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Common mode Choke, also known as the Common mode Choke coil, the principle is through the common-mode current of the circular flux overlay each other, and then has a fairly large inductance, the inhibition effect of common-mode current, and when two coil through the differential mode current, flux of circular and cancel each other out, almost no inductance, so the differential mode current can pass without attenuation.
Therefore, the common mode choke can effectively suppress the common mode disturbance signal in the balanced line, but has no influence on the differential mode signal in the normal transmission of the line.
In the electronic product board planning, the common mode inductor plays the role of EMI filtering, which is used to suppress the electromagnetic wave radiating outward from the high-speed signal line.
Therefore, the common mode choke can effectively suppress the common mode disturbance signal in the balanced line, but has no influence on the differential mode signal in the normal transmission of the line.
In the electronic product board planning, the common mode inductor plays the role of EMI filtering, which is used to suppress the electromagnetic wave radiating outward from the high-speed signal line.
