ferrite bead as low pass filter search

[levnu]

Hi

i'm looking for a ferrite bead that will block 1-20 Mhz
frequancies and pass all lower ones

is it possible ?

can someone to advice me for one specific?

Best regards,
Arye

---------- Post added at 10:00 ---------- Previous post was at 09:33 ----------

block around 10 Mhz is good enough

 

[Phytech]

Basically, you need a low pass filter to do the job.

 

[levnu]

thanks
but what i look for is one companent that do the filtering job
and not a lowpass filter as a circuit includes more companents
Arye

 

[neutrino]

Hi, ferrite bead for low frequency application (below 20MHz) available on the market, do not have high impedance (few tens of Ohm) and therefore do not have advantages over other components normally used as filters (R-L-C).

 

[sunil_n]

hi,
you can just use a R-C filter,better work than ferrite. With the formula f=1/(2*3.14*R*C). one high pass & one low pass R-C circuit will help you to get your range of 1-20Mhz
the deign is there in the attachment

 

[biff44]

There are plenty of low frequency ferrite beads. They can be large though:

Chip Ferrite Beads / Chip "EMIFIL®" | Selection Guides | Murata Manufacturing Co., Ltd.

Also, realize that they will not reject RF as well or steeply as an actual lowpass filter. It does have the advantage that it will do so in a lossy way, without reflecting the energy.