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Pat. 11394288 United States, Int. Cl.22 H02M 1/08, H02M 3/07, H02M 7/537, H03K 17/687. Negative voltage generation circuit and power conversion device using same : Appl. N 16/962015 : Filed 11.12.2018 : Pub. 19.07.2022 : / Yusuke Nakakohara, Yuta Okawauchi, Ken Nakahara, Shinichiro Nagai, Yuuki Ootabara ; Assignee Rohm Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11394288/en?oq=US11394288.html (дата обращения: ДД.ММ.ГГГГ).