On Mon, Jan 12, 2009 at 3:00 PM, Joerg <joerg...@analogconsultants.com> wrote: > Mark Rages wrote: >> On Mon, Jan 12, 2009 at 1:36 PM, Joerg <joerg...@analogconsultants.com> >> wrote: >>> John Doty wrote: >>> >>> Ok, I'll try, it's been a long time since I tested it: >>> >>> Take the LM324 as an example. It is a chip with four opamps in there: >>> http://www.national.com/ds/LM/LM124.pdf >>> >>> When you place the first instantation it'll be pins 1,2,3, the next one >>> 5,6,7 and so on. But all are supplied via the common supply pins 4 and >>> 11. In gschem you only have two choices. Either you create a library >>> model that repeats those pins 4 and 11 visibly for all four >>> instantations or you create the library part with the power pins >>> detached where none of the instantations show power pins. This can be >>> practical for auto-connecting digital stuff to a VCC rail but it doesn't >>> work well in the analog world. Now you could also have pins 11 and 4 as >>> a separate "fifth" device. Anyhow, neither method looks professional, >>> neither is industry practice, and all make schematics more difficult to >>> understand for others. Especially for non-analog guys. >>> >> >> You can always use two symbols, one with power pins and one without. >> That's what I do. >> > > But if you do that, can you call the first one U12A and have power pins, > then next one U12B, then U12C and U12D without but so it sticks during > renumbering and also correctly netlists? When I tried that the refdeses > were messed up at the next renumbering. >
It netlists OK if the refdes's are the same. I leave the identifiers as "U1a U1b" etc, then strip the suffixes with a script during netlisting. I don't use automatic renumbering. Regards, Mark markra...@gmail -- Mark Rages, Engineer Midwest Telecine LLC markra...@midwesttelecine.com _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user