Hi Rich, Not stable near zero what? I don't understand your comment. Near zero volts output? Sean On Tue, May 11, 2010 at 3:56 PM, Rich wrote: > That is true, Russell. =A0In fact most op amps configured as unity gain a= re > not stable near zero. =A0That is why there are special very high open loop > gain devices called buffers or followers, like the LM 310, for example. > > -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist