I'm just wondering, if an op-amp is connected in a positive feedback configuration, should the output not saturate immediately? Here is an example circuit i made in pspice along with its input/output curve (V12 has amp of 3v). http://img689.imageshack.us/img689/1286/posfeedback.png [Broken] As you can see, it is behaving exactly like it would if i connected it in a non inverting, negative feedback configuration. I don't want to draw up a non-inverting -ve feedback circuit but I've simulated that and the input/output behaviour is exactly the same with same gain. Am i misunderstanding the concept of positive feedback? Thanks.