hi,

I've seen a few diagrams on the net on how to get virtual ground, one example was with the two 9V batteries.:

Would it be possible to replace those batteries with two DC/DC buck converter modules (potentially needing to modify the circuit), e.g. based on the LM2596 IC?

2. Are there 1 to 1 transformers with a center tap? I have a few 220V AC/AC transformers with 16V 1A output, was wondering if I could use one of the above described transformers to get a split supply.

3. I have a 7660 voltage converter chip, but it can only supply 10mA on the output. Not sure if I could connect some power transistors to it to increase the output capacity?

4. Is an op-amp+transistor solution a better alternative, e.g.: http://www.redcircuits.com/Page114.htm

thanks!

 

Sounds like you need a CT secondary, a 16vac secondary will give you ~22vdc.
Max.

 

The 2596 is not an isolated-output converter (the 0V line goes straight through), so cannot be used as you suggest.

 

hi,

I've seen a few diagrams on the net on how to get virtual ground, one example was with the two 9V batteries.:

Would it be possible to replace those batteries with two DC/DC buck converter modules (potentially needing to modify the circuit), e.g. based on the LM2596 IC?

2. Are there 1 to 1 transformers with a center tap? I have a few 220V AC/AC transformers with 16V 1A output, was wondering if I could use one of the above described transformers to get a split supply.

3. I have a 7660 voltage converter chip, but it can only supply 10mA on the output. Not sure if I could connect some power transistors to it to increase the output capacity?

4. Is an op-amp+transistor solution a better alternative, e.g.: http://www.redcircuits.com/Page114.htm

thanks!

TI rail splitters are pretty good, I've used them...http://www.ti.com/product/tle2426

Peter