. Known widely as GNU Circuit analysis package, this linux based circuit simulator performs various circuit analysis functions as dc and transient analysis, ac analysis etc. GnuCap – is another open source project, developed as a general purpose circuit simulator.

As its a collaborative project you can suggest improvement of the circuit simulator and be a part of the development team. Ngspice is a part of gEDA project which is growing every day with suggestions from its users, development from its contributors, fixing bugs and approaching perfection. NgSpice is developed by a collective effort from its users and its code is based on 3 open source software packages:- known as:- Spice3f5, Cider and Xspice. NgSpice – one of the popular and widely used free, open source circuit simulator from Sourceforge. Free and Open source circuit simulator software list:.

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