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Pat. 10693449 United States, Int. Cl.22 H02M 3/158, H01L 27/088, H01L 29/08, H01L 29/10, H01L 29/417, H01L 29/423, H01L 29/78, H02M 1/08, H03K 17/06, H02M 1/00. Switching circuit device, step-down DC-DC converter, and element unit : Appl. N 16/335421 : Filed 15.09.2017 : Pub. 23.06.2020 : / Kazuki Itoh, Tetsuo Endoh ; Assignee Tohoku University Nuc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10693449/en?oq=US10693449.html (дата обращения: ДД.ММ.ГГГГ).