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Pat. 10215784 United States, Int. Cl.22 H02M 5/42, G01R 21/133, G01R 25/00, H02M 5/45, H02P 21/02, H02P 23/00, H02P 23/14, H03L 7/08. Measuring apparatus including phase locked loop and measuring method thereof : Appl. N 15/832942 : Filed 06.12.2017 : Pub. 26.02.2019 : / Chun-Han Chen, Chun-Hsiang Yang, Yung-Jen Cheng, Ming-Fa Tsai, Ying-Che Weng ; Assignee Industrial Technology Research Institute Itri ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10215784/en?oq=US10215784.html (дата обращения: ДД.ММ.ГГГГ).