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Analog Angle

(Under)standing Your Ground

Bill Schweber
TheMeasurementBlues
TheMeasurementBlues
4/17/2013 11:28:09 PM
User Rank
Teacher
No such thing
Bruce Archambeault says ground doesn't really exist.

The 'Ground' Myth

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Brad Albing
Brad Albing
2/12/2013 4:23:07 PM
User Rank
Blogger
Re: Ground, neutral, and just plain common.
You need to be careful with questions like that. You'll pro'ly weed out about 95% of your job applicants. Which might be OK - you could argue that you don't want them anyway. But if you then find that you are running out of applicants that are even remotely qualified, you may need to change your tack. Maybe hire the semi-clever ones and educate them as needed.

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Bill_Jaffa
Bill_Jaffa
2/7/2013 10:09:36 PM
User Rank
Blogger
Re: Ground, neutral, and just plain common.
Perhaps one of the questions you could ask a job interviewee, to see how much of their knowledge is "academic" vs "real world" is what "ground"--and what's the difference between one in theory and in practice?

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WKetel
WKetel
2/7/2013 9:35:48 PM
User Rank
Artist
Ground, neutral, and just plain common.
Back in elementary electronics, course 1, ground was a zero impedance connection back to the power source return connection point. That was very convenient, but certainly misleading. Probably that is where a more correct explanation should begin. Explaining that it is usually a relatively lower impedance connection to the power supply return would be a good start. 

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Brian Dotson
Brian Dotson
2/6/2013 8:20:09 PM
User Rank
Blogger
Re: (Under)standing Your Ground
Bill,

This is a great blog for reminding me of the limitations of the Consumer Electronic products that I design. When I worked in the pro audio industry, we typically built a product in a steel rack package, and we used a three-wire power entry connector, with an earth ground connection on that third prong.

However, the home audio world is built around two-wire AC connections. Furthermore, our power cord of choice, has what we refer to (for want of a better term) as a "figure eight" connector making the cord connection into the product. This means that you can't even know which of the two AC conductors is hot and which is neutral. One certainly has to think differently about double insulation for safety, and also, about how to dissipate unplanned energy coming in from ESD discharges.

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Brad Albing
Brad Albing
2/4/2013 6:30:45 PM
User Rank
Blogger
Re: "ground" puns and jokes
Bill, I'm tellin' ya this is too serious a topic for us to be looping around with some bad puns; so I shall bypass them. I for one will remain on a higher plane and keep my feet firmly on the ground. Or earth as the call it in England.

And no capacitor jokes either. Too politically reactive. So, no admittance to capacitor jokes, OK?

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Bill_Jaffa
Bill_Jaffa
2/4/2013 5:26:17 PM
User Rank
Blogger
"ground" puns and jokes
My blog is about serious design issue, but we don't have to be serious all the time! What are some of the puns, word plays, and jokes around the word "ground" that you know? Do you have afavorite? Is there one which makes you moan?

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