Mark Rages wrote: > 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. >
Ok, I have to, most of my schematic have north of 500 part. next to impossible not to auto-renumber. That may be the reason why this blew up on me. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user