Good point AudioGuru. I don't see how those simulations worked unless he used negative voltage for the negative supply. I originally did that on the circuit I posted above and it worked but it was confusing so I flipped the supply around and declared its voltage to be positive. That worked, too.
Sgt Wookie posted a link to a free LTSpice simulator and I downloaded it. After tinkering I caught on. It's wysiwyg so it's pretty easy. The drawback for me is that it has no transformers and no double transistor configuration for differential pairs so drawing them looks confusing. And without xformers, it's pretty limitted.
Sgt Wookie posted a link to a free LTSpice simulator and I downloaded it. After tinkering I caught on. It's wysiwyg so it's pretty easy. The drawback for me is that it has no transformers and no double transistor configuration for differential pairs so drawing them looks confusing. And without xformers, it's pretty limitted.