I've used SMT ferrite beads for noise control in gate drives but never knew how they were constructed. The curves suggest a model of an inductor in parallel with a resistor, but the murata picture doesn't explain to me how the inductive element drops off at high frequency unless it's the core material itself which has a lot of loss above 10MHz.
I assumed the peak was its resonant frequency, but it doesn't drop off much. Until someone showed me this site I too didn't know how they were constructed, I imagined them merely as a straight through, fixed-resistance unit with effectively half a turn in ferrite. When I saw this it was an eye-opener, getting additional turns within the ferrite. It's always great finding out what's in the box.
Multilayer Chip Inductor
Re: Multilayer Chip Inductor
