I'm trying to use a 0.5V signal as a source.
I've wired a TL072CN as follow:
- VCC+ to 11V
- VCC- to GND
- OUT2 to IN2-
- IN2+ to 0.5V
The thing is when I measure the voltage on OUT2 I get 10V where I am expecting 0.5V.
I made some test and for different values of IN2+ I get the values under:
- IN2+ = 0.5V : OUT2 = 10V
- IN2+ = 1.0V : OUT2 = 1.3V
- IN2+ = 3.0V : OUT2 = 3V
- IN2+ = 5.0V : OUT2 = 5V
Do you have any idea where this effect could come from?
Edit: the schematic (I didn't know you could do this)