The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> Circuit Simulators >> Free Circuit simulator??
https://designers-guide.org/forum/YaBB.pl?num=1513877671

Message started by shubhamchawla on Dec 21^st, 2017, 9:34am

Title: Free Circuit simulator??
Post by shubhamchawla on Dec 21^st, 2017, 9:34am

Hi!
I have done an internship at Analog Devices where I was able to use cadence virtuoso etc. Now, I am at my university where there is no proper LAB or licenses or anybody caring to even contact Cadence for University Licence. I wish to publish papers on Bandgap and LDO design in next 6 months but have no tools. Please suggest me tools by which I can report data on research papers. I tried LTSpice but where do I find model files for processes like 180nm and less? Step by step tutorial would be very helpful on how to setup my environment where I can write testbenches and all.

Title: Re: Free Circuit simulator??
Post by Tako on Jan 3^rd, 2018, 2:03pm

See whether you'll find something interesting here: http://www.mtcmos.com/ic-simulators/ .

Nevertheless, I recommend LTspice as a free tool. You'll find models of transistors, for example in books as Razavi and Baker and others.

Title: Re: Free Circuit simulator??
Post by Geoffrey_Coram on Jan 4^th, 2018, 7:45am

Tako wrote on Jan 3^rd, 2018, 2:03pm:

You'll find models of transistors, for example in books as Razavi and Baker and others.

The original poster wanted models for 180nm or smaller, which one is not likely to find in books.

But LTspice uses a syntax that's very similar to HSpice, and may in fact read HSpice model files if they use mostly "standard" Spice syntax. I think I've seen 180nm (0.18u) model libraries - maybe from MOSIS? - available on the web, without requiring an NDA or contract from a foundry.

Title: Re: Free Circuit simulator??
Post by Tako on Jan 4^th, 2018, 9:43am

Geoffrey_Coram wrote on Jan 4^th, 2018, 7:45am:

Tako wrote on Jan 3^rd, 2018, 2:03pm:

You'll find models of transistors, for example in books as Razavi and Baker and others.

The original poster wanted models for 180nm or smaller, which one is not likely to find in books.

Baker has 50 nm.