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Pat. 11389831 United States, Int. Cl.22 H02M 3/07, B06B 1/02, H03K 17/51. Transformerless ultrasonic transducer activation with only one external energy store : Appl. N 17/155290 : Filed 22.01.2021 : Pub. 19.07.2022 : / Guido Schlautmann, Andre Schmidt, Stefanie Heppekausen ; Assignee Elmos Semiconductor Se ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11389831/en?oq=US11389831.html (дата обращения: ДД.ММ.ГГГГ).