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Pat. 10680563 United States, Int. Cl.22 H03F 3/193, H02M 1/32, H02M 1/36, H02M 3/156, H02M 3/325, H02M 3/335, H03F 1/02, H03F 3/217, H03F 3/45. Low wideband noise multi-stage switch-mode power amplifier : Appl. N 15/985921 : Filed 22.05.2018 : Pub. 09.06.2020 : / Earl W Mccune, Jr., Quentin Diduck ; Assignee Eridan Communications Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10680563/en?oq=US10680563.html (дата обращения: ДД.ММ.ГГГГ).