Blocks all the noise.
A mighty guardian angel.

Noise Filters

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#04

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Electronic parts that keep interfering radio waves (noise) from getting out.
The noise filter uses power from the inductor and capacitor.
Noise filters are also sometimes called “EMI suppression filters”.

The Power of Noise Filters

We make your life easier!

Radio waves come mixed with interfering waves called “noise”. Smartphones, video game consoles, and Wi-Fi™ would all drop connections suddenly if that noise got through!
That’s why they use noise filters to separate the two.

A drawing of how noise filters work. Radio waves with noise pass through the noise filter and come out without noise.

The Secret of the Power of Noise Filters

There are two types of noise filters!

Noise filters can be either inductors or capacitors. These two types remove noise in different ways.
Inductors absorb only the noise from radio waves, and capacitors direct noise into its own circuit (the ground).
By the way... combining an inductor with a capacitor makes for an even better noise filter.

An illustration showing the two types of noise filters. The inductor type sucks noise out of the radio waves like a vacuum cleaner. The capacitor type directs noise into its own circuit (the ground).

Friends of Noise Filters

Chip Ferrite Beads

They’re used in all sorts of places because they’re so small.

Common Mode Choke Coils

Stops the noise when plugging in the power or sending audio.

Block Type EMI Suppression Filters

One filter can block many different types of noises.

Trivia

What are the units?

We use “impedance” for the size of the noise problem.
The unit of impedance is Ω (ohms). A higher number of ohms means noise has more trouble getting through.

Think it out!

QUESTION

The answer is 3, interfering radio waves.
The first is nose, and the second is a maze!

Find the Noise Filter!