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Pat. 10320194 United States, Int. Cl.22 H02M 3/335, H02J 3/18, H02J 3/36, H02M 1/14, H02M 1/42. Control feedback loop design with fast transient response for multi-level converter : Appl. N 15/850752 : Filed 21.12.2017 : Pub. 11.06.2019 : / Zaohong Yang, Bogdan T. Bucheru ; Assignee Apple Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10320194/en?oq=US10320194.html (дата обращения: ДД.ММ.ГГГГ).