Jim,
Is this supply commercial and available for sale?  I have a project that
could use  quiet supplies.  Did you use a specific topology?  resonant mode,
for example?

Thanks,
Ed

On 6/25/04 you wrote:
We have achieved a small switching supply that has an input range of about 3
VDC to about 18 VDC with an output of plus and minus 5 AVDC @ ~200ma (each
leg).  And this with a noise figure of better than -140db.   Not easily
achieved, and not inexpensive, but doable.

But as a practical matter, your design is sufficient for most lab uses you
will probably run into in general work.   But if you have to have a very
quiet supply, figure on spending a few more bucks than this.

                                               Regards,

                                                 Jim

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