Why are common mode filters / chokes necessary?
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A. Common mode filters (common mode chokes) are used for noise suppression of differential transmission and power lines.
Filters and chokes are effective for suppression of radiation noise from electronic devices and cables, and for self-poisoning countermeasures (improved reception sensitivity) and noise immunity inside of wireless devices.
TDK’s common mode filters and chokes come in a diverse lineup for each type of usage. TDK has prepared a selection guide that makes it easy to check representative products.