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Pat. 11223356 United States, Int. Cl.22 H03K 17/96, G06F 3/01, H01L 41/04, H02M 3/335, H03F 3/217. Driver circuit for analyzing and controlling a piezoelectric component, button providing haptic feedback, and operating method : Appl. N 16/493526 : Filed 16.03.2018 : Pub. 11.01.2022 : / Roman Puchleitner, Harald Kastl, Aditya Rajapurkar, Daniel Neuwirth ; Assignee Tdk Electronics Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11223356/en?oq=US11223356.html (дата обращения: ДД.ММ.ГГГГ).