Hey, thanks a lot!

I'm surprised that they did the exact experiment
I was thinking of trying...

...but I'm even more amazed that you found it!

(You must have one heckuva search engine.)

thanks again!

Jack






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                                                                   Subject
             Please respond to         Re: [DC] Return Current Path vs.
                "(Designers            Frequency
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Jack,

Here's a link to an app note on the subject I just found from Analog
Devices...

http://www.analog.com/en/cList/0,2880,773%255F%255F43,00.html

See app note AN-345

Cheers!


Bill Brooks - KG6VVP
PCB Design Engineer , C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
e-mail:[log in to unmask]
http://www.dtwc.com
http://pcbwizards.com



-----Original Message-----
From: Jack C. Olson [mailto:[log in to unmask]]
Sent: Thursday, December 02, 2004 10:55 AM
To: [log in to unmask]
Subject: [DC] Return Current Path vs. Frequency

Return Current Path vs. Frequency

-=-=-=-
Easy question:

Imagine a "U"-shaped trace above a solid ground plane,
with a connection at each end.

Inject a signal through the "U", and vary the frequency.

At what frequency will you see the return current
follow the shape of the U rather than the shortest path?

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