Contents
Can I remove the ferrite bead?
The ferrite beads near the small plug on the USB cables that came with the PLOTS visible/IR camera kit are easy to remove.
Where are ferrite beads used?
Various smaller ferrite beads are used internally in circuits—on conductors or around the pins of small circuit-board components, such as transistors, connectors and integrated circuits. On wires intended to be DC conductors, beads can block low level unintended radio frequency energy by acting as a low pass filter.
What is inside ferrite bead?
Ferrite beads are one of the simplest and least expensive types of interference filters to install on preexisting electronic cabling. Inside the bead component, a coil of wire runs between layers of ferrite to form a multi-turn inductor around the high-permeability core.
What are ferrite beads and what are they used for?
A collection of snap-on/clamp-on ferrite beads. A ferrite bead or ferrite choke is a passive electric component that suppresses high-frequency noise in electronic circuits. It is a specific type of electronic choke. Ferrite beads employ high-frequency current dissipation in a ferrite ceramic to build high-frequency noise suppression devices.
How are RF inductors used in PCB mount ferrite beads?
An RF inductor wound on a ferrite core (not a ferrite bead), and a PCB mount ferrite bead Ferrite beads are used as a passive low-pass filter, by dissipating RF energy to heat, by design. (Contrast this with inductors, which by design minimize conversion of RF energy to heat, offering a high impedance to RF.)
Where does a ferrite bead form a voltage divider?
When you place a ferrite bead in the signal path where it comes out of the unit its impedance at the emitted RF frequency forms an voltage divider with the external cable or termination impedance.
Why is it important to select the ferrite impedance?
Select the ferrite impedance so that the voltage divider effect I described gives you the amount of attenuation required. It should be obvious now why it can be so useful to keep the external cable and/or termination impedance as low as possible.