[sdiy] Leaded Ferrite Bead vs. Inductivity

[Harry Bissell Jr]

Hi Gergo

You can use filter chokes instead of ferrite beads,
but
be careful to choose those that are 'lossy' as opposed
to high Q.  Usually the words "choke" rather than
"inductor" are used.

I use 100uH filter chokes and 100uF caps for DC supply
decoupling... but there are many places where you
really NEED a bead

H^) harry


--- Gergo.Palatinszky at nokia.com wrote:

> 
>  Hi,
> 
>  I'd like to ask about the ferrite beads. Here in
> Hungary it's very difficult to buy some...
> 
>  So th question(s) is(are)
> 
>  1. Possible to use inductivity insted of ferrite
> beads? (my guess is: yes)
> 
>  2. If Yes, what is the correct value (interval) of
> it (in mH / uH) (of course the right ansver can be
> the: it's depends the circuit behind, but is there
> any common sense?)
> 
>  3. What I can buy it capable for 100mA only, it's
> enough or not? ( I propose some of my modules need
> higher value, but I've never measured)
> 
> 
> Thanx
> 
> 
> br,
> 
>  Pala
> 
>