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Pat. 10256824 United States, Int. Cl.22 H03B 5/32, H03L 1/02, H03M 1/46, H03M 1/66, H03M 1/68, H03M 1/76, H03M 7/30, H02M 3/158. D/A converter, circuit device, oscillator, electronic apparatus and moving object : Appl. N 15/368935 : Filed 05.12.2016 : Pub. 09.04.2019 : / Shigenori Isozaki ; Assignee Seiko Epson Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10256824/en?oq=US10256824.html (дата обращения: ДД.ММ.ГГГГ).