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Pat. 11043926 United States, Int. Cl.22 H03F 3/21, H02M 3/15, H02M 3/158, H03F 1/02, H03F 3/217, H02M 3/156. Audio power source with improved efficiency : Appl. N 16/726754 : Filed 24.12.2019 : Pub. 22.06.2021 : / David F. Baretich, Simon J. Broadley ; Assignee Biamp Systems LLC ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11043926/en?oq=US11043926.html (дата обращения: ДД.ММ.ГГГГ).