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Old 25th September 2012, 07:57 PM   #7251
tvrgeek is offline tvrgeek  United States
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Originally Posted by DF96 View Post
Does anyone here use the quasi-static conservative field approximation method? Very useful for analysing circuits, and it is based on fundamental physics. Of course, I have been using it successfully for many years yet some of you have probably never even heard of it.
First time Google was totally stumped.
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Old 25th September 2012, 08:21 PM   #7252
bcarso is offline bcarso  United States
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Originally Posted by SY View Post
I prefer using Hartree-Fock methods with configuration interaction terms; that way, we really know where the electrons distribute themselves. That's far beyond most amateurs but it's what I use to win listening contests.
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Old 25th September 2012, 08:34 PM   #7253
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It is somewhat frustrating to give a hint to rational circuit design that has been out there for almost 40 years, yet got so much 'flack' for putting it out there. I am usually not as 'helpful' mostly because of the time and effort to either explain in my own words, a number of subtle design decisions, or be faced with scanning a reference and attempting to put it up. Also, there is a range of readers, some with PhD's in engineering and most others with much less, down to just amateurs. For its clarity, this Solomon article is a rather 'lucky' find, in my opinion.
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Old 25th September 2012, 09:00 PM   #7254
SY is offline SY  United States
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Originally Posted by bcarso View Post
Dave started it, I just picked up where he left off.

BTW, my first use of those resistors in series with CCS was in the late '70s, the Eisenson mod of Dynaco preamps. And it wasn't new then.
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Old 25th September 2012, 09:03 PM   #7255
a.wayne is offline a.wayne  United States
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Originally Posted by tvrgeek View Post
Now, you are going against the entire basis for patent trolls! I am surprised some idiot has not filed for a patent for using Ohm's law. Either of them. Our stupid patent office would probably give them one.

Apple got a patent on "sleek design" for crying out loud!
patent or copyright/trademark ...?
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Old 25th September 2012, 10:02 PM   #7256
SY is offline SY  United States
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Design patent. A different animal than a utility patent.
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Old 25th September 2012, 10:15 PM   #7257
DF96 is offline DF96  England
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Quote:
Originally Posted by tvrgeek
First time Google was totally stumped.
Ordinary people may call it Kirchoff's Voltage Law, but it arises from the conservative nature (zero 'curl', hence potential is meaningful) of the electric field in the quasi-static approximation (low frequency, so no changing magnetic fields) which is appropriate to circuit theory.

See how confusing it is to give an existing well-understood concept a new name? And in this case the name was even better related to the underlying physics than the usual name.
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Old 26th September 2012, 12:31 AM   #7258
popilin is offline popilin  Argentina
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Originally Posted by DF96 View Post
Ordinary people may call it Kirchoff's Voltage Law, but it arises from the conservative nature (zero 'curl', hence potential is meaningful) of the electric field in the quasi-static approximation (low frequency, so no changing magnetic fields) which is appropriate to circuit theory.

See how confusing it is to give an existing well-understood concept a new name? And in this case the name was even better related to the underlying physics than the usual name.
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Old 26th September 2012, 01:23 AM   #7259
tvrgeek is offline tvrgeek  United States
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Quote:
Originally Posted by DF96 View Post
Ordinary people may call it Kirchoff's Voltage Law, but it arises from the conservative nature (zero 'curl', hence potential is meaningful) of the electric field in the quasi-static approximation (low frequency, so no changing magnetic fields) which is appropriate to circuit theory.

See how confusing it is to give an existing well-understood concept a new name? And in this case the name was even better related to the underlying physics than the usual name.
I was lucky enough to catch James Burke giving a talk just the other day. He was describing our shift from "educated" to knowing more and more about less and less until you get to the point where no one understands you except yourself. I think that is when you get full professorship. He then points out many if not most of the great discoveries were not by the experts, but buy the more general educated who knew several experts.

Unfortunately he was too tired to take questions. He used a lot of energy in the talk and sad to say, not as young as he once was. I wanted to engage him in an implication he made about the next revolution. (as in agriculture, industrial, and he says next will be "plenty")

I have done pretty well being a jack of all trades, or at least of many. Not that I am ever going to make any great discoveries, but I most enjoy putting the pieces together I have gleaned from this thread.
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Old 26th September 2012, 06:01 AM   #7260
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until you get to the point where no one understands you except yourself...
...and he says next will be "plenty"
Ahhhh, I see.
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