I want to drive an op amp with dual supply using only a (9V) battery.

I'm thinking it can be made by having 9V at the +supply, 0V at the -supply and then connecting the ground reference to 4.5V? But would that really work? Would that really be the same as having an actual dual supply?

 

Its possible use a 'spare' OPA to create a virtual ground for +/-4/5V from a 9V supply.

Are you amplifying DC or AC signals.?

 

Its possible use a 'spare' OPA to create a virtual ground for +/-4/5V from a 9V supply.

How?

Are you amplifying DC or AC signals.?

The op amp will be used as a Wien bridge oscillator, so that means the input signal is DC and the output signal is AC.

 

hi
Look here for simple examples of
Simple Buffered Virtual Ground Circuits

http://tangentsoft.net/elec/vgrounds.html
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