[time-nuts] measuring noise of power supplies (was: For those that insist on using switching power supplies)
attila at kinali.ch
Tue Oct 18 05:27:05 EDT 2016
On Fri, 14 Oct 2016 22:25:55 -0500
David <davidwhess at gmail.com> wrote:
> I have done this and it works great; the breakpoint between the
> chopper amplifier and the low noise amplifier can be adjusted to
> combine the wideband noise from the low noise amplifier and the 1/f
> noise and drift of the chopper amplifier.
> Jim Williams wrote a couple of different application notes where this
> was used with both integrated and discrete amplifiers.
Yes, there are several appnotes and papers that list this method.
But I am not aware of any noise measurement below 0.1Hz for such
an amplifier setup.
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