From: John Woodgate
Subject: Re: PSU ripple current
Date: Thu, 16 Jan 2003 08:57:46 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Thu, 16 Jan 2003 10:24:58 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Phil Allison
wrote (in ) about 'PSU
ripple current', on Thu, 16 Jan 2003:
>"John Woodgate" wrote in message
>> I read in sci.electronics.design that Phil Allison
>> >> > This represents a 2% error and so is way less than the other
>> >> >approximations involved.
>> >> OK, in this case, but it isn't always so, IMHO, that ESR is very much
>> >> less than Xc.
>> > ** It would be so at 100 Hz.
>> No, I meant that different capacitors have different ratios of ESR to Xc
>> at a given frequency.
>> > Huh ? That contradicts your post.
>> If you say so.
> ** You are being too pithy again.
> The context here is 100 Hz - you dropped that without giving any
> ............... Phil
I wrote 'at a given frequency'; that includes 100 Hz and any other Hz. A
denial of my statement would be that all capacitors have the same ratio
of ESR to Xc at 100 Hz (or any other frequency).
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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