Integration of parasitic cancellation techniques for EMI filter design

In this paper, effects of parasitic parameters on EMI filter performance are first discussed. The parasitic cancellation techniques for both self and mutual parasitics are then reviewed. The possibilities to integrate parasitic cancellation techniques into one EMI filter are analyzed. The constraints of the integration are identified. It is found that three parasitic cancellation techniques can be integrated into one EMI filter without any conflicts and compromises. Experiments are finally carried out to verify the integrated cancellation technique.