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Pat. 10199946 United States, Int. Cl.22 H02M 3/335. Systems and methods for adjusting peak frequencies with duty cycles : Appl. N 15/724062 : Filed 03.10.2017 : Pub. 05.02.2019 : / Xiaomin Huang, Yuan Lin, Huawei Lyu, Lieyi Fang ; Assignee On Bright Electronics Shanghai Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10199946/en?oq=US10199946.html (дата обращения: ДД.ММ.ГГГГ).