26 May
2012
26 May
'12
3:28 p.m.
Great article in link. When you get down in the dirt, all the way down,
It takes good layout engineering to keep noise down and the signal over
the thermal and coupling noise.
I didn't know super insulators accumulated that much static/free
electrons, but it makes sense. It's more black art then RF design.
Must read.
Jim
Dave McGuire wrote:
On 05/26/2012 01:16 PM, Mouse wrote:
Check out this article. (watch for URL wrappage) This is a very
interesting read.
http://www.edn.com/article/520010-Design_femtoampere_circuits_with_low_leak…
I do a lot with electronic metrology; we have to be conscious of that
sort of thing, particularly thermal effects and cleanliness, all the
time in that world. It really is a whole different world of electronics.
-Dave
Just for
the lulz, yesterday I saw a current amplifier that works in
the order of FEMTOamps (!!!) and uses - gasp - 10 GIGAohms resistors
:oO
Um!
A femtoamp is only several thousand electrons per second (between 6241
and 6242, if the values I have at hand are correct). Isn't that, like,
the leakage current through an air gap?