I've been doing alot of research into creating a bi-polar supply from a single one and ran into quite alot of options. I have one extra requirement, the load will not be balanced across the supply. The dual supply will be powering a headphone amp but the positive rail will also be used to power a microcontroller.
My first design failed because I didnt consider this, the rails became very unbalanced with the extra load.
So I need a design that will source enough current and is immune to loading effects (op amp buffer?). At this point I'd like to use a single AC-AC wallwart rather than a chassis mount transformer. The only way I would consider a transformer is if its a small board mount. It's a headphone amp, I cant have it take up a crazy amount of space.
Thanks for any ideas
My first design failed because I didnt consider this, the rails became very unbalanced with the extra load.
So I need a design that will source enough current and is immune to loading effects (op amp buffer?). At this point I'd like to use a single AC-AC wallwart rather than a chassis mount transformer. The only way I would consider a transformer is if its a small board mount. It's a headphone amp, I cant have it take up a crazy amount of space.
Thanks for any ideas
Or use a rail splitter http://docs-europe.electrocomponents.com/webdocs/00b8/0900766b800b853b.pdf
and a separate 7905 for the micro-controller.
vac
and a separate 7905 for the micro-controller.
vac
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