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Pat. 11329546 United States, Int. Cl.22 H02M 1/12, H02M 3/00, H02M 3/158. Power converter apparatus provided with low-pass filter circuit for reducing switching frequency components : Appl. N 17/259500 : Filed 11.03.2019 : Pub. 10.05.2022 : / Noriyuki Nosaka, Takeo Nishikawa, Wataru Okada, Satoshi Iwai, Takanori Ishii, Gun Eto ; Assignee Omron Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11329546/en?oq=US11329546.html (дата обращения: ДД.ММ.ГГГГ).