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A ferrite bead is a passive electric component, which is commonly used for suppressing high frequency noise in electronic circuits.

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Won't the ferrite bead (L3) will restrict sudden power requirement of bluetooth module (U4)

If you have a concern that the 0.6 Ohm 300 mA ferrite bead will restrict instantaneous current draw requirements of the RF module then the correct thing to look toward is the capacitance value and equ …
Michael Karas's user avatar
14 votes
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How to select a good Ferrite Bead

Ferrite beads are used as components of a low pass filter to limit the amount of high frequency energy that comes out of a circuit or chassis enclosure. For DC to low frequencies you want to select a …
Michael Karas's user avatar
2 votes
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Different voltages with Ferrite Beads

You need to look a bit closer at your schematic snippett. There are two versions of the Ethernet chip, the RTL8305S and the RTL8305SB. The circuit is built with the ferrite beads for the "S" version o …
Michael Karas's user avatar