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Pat. 11038423 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 16/675452 : Filed 06.11.2019 : Pub. 15.06.2021 : / Hao Chen, Le Li, Xinlei Li ; Assignee Hangzhou Silergy Semiconductor Technology Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11038423/en?oq=US11038423.html (дата обращения: ДД.ММ.ГГГГ).