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Pat. 9899930 United States, Int. Cl.22 H02M 3/158, H02M 1/08, H02M 1/14, H02M 3/335, H02M 1/00. Method and apparatus for phase alignment in semi-resonant power converters to avoid switching of power switches having negative current flow : Appl. N 15/154434 : Filed 13.05.2016 : Pub. 20.02.2018 : / Amir Babazadeh ; Assignee Infineon Technologies Austria Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9899930/en?oq=US9899930.html (дата обращения: ДД.ММ.ГГГГ).