26 May
2012
26 May
'12
10:16 a.m.
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?
Femtoamps times gigaohms equals...microvolts. The noise shielding in
that device must be impressive.
Things I never saw in my life [...]
Me neither. I think the largest resistor I've ever seen had a blue
third band (and, IIRC, brown and black for the first two - 10 megs).
/~\ The ASCII Mouse
\ / Ribbon Campaign
X Against HTML mouse at rodents-montreal.org
/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B