I am using LM6134B opamp and doing simple tests. Surprisingly, I found a strange behaviour, for which I am trying to find the reason. I am applying a ramp wave from 0 to VDD at the non-inverting input. I am connecting both VDD and GND. I am keeping both inverting terminal and output of the opamp open. In this set-up, when I increase non-inverting terminal voltage from 0 to VDD i see that the inverting terminal also results in 0 to VDD (more or less). I went through the data sheet (www.ti.com/.../getliterature.tsp and there is an internal block diagram in page 14. Can someone explain or convince me what's happening ?