I have a circuit which contains Xmega128a1U micro controller. I have ground and +3.3 V DC as supply.
how can I make a -3.3 V from this circuit ?
There is a op-amp which I want to buff a ac signal through it but as I connect it to 0 and +3.3 V , I lost negative part of my input AC signal.
I think if I connect op-amp to -3.3 V and +3.3 V this issue will be answered.
Thank you for your help
P.S. Op-amp is AD826 and it has BW covers my wave freq