[time-nuts] Totally unrelated, but..

Bob Camp kb8tq at n1k.org
Wed Dec 7 18:53:18 EST 2016


You can indeed find regulators with noise densities that work out to be uV/sqrt(Hz) advertised as
“low noise”. Who knows how marketing justified making the claim other than “not as totally rotten
as our older part”. 


> On Dec 7, 2016, at 6:32 PM, Richard (Rick) Karlquist <richard at karlquist.com> wrote:
> On 12/7/2016 12:16 PM, Clint Jay wrote:
>> I was looking for a low noise regulator to power a log amp/detector earlier
>> this year and was rather surprised to find the 78xx regulators were
>> considerably better than many of the "low noise" devices.
> Are you kidding me?  Check out the Linear Technology LT3042 and
> LT3045 with 2 (yes, TWO) NANOVOLTS/root-Hz spot noise.  Orders of magnitude better than the 78XX introduced 45 years ago.
> Rick N6RK
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