zero
impossible
Re: impedance
Mar 13, 2011
24 Replies
Grounded.
with a bit of + feedback
Sorry way too many words... I'm left with,
feedback
imaginary
Superconductor!
Inductance!
John
Really really big inductance in superconducting thin films.
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Phil Hobbs
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
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That's cool. Thanks.
John
On a sunny day (Mon, 14 Mar 2011 11:36:34 +1000) it happened David Eather wrote in :
Exactly.
Wrong. Super-conductors have zero resistance. It's difficult to have less than 10nH of inductance, as Larkin has indicated.
-- Bill Sloman, Nijmegen
Less than 10 nH inductors are easy. Buy them from Digikey.
John
her
But you have to keep the inductive loop compact, which poses it own problems.
-- Bill Sloman, Nijmegen
:
I hadn't noticed any serious problems. We stock, and use, inductors down to 1.6 nH.
John
On a sunny day (Mon, 14 Mar 2011 06:34:08 -0700 (PDT)) it happened Bill Sloman wrote in :
Actually the OP, it was a test posting, and the current idea was a series tuned LC ciruit. Whatever your limited imagination made of it I am not responsible for.
On a sunny day (Mon, 14 Mar 2011 07:11:25 -0700) it happened John Larkin wrote in :
You can make those yourself too:-)
:
PCB traces and IC metalization make nice low-L inductors. But they are hard to tune, so only make sense for really high volume production where a you have either very good e/m simulation tools, or don't mind a few design iterations.
I've seen wire bonds used as nanohenry inductors and t-coils.
John
Is this the same as "Ground Zero" ?
Aha! Imaginary.
Damm!!
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