Dec 19, 2005 #1 J jutek Full Member level 4 Joined Oct 21, 2005 Messages 211 Helped 6 Reputation 12 Reaction score 1 Trophy points 1,298 Activity points 3,140 hello i'm doing the opamp model and i need help with slew rate modeling. I did like http://www.ecircuitcenter.com/OpModels/Opmodel2/opmodel2.htm but as an input stage i used cmos differential amplifier with pmos inputs. SR should be SR=Itot/C where Itot equals to current of the diff amp current source. But this doesn't act as should. Of course a little SR exists, but only a little not compatible with calculations. Itot=193u C=0.193n so SR should be 1V/us shouldn't be? how to improve this model? regards
hello i'm doing the opamp model and i need help with slew rate modeling. I did like http://www.ecircuitcenter.com/OpModels/Opmodel2/opmodel2.htm but as an input stage i used cmos differential amplifier with pmos inputs. SR should be SR=Itot/C where Itot equals to current of the diff amp current source. But this doesn't act as should. Of course a little SR exists, but only a little not compatible with calculations. Itot=193u C=0.193n so SR should be 1V/us shouldn't be? how to improve this model? regards