On Jun 5, 2006, at 5:28 AM, Stuart Brorson wrote:
Here are possible things you can do:
* Redraw the symbol. Yes, it's a PITA, but part of doing designs is
drawing symbols.
* If the symbol has implied power pins (net= attribute), then just
stick your decoupling cap on the same schematic sheet and attach it to
your power net and GND. To attach to the power net, just draw a net
from the cap, and then give the net a netname= attribute.
Another way is to draw a separate symbol for the power and ground
pins, and then give it the same refdes as the powerless symbol. Now
you can have a perfectly explicit drawing of power distribution, but
avoid cluttering the signal flow drawing with that stuff. This works
for most gnetlist back ends, but unfortunately not for spice-sdb.
Stuart, can this be fixed? Your spice-sdb gives the obscure "Invalid
wanted_pin passed to gnet-nets [unknown]" error when it sees a
duplicate refdes. The reason I ask is that I'm retrofitting my chip
design to have explicit power distribution (ah, the joy of changing
customer requirements ;-).
John Doty Noqsi Aerospace, Ltd.
jpd@xxxxxxxxxxxxx