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Re: gEDA-user: European symbols?
2010/12/31 Stefan Salewski <[1]mail@xxxxxxxxxxxx>
But the main advantage of that shape may be, that complicated
devices
like
[2]http://upload.wikimedia.org/wikipedia/commons/thumb/5/56/74LS192_
Symbol.png/220px-74LS192_Symbol.png
as used in some (german) VHDL/FPGA textbooks are available.
I have no idea where to get a list of all that complicated pictures.
Hi, everyone.
Oh, those! I recognize them now! Those are often called "IEEE
standard" logic symbols in the US. The only place I've ever seen them
used is Texas Instruments data sheets, though I can see their appeal.
They are a rich language for expressing logic.
TI has a nice app note explaining the symbology and history of the
standard. Apparently the IEEE and IEC have nearly-entirely-compatible
versions of the standard. The IEEE one is IEEE 91-1984.
[3]http://focus.ti.com/lit/ml/sdyz001a/sdyz001a.pdf
With the library discussion of the last few weeks, I was wondering
whether there would be a demand for this style of logic symbol in
gschem.
Stephen
References
1. mailto:mail@xxxxxxxxxxxx
2. http://upload.wikimedia.org/wikipedia/commons/thumb/5/56/74LS192_Symbol.png/220px-74LS192_Symbol.png
3. http://focus.ti.com/lit/ml/sdyz001a/sdyz001a.pdf
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