kai-martin knaak wrote: > John Doty wrote: > >> http://www.gedasymbols.org/user/john_doty/models/opamp/ >> >> Have fun! Feedback welcome. > > Thanks! > Such simple models are what it takes as a starting point. > I will try the models for a second stab toward simulation rather than with > ltspice. Will report my milage on the list and/or add to the simulation > page on the geda wiki.
No mileage, yet, but I looked at the model file. The CA3080 is simulated from transistor level. Part of the magic is the definition of the transistor parameters. The comment says you applied "Pspice/Parts to the specs of a CA3096 array" to get the values of the transistors. Does this mean, that Pspice has a way to guess the value of transistors from the specs of a whole circuit? How would one go about to get the equivalent for, say, the abundant OP07? A note on the "dirty" opamp model, CA3080. Unfortunately, this particular component is not only obsolete but has a non standard configuration. Pin 5 is "amplifier bias input" and needs to be connected to some proper value. (correct me, if I am wrong) This is less then ideal for distribution in a getting-started selection of models. Ideally the chosen component would be widely used and be pin compatible to a maximum number of other opamps. ---<)kaimartin(>--- -- Kai-Martin Knaak Öffentlicher PGP-Schlüssel: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x6C0B9F53 _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
