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Pat. 9893622 United States, Int. Cl.22 H02M 3/158, H02M 1/08, H02M 1/14, H02M 1/32, H02M 1/36, H02M 1/00. Multi-level step-up converter topologies, control and soft start systems and methods : Appl. N 15/593685 : Filed 12.05.2017 : Pub. 13.02.2018 : / Serhii Mikhailovich Zhak, Mark Anthony Belch, Brett A. Miwa, David Harrington, Jonathan King ; Assignee Maxim Integrated Products Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9893622/en?oq=US9893622.html (дата обращения: ДД.ММ.ГГГГ).