Don't know about real analog squares, probably way more complex,
but attached is my simplistic approach: a soft-clipped triangle wave 
gr,
Tim

2012/2/6 Pierre Massat <pimassat@gmail.com>
Dear List,

I need a square wave to use as an LFO in a ring mod patch. Though i could simply use [expr~ $v1>0.5], I m wondering if I could get a smoother square wave. I tried to use a bandlimited square wave, but I don't have enough harmonics and the top of the wave isn't flat enough. Incidentally, what do analog square waves from old synths look like? Anyway, I think i want a square wave with no jumps between 0 and 1.

Cheers!

Pierre.

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