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Pat. 10848070 United States, Int. Cl.22 H02M 3/07, H02M 3/335, H02M 3/337, H02M 1/00. Switched-tank DC transformer and voltage ratio switching method thereof : Appl. N 16/676177 : Filed 06.11.2019 : Pub. 24.11.2020 : / Ming Li, Yiqing Ye ; Assignee Delta Electronics Shanghai Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10848070/en?oq=US10848070.html (дата обращения: ДД.ММ.ГГГГ).