Re: [cosmacelf] Re: When Tantalum capacitors aren't enough.
- On 05/22/2013 02:16 PM, joshbensadon wrote:
> Hi Lee,The inductance in an electrolytic capacitor is almost exclusively the
> Thanks for the added info. I always knew about electrolytics acting
> like inductor coils, not hard to see when it's a bunch of foil coiled
> up. But I never thought of tantalum or ceramic acting that way. I
> guess they are like politicians. If the price/frequency is high
> enough, they will look and act the other way.
result of the connections to the capacitor and not its internal
construction. There was a nice series of articles on capacitors, mostly
from the viewpoint of their utility for audio circuits, in Electronics
World by Cyril Bateman.
With a through hole ceramic capacitor, there is more inductance in the
connections to the capacitor than in the capacitor. This is why lead
lengths for decoupling capacitors need to be kept short. (I just Googled
up a paper on testing SMD capacitors and the shorting plug for a factory
built HP SMD test fixture had more inductance than the capacitors.)
David W. Schultz
Returned for Regrooving
- --- In email@example.com, "David W. Schultz" <david.schultz@...> wrote:
> > not hard to see when it's a bunch of foil coiledVery cool, I did not know that! I guess that they have more inductance because of the larger diameter of the leads? Which makes sense because inductors require that metalic mass to store the magnetism.
> The inductance in an electrolytic capacitor is almost exclusively the
> result of the connections to the capacitor and not its internal