On Sun, Jan 30, 2011 at 12:47 AM, RussellMc wrote: > The LM324 is a modern miracle. > But it's far from the answer in many more demanding situations. > Expect the LM324 to do a fine job for you often. > But, understand its limitations. > > If you don't understand the effects or the general nature of input > offset voltage and input bias currents in an opamp then leave the > circuit you are working on there at the altar and go and understand > these utter basics of op-ampery. > > If or when you do understand these limitations of an opamp, try > plugging typical value from the data sheet into the circuit (on > paper), calculate the result and see what you get. If you have trouble > with this procedure, then ask good questions and people will help. If > you instead ask 'what if i used this', what about xxx, will the LM324 > saturate?, etc without first plugging some numbers in yourself, then > you will find the learning process very slow. > > You're right. I read and understand what input bias current and offset voltage are now. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .