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A Guide to Understanding Common Mode Chokes | Coilcraft
https://www.coilcraft.com/en-us/edu/series/a-guide-to-understanding-common-mode-chokes/#:~:text=A%20common%20mode%20choke%20is%20an%20electrical%20filter,unwanted%20radio%20signals%2C%20unshielded%20electronics%2C%20inverters%20and%20motors.
common mode choke question - diyAudio
https://www.diyaudio.com/community/threads/common-mode-choke-question.104578/
A common mode choke has 2 windings on the same core. Imagine a single inductor on the AC high side with a phasing dot on the left of the coil. Now, place an exact inductor on the neutral line of the AC input with the phasing dot to the left of the coil. Now imagine these 2 coils on the same core and you have a common mode choke.
A Guide to Understanding Common Mode Chokes | Coilcraft
https://www.coilcraft.com/en-us/edu/series/a-guide-to-understanding-common-mode-chokes/
The main criteria for selecting a common mode choke are: Required impedance: How much attenuation of noise is needed? Required frequency range: Over what frequency bandwidth is the noise? ​Required current-handling: How much differential mode current must it handle?
Use of Ferrite Core Chokes . . . - General Forum ...
https://audiophilestyle.com/forums/topic/13258-use-of-ferrite-core-chokes/
On common mode signals (travelling over both wires in the same direction) it operates as a choke, because the resulting induced magnetic flux is non-zero. The effect on signals below 100..200 MHz is negligible. Below is a figure from a manufacturer's application manual showing the effect of a common mode choke on a USB cable.
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