[time-nuts] Parallel voltage regulators

Magnus Danielson magnus at rubidium.dyndns.org
Sat Oct 27 06:57:11 EDT 2007


From: Tom Clifton <kc0vsj at yahoo.com>
Subject: Re: [time-nuts] Parallel voltage regulators
Date: Fri, 26 Oct 2007 17:19:45 -0700 (PDT)
Message-ID: <944892.78524.qm at web37004.mail.mud.yahoo.com>

> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+magnus=rubidium.dyndns.org at febo.com RETRY
> 
> This has been a fascinating and educational thread!  I
> have always been aware of noise coming from switching
> regulators - just have Argo or Speclab look at your
> laptop's sound card with "no input" signal and there
> is plenty to look at until you go to battery power.
> 
> I had never considered diode switching noise in linear
> supplies, nor birdies from an assortment of logic
> devices - though I am a believer in healthy
> distribution of bypass capacitors...

They are sharp and unsteady oscillation is common, even on an old analogue
synthesizer for instance. You can reduce it by putting bypass caps over the
rectifying diodes.

Cheers,
Magnus



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