[time-nuts] Anybody want a Thunderbolt power supply?

Charles Steinmetz csteinmetz at yandex.com
Wed Aug 31 17:38:04 EDT 2016

Chris wrote:

> Did you try any passive filters between the switchers and linear regulators?

Yes, I *always* use passive filters on the outputs of switching 
regulators.  As others have posted, it's not just a matter of the 
conducted noise on the supply rail -- switching noise propogates on the 
ground bus, and it is also radiated and coupled into downstream stages, 
including downstream power supply buses.  That is, it can very easily 
bypass whatever filtering you put in the direct conduction path.

Best regards.


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