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Pat. 11424683 United States, Int. Cl.22 H02M 3/335, H02M 1/00, H02M 1/088, H02M 1/44. Darlington transistor drive circuit, method and constant current switching power supply : Appl. N 17/270430 : Filed 06.12.2019 : Pub. 23.08.2022 : / Kelvin Hui, Chong Huang, Yuquan Huang ; Assignee Fremont Micro Devices Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11424683/en?oq=US11424683.html (дата обращения: ДД.ММ.ГГГГ).