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Pat. 9991799 United States, Int. Cl.22 H02M 3/335, H02M 1/00, H02M 1/08. Switch mode power supplies including primary side clamping circuits controlled based on secondary side signals : Appl. N 15/035712 : Filed 01.03.2016 : Pub. 05.06.2018 : / Jun Liu, Chunyu Ding, Qingfeng Liu, Zhendong Zhang ; Assignee Astec International Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9991799/en?oq=US9991799.html (дата обращения: ДД.ММ.ГГГГ).