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Pat. 11250984 United States, Int. Cl.22 H01F 27/00, H01F 27/24, H01F 27/28, H02M 3/335. Methods and apparatus for biasing a magnetic circuit to reduce audible noise from a switching power supply : Appl. N 16/822342 : Filed 18.03.2020 : Pub. 15.02.2022 : / William M. Polivka ; Assignee Power Integrations Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11250984/en?oq=US11250984.html (дата обращения: ДД.ММ.ГГГГ).