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Pat. 10498257 United States, Int. Cl.22 H02M 1/42, H02M 1/00, H02M 1/08, H02M 1/084, H02M 3/157, H02M 7/21, H02M 7/505, H02M 7/525. Switching power converters controlled with control signals having variable on-times : Appl. N 15/628231 : Filed 20.06.2017 : Pub. 03.12.2019 : / Weng Fai Ng, Wai Chung Li, Kwok Wai Lo, Zhi Zhi Li, Chun Shing Cheng, Ka Kit Li ; Assignee Astec International Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10498257/en?oq=US10498257.html (дата обращения: ДД.ММ.ГГГГ).