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From: John Woodgate
Subject: Re: LM317 or 7808 is better performance for 9V output ?
Date: Wed, 11 Dec 2002 13:56:32 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Wed, 11 Dec 2002 15:45:15 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Mike Monett wrote
(in <3DF7505B.4DF@Spam.Bots>) about 'LM317 or 7808 is better performance
for 9V output ?', on Wed, 11 Dec 2002:
> I'm sorry I didn't include your favorite prefilter circuit.
> Certainly this would help reduce ripple, but it would not affect the
> regulator noise.
It's not clear to me how much noise passes *through* the regulator from
the raw supply (and I mean broadband noise) and how much is generated in
the regulator itself.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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