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Fair-Rite 350 piece Ferrite Kit Includes Ferrite Beads

Wurth Elektronik 1020 piece Ferrite Kit Includes Ferrite Beads

Wurth Elektronik 690 piece Ferrite Kit Includes Ferrite Beads

KEMET 9 piece Ferrite Kit Includes Ferrite Beads

<p>Ferrite Beads also known as ferrite chokes are passive devices and they are used to constrict high-frequency signals in electronic components. The ferrite becomes resistive over its intended frequency range and uses up the noise energy in the form of heat.</p><h3>How do the ferrite beads work?</h3><p>The ferrite bead is connected in series with the power supply rail and is often combined with the capacitors to ground on either side of the bead. This then forms a low-pass filter network, further reducing the high-frequency power supply noise. Use SPICE (Simulation Program with Integrated Circuit Emphasis) or another similar tool to ensure any anti-resonance peaks caused by ferrite or PCB inductive structure does not violate the target impedance limit.</p><h3>Ferrite Beads come in two categories:</h3><ul><li>High-Q Beads - typically used as resonators and must not be used in power isolation circuits</li><li>Low-Q Beads - these are also called absorptive beads and they are lossy and make good filter networks because they are designed to absorb high-frequency noise currents and dissipate it as heat</li></ul><h3>What to consider when choosing Ferrite Beads?</h3><ul><li>Make sure that any voltage drop does not cause the target supply rail to fall below the recommended operating conditions of the device</li><li>The ferrite bead is inductive, therefore do not use it with High-Q decoupling capacitors</li><li>Applying ferrite beads correctly can be an effective and inexpensive way to reduce high-frequency noise and switching transients</li></ul><h3>Where are Ferrite Beads used?</h3><ul><li>Eliminating high-frequency EMI noise on any circuit design</li><li>Electronic devices such as mobile phones</li><li>Computers and laptops</li><li>TV tuners</li><li>Audio Players</li><li>DVD's</li><li>Gaming Systems</li></ul>

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