•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe™

Sitemap

Sherlock Ohms: The Case of the Common Ground

Sherlock Ohms: Looking for Common Ground - RF CafeYou have probably heard the old (erroneous) adage, "Ground is ground the world around." That might have been true prior to the advent of electronics, but it certainly isn't so anymore. Even in the vacuum tube days it wasn't so. Once frequencies get high enough that reactance rivals resistance for dominance, you can forget about simple grounding concepts for anything other than providing a measure of safety against electrical shock. This latest installment of EDN's Sherlock Ohms series is an account by John Lombard on his experience in, "Looking for Common Ground." He begins, "The term 'ground' should be used more carefully. In our equipment, we distinguish between ground and DC common for good reason. Ground refers to chassis or safety ground to take errant AC voltage to ground instead of through an operator's body..."






Posted  September 19, 2013
 
Custom Search
More than 10,000 searchable pages indexed.

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website