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Choke
Dec 03, 2018

The choke coil is a common-mode interference suppression device with ferrite core, it is made up of two different dimensions, the same turns of the coil symmetrically around the same ferrite ring core, forming a four-terminal device, as shown in Fig. 15e, to the common-mode signal to show a large inductance has inhibitory effect, But for the differential mode signal presents a very small leakage inductance almost does not work. The choke coil can effectively restrain the common-mode jamming signal (such as the Lightning interference) in the balance circuit, and has no effect on the normal transmission of the line.