In summary, the function of common mode and differential mode chokes have been reviewed and two comparison designs have been proposed. The design equations for the integrated CMDM choke have been derived and a comparison has been made between the integrated and non-integrated components which resulted in a significant reduction in board space, product volume and power losses. Pulse Electronics, a YAGEO Company has now introduced the PA4040.xxxNL series of integrated common mode and differential mode components.