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Pat. 10103647 United States, Int. Cl.22 H03K 3/017, G01R 19/00, G01R 19/25, H02M 1/14, H02M 7/5387, H03K 5/04, H03K 7/08, H02M 1/00. Sensorless measurement method and device for filter capacitor current by using a state observer : Appl. N 15/354528 : Filed 17.11.2016 : Pub. 16.10.2018 : / Shu-Syuan Huang, Yoshihiro Konishi, Zong-Zhen Yang, Min-Ju Hsieh ; Assignee Industrial Technology Research Institute Itri ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10103647/en?oq=US10103647.html (дата обращения: ДД.ММ.ГГГГ).