2010/12/31 Stefan Salewski <[1]m...@ssalewski.de> 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:m...@ssalewski.de 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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