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Pat. 9948172 United States, Int. Cl.22 H02M 1/15, H02M 1/14, H02M 3/156, H02M 5/458, H02M 1/00, H02M 7/48. Power converter for eliminating ripples : Appl. N 15/302487 : Filed 08.04.2015 : Pub. 17.04.2018 : / Joung Hu Park, Ahmed Ashraf ; Assignee Foundation of Soongsil University Industry Cooperation ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9948172/en?oq=US9948172.html (дата обращения: ДД.ММ.ГГГГ).