Inverting Schmitt Trigger was rigged up in the lab using uA 741. The values of R1 and R2 is taken as 10K and Vsat at 12 V and Vin at 1 V sinusoidal input.The oscillation from +Vsat to -Vsat occured at around at aroud 11.6 V input(increased from 1 V gradually) which is expected.
But when I increased the input more I noticed the positive part of the input was clipped a little (I guess it was some kind of loading at the input) due to which I noticed a small increase in the -Vsat part, just a small notch like.
I changed the op-amp but the effect was same.
What might be the reason for this effect. What test circuit will help me know more about this effect.