We're making a pcb that's goal is to take in frequencies and filter out anything not in the 20-40Khz range. We will have a dc/dc converter, specifically this one:
so my question is: someone suggested we use a ferrite bead to make sure we eliminate any other noise on the dc/dc.. so do we need a ferrite bead?
All of the Ferrite beads i'm seeing are for Mhz range.. and I thought we didn't need one that high, but then the data sheet has a section on pg 3 that says "Ripple & Noise (20Mhz)". What does that mean? Would the ferrite bead solve that problem? If so, what are the specs of a ferrite bead that I should be looking for?
-Thanks-