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Pat. 9941800 United States, Int. Cl.22 H02M 3/335, G01R 19/00, H02M 1/00. Measuring input voltages from reference windings of power converters with limited on-time : Appl. N 14/843777 : Filed 02.09.2015 : Pub. 10.04.2018 : / Juan Carlos Pastrana, Manisha P. Pandya, Sameer G. Kelkar, Nicholas A. Sims ; Assignee Apple Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9941800/en?oq=US9941800.html (дата обращения: ДД.ММ.ГГГГ).