Power an TL064CN OpAmp from USB?
A very simple rail splitter. From the datasheet of TL064 it seems maximum output source/sink current is only about 3 mA (to maintain 2.5 V output at 5 V supply).



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An option to increase output current would be to add a push pull output stage with an NPN and a PNP transistor pair, but that may likely introduce crossover distortion if not designed properly. Here is a very simple push pull output stage.



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