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From: John Woodgate
Subject: Re: An interesting little prob.
Date: Wed, 30 Oct 2002 12:25:42 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Wed, 30 Oct 2002 14:36:48 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Tony Williams
wrote (in <firstname.lastname@example.org.
uk>) about 'An interesting little prob.', on Wed, 30 Oct 2002:
>The V-controlled Shunt-reg isn't sorted yet though. It has
> to be not less than (say) 1 megohm shunt resistance when
> not regulating
I don't suppose that it's you major problem, but 1 Mohm seems awfully
high for a 20 V compliance voltage. Do you really need that degree of
'constancy' of your current source?
> and has to be programmable to as low a
> voltage as practical.... less than 1v would be nice.
The combination of 1 Mohm and 1 V may be a real PITA. That's why I
suggest that you might settle for less.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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