How the ferrite bead is used in PCB?

A ferrite bead is used in printed circuit boards (PCBs) to suppress high-frequency noise and electromagnetic interference (EMI) in electronic circuits. It acts as a passive filter, allowing DC and low-frequency signals to pass while attenuating high-frequency noise. The bead is typically placed in series with a signal line or power supply to improve signal integrity and reduce unwanted emissions. This helps enhance the overall performance and reliability of the electronic device.