He's working on some IoT tiny consumer thing, on a flex substrate maybe.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Yeah, It's this case I'm thinking about. But, I've got a model now... breaking up the ground into current filaments... not high enough frequency for top and bottom to disconnect. (Still, as I draw pictures.. Think Faraday and field lines, I get lower energy, by confining the fields.) see below at DC...
Is that true if we're talking about a plane conductor, vs a solid? For a 2-D thing like a ground plane there should be a different relation... longer I'd guess... 1/f?
George H.
Oh Snap, I wanted to say it's this transition, from DC "star ground" to RF ground plane that interests me the most. I've got one data point that says RF is >1MHz, maybe even 100kHz. GH
For an infinite block of ground "plane", of course it's any frequency (it goes deeper and deeper as you approach DC, but lim-->0 isn't zero-zero).
True, edge effect could be a different function, because the geometry is different (it's got... more sides?). I don't think the units will work out any other way than diffusion though.
Exercise for the student: solve the field equations for foil. :^)
Tim
-- Seven Transistor Labs, LLC Electrical Engineering Consultation and Contract Design Website: http://seventransistorlabs.com
Interesting and related fact: copper traces make shitty shunt resistors, because they're primarily inductive above ~10kHz, making them wholly useless for SMPS. (And anyway, the tempco is as bad as Rds(on) of a FET, so who cares.)
Tim
-- Seven Transistor Labs, LLC Electrical Engineering Consultation and Contract Design Website: http://seventransistorlabs.com
Agree about tempco, but a copper trace might have a few milliohms of resistance and a few nH of inductance, which should be usable. A surface-mount milliohm resistor will have more inductance than a trace of the same footprint.
A downstream RC will flatten out either.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
What does it mean "to read squat"? Google isn't very helpful here.
Best regards, Piotr
basically means they don't even look at it
dictionary says: squat = Slang, A small or worthless amount
-Lasse
That's a bit euphemistic. While not actually obscene, it isn't a polite exp ression, as you'll have gathered from the context. ;)
Cheers
Phil Hobbs
Den fredag den 15. april 2016 kl. 13.11.55 UTC+2 skrev Phil Hobbs:
xpression, as you'll have gathered from the context. ;)
yeh, I guess in most uses it is a replacement for "shit"
-Lasse
Hi Oppie. I found what you worked in air pollution research. How can I contact with you? I'm trying to build pollen detection devic and need for some advice. Sorry for off topic.
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