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Pat. 11121633 United States, Int. Cl.22 H02M 3/335, H01F 27/28, H02M 1/08, H01F 27/24, H01F 27/32, H02M 1/00. Low common mode noise transformers and switch-mode DC-DC power converters : Appl. N 16/689786 : Filed 20.11.2019 : Pub. 14.09.2021 : / James Sigamani ; Assignee Astec International Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11121633/en?oq=US11121633.html (дата обращения: ДД.ММ.ГГГГ).