A common mode choke is an electronic component used to filter electromagnetic interference (EMI) |
and radio frequency interference (RFI) from electrical circuits. It is also known as a line filter or a noise filter. |
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The common mode choke consists of two coils wound on a magnetic core. |
The coils are wound in such a way that they create a magnetic field that opposes the flow of current in both directions. |
This means that the common mode choke blocks any current that is common to both the input and output of the circuit, |
while allowing the differential mode current (the difference in current between the input and output) to pass through. |
Common mode chokes are used in a wide range of electronic devices, including power supplies, |
audio equipment, and data communication systems. They are particularly useful in applications |
where electromagnetic interference and radio frequency interference can cause signal distortion, noise, |
or other problems.By blocking unwanted noise and interference, common mode chokes can improve the performance |
and reliability of electronic systems. They can also help to ensure compliance with electromagnetic |
compatibility (EMC) standards, which are designed to limit the amount of interference |
that electronic devices can generate and be susceptible to. |