> I'm looking for a +/-5 V power supply.  I'd like to be able to
> run it off a
> 12 V
> battery, but at this point, even AC is an option.
>
> No problem, you're saying.  Dozens, pick one.  Here's the problem:  the
> circuit
> is EXTREMELY sensitive to supply noise.  Right now we're using a $2000 lab
> supply, which has <2 mV ripple.  It works.  I have managed to make a 5 mV
> ripple regulator, but it still isn't good enough.

        Umm, I think the most important detail you left out is current
requirements, <2mV ripple is easy if all you need is 1mA! :) TTYL

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