In Reply to: Re: two mosfet added to counter slew rate posted by Jason on 09/01/03 at 12:14 AM:
This is becoming a puzzle, but I think you are correct, if current flows thru Q3 it has to also go thru Q5 and Q11. Therefore: Id11=Ibias+Id12+Id13. I don't know how to compute Id13. Since Id4=Id11 and Id5=Id13+Id4 then Id5=Ibias+Id12+2*Id13.
Calculating the current thru Q6: Id3=Id11 and Id6=Id3+Id12-2*Ib
Since both Id6 and Id5 contain Id13, I guess one could say it is immaterial and leave it out of the equation?