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Pat. 10505452 United States, Int. Cl.22 H02M 3/157, H02M 1/08, H02M 3/156, H02M 3/158, H02M 1/00. Frequency control circuit, control method and switching converter : Appl. N 16/183916 : Filed 08.11.2018 : Pub. 10.12.2019 : / Hao Chen, Le Li, Xinlei Li ; Assignee Hangzhou Silergy Semiconductor Technology Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10505452/en?oq=US10505452.html (дата обращения: ДД.ММ.ГГГГ).