Thanks. This opamp need a high power supply to work in your circuit (10v and -10v). If I use an opamp to get a 1.2v output the top rail power supply is at least 1.2v right? But now I only have a -0.6v(bottom rail), 0.6v(top rail) power supply. I think you still confused my question.
OK let me clear it. My problem is that now I have a power supply vcc and vss they are 0.6v and -0.6v(10v and -10v power supply in your diagram). Now I want this power supply changed to be 1.2v to ground.