Common-mode chokes (CMCs) are used in automotive CAN networks to increase system reliability in terms of electromagnetic interference (EMI) by filtering and/or reducing the amount of unwanted high-frequency noise therefore helping to achieve electro-magnetic compliance (EMC). EMI can be emitted by the ECUs in the network which can adversely affect communications. Another function of the common-mode choke is to improve system susceptibility (immunity) of the CAN transceiver to any electromagnetic disturbances on the communications bus.