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Pat. 10630173 United States, Int. Cl.22 H02M 3/07, H02M 1/15, H02M 1/00. Negative charge pump and audio ASIC with such negative charge pump : Appl. N 16/072047 : Filed 30.03.2017 : Pub. 21.04.2020 : / Lei Zou, Gino Rocca ; Assignee Tdk Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10630173/en?oq=US10630173.html (дата обращения: ДД.ММ.ГГГГ).