Message	Date	From	Subject
168	2006-10-05 15:26:59	topossibilities	3 very good articles (understanding resistors, avoiding ground loop
EDN on-line has 3 very good articles that I though some of you would be interested in. 1. Five questions about resistors Understanding this ubiquitous part can help you avoid common circuit problems. The resistor is one of the simpler electronic components. Engineers seldom examine resistor characteristics until there's a resistor-related problem with a circuit design. You can probably resolve 90% of these problems after answering these five key questions: * How much voltage can I put on the resistor? * What will be the temperature of the resistor in my circuit? * How much surge will the resistor withstand? * What makes a resistor fail? * How much change in resistance can I expect? The link for the full article is: http://www.edn.com/article/CA6372835.html?nid=2431&rid=1354052530 2. Circulating currents...a.k.a. Ground loops. Understanding how to avoid or minimize the effects of circulating currents can make your designs more robust. Every engineer should know the techniques for neutralizing this insidious phenomenon. Article discussion includes avoiding ground loops in back-panes/PCBs, digital, power supply, audio, RF and mobile applications. The link for the full article is: http://www.edn.com/article/CA6372822.html?nid=2431&rid=1354052530#circulating Modeling skin effect in Spice 3. Skin effect causes increased losses as frequency increases. It also causes changes in signal velocity, degrading signal fidelity, especially the eye opening of high-speed data signals on long signal paths on pc boards and backplanes. The link for the full article is: http://www.edn.com/article/CA6372836.html?nid=2431&rid=1354052530 Ed, W1AAZ Lots of books, parts, kits and test equipment for sale at: http://mysite.verizon.net/topossibilities/ If you don't see what you need, check back (adding items weekly) __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
169	2006-10-06 16:55:30	Roy J. Tellason	Re: 3 very good articles (understanding resistors, avoiding ground
On Thursday 05 October 2006 06:26 pm, topossibilities wrote: > EDN on-line has 3 very good articles that I though some of you would be > interested in. Interesting stuff, there... <...> > Lots of books, parts, kits and test equipment for sale at: > > http://mysite.verizon.net/topossibilities/ You too, eh? I have a bunch of stuff sitting at a similar URL: http://mysite.verizon.net/rtellason/w4s.html -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

EDN on-line has 3 very good articles that I though some of you would be
interested in.

1. Five questions about resistors

Understanding this ubiquitous part can help you avoid common circuit problems.

The resistor is one of the simpler electronic components. Engineers seldom
examine resistor characteristics until there's a resistor-related problem with
a circuit design. You can probably resolve 90% of these problems after
answering these five key questions:

* How much voltage can I put on the resistor?
* What will be the temperature of the resistor in my circuit?
* How much surge will the resistor withstand?
* What makes a resistor fail?
* How much change in resistance can I expect?

The link for the full article is:

http://www.edn.com/article/CA6372835.html?nid=2431&rid=1354052530

2. Circulating currents...a.k.a. Ground loops.

Understanding how to avoid or minimize the effects of circulating currents can
make your designs more robust. Every engineer should know the techniques for
neutralizing this insidious phenomenon. Article discussion includes avoiding
ground loops in back-panes/PCBs, digital, power supply, audio, RF and mobile
applications.

The link for the full article is:

http://www.edn.com/article/CA6372822.html?nid=2431&rid=1354052530#circulating

Modeling skin effect in Spice

3. Skin effect causes increased losses as frequency increases. It also causes
changes in signal velocity, degrading signal fidelity, especially the eye
opening of high-speed data signals on long signal paths on pc boards and
backplanes.

The link for the full article is:

http://www.edn.com/article/CA6372836.html?nid=2431&rid=1354052530

Ed, W1AAZ

Lots of books, parts, kits and test equipment for sale at:

http://mysite.verizon.net/topossibilities/

If you don't see what you need, check back (adding items weekly)

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