[time-nuts] Parallel voltage regulators

Don Collie donmer at woosh.co.nz
Sat Oct 27 00:01:01 EDT 2007

I`ve always wondered about noise from batteries - please tell us more 
Bruce!! [....also wondered about noise from the electrolytic action of 
aluminium, and tantalum electrolytic capacitors, and wondered if the 
reference bypass capacitor in a 723 should be a plastic dielectric type, 
rather than electrolytic].........
.......................................................Don C.

----- Original Message ----- 
From: "Bruce Griffiths" <bruce.griffiths at xtra.co.nz>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Saturday, October 27, 2007 1:57 PM
Subject: Re: [time-nuts] Parallel voltage regulators

> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+donmer=woosh.co.nz at febo.com RETRY
> Tom Clifton wrote:
>> 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...
>> Now if Sears only sold Diehard batteries that put out
>> 3.3 volts...
> Even batteries have noise, some types have more than others.
> Bruce
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