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Pat. 10530252 United States, Int. Cl.22 H02M 3/157, H02M 1/08, H02M 3/335, H02M 3/156. Pulse-frequency control circuit, microcomputer, DC-to-DC converter, and pulse-frequency control method : Appl. N 16/421080 : Filed 23.05.2019 : Pub. 07.01.2020 : / Katsuyuki Imamura, Takeaki Moto ; Assignee Panasonic Intellectual Property Management Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10530252/en?oq=US10530252.html (дата обращения: ДД.ММ.ГГГГ).