Low frequency noise reducion ?

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carpenter

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I have voltage reference with noise 0.1Hz ≤ f ≤ 10Hz 2.4 μVp-p and need reduce this noise -25dB
Current is small about 10 - 20 uA

Can you advise how to do it?
 

That's pretty low to begin with, and I'd be suspicious about
ability-to-measure at present amplitude, let alone 100nV.
As far as "fixing" it, I got nuthin'. Although you might deal
with it downstream by oversampling and rejecting outliers,
or something. Provided it looks more like impulses than, say,
bistable / polystable RTN.
 

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