Anybody know of a good logic layout application?

Answer 1

If I recall correctly, SPICE was an application that could do this sort of thing.

Perhaps Open Circuit Design.

I'm not an expert - I was a mechanical engineer, not electrical.

Answer 2

I'd like to mention a "fun" one that I've contributed source code to: Multimedia Logic http://www.softronix.com/logic.html

It has a lot of features and is good for educational purposes. It should easily handle circuits of the kind in your example. See http://www.dst-corp.com/james/virtualdigitalprojects/Main.asp for advanced examples.

Let me say, however, for serious non-educational work, you need something more professional.

Answer 3

I like TinyCAD. It does SPICE simulation as well as schematic capture.

Answer 4

If we're talking about the digital rather than the electron realm then you could go for Mentor Graphics or Cadence, but they cost £20000000000000000000000000000000000 each.

FYI: The term you're after is a http://en.wikipedia.org/wiki/Schematic%5Feditor . Now you know the term, knock yourself out googling for freeware ones. I've used one or two, but they were always terribly buggy compared to Cadence/Mentor (which themselves are terribly buggy, but in really expensive ways)

Unless you're talking about a tool that makes the metal mask layout? The only one of those I've ever seen is in Cadence iteslf. I doubt there's a freeware layout tool. If you find one, let us know :)

If you don't know what you mean, here are some pictures ot help. A metal layout tool looks like this: http://www.cs.ucr.edu/cs168/cs168-04win/lab2/lab2%5F2.jpg (That's a single invertor by the looks of it)

A schematic design tool looks like this: http://www.ema-eda.com/images/products.orcad.tech.pcblayout.gif

EDIT: You added your own picture, which clearly shows you mean a schematic editor :)