The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Phil Allison"
Subject: Re: PSU ripple current
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Wed, 15 Jan 2003 08:50:23 +1100
NNTP-Posting-Date: Wed, 15 Jan 2003 08:39:48 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"John Woodgate" wrote in message
> I read in sci.electronics.design that Phil Allison
> wrote (in ) about 'PSU
> ripple current', on Tue, 14 Jan 2003:
> >BTW If the ripple voltage were a really a symmetrical triangle wave
> >by differentiation the ripple current in the cap *must* be a square wave
> >value equal to the DC load current.
> > The normal ripple wave is a sawtooth with steep rise and slower
> >fall and this differentiates to a pluse wave with a mark space ratio of
> >about 3:1. The average of this wave must be zero for the cap to stay at
> >the same voltage so the charge current must be 3 times the discharge -
> >+3 amps for 2.5mS followed by - 1 amp for 7.5mS.
> > This would have an rms value of 1.73 amps.
> He keeps doing this: super stuff. But WHY can't he refuse to get
> involved in flame wars?
** The reason is simple: I will not tolerate being publicly abused.
So I let folk know that.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup